From 72d0f69542a029703a314dd92616cbd58b952ebc Mon Sep 17 00:00:00 2001 From: Thorsten Schlathoelter Date: Mon, 8 Jul 2024 00:12:03 +0200 Subject: [PATCH] feat(#1175): added random generator framework Framework was added in favour of OpenApiTestDataGenerator implementation --- .../openapi/OpenApiTestDataGenerator.java | 601 +----------------- .../OpenApiTestValidationDataGenerator.java | 12 +- .../OpenApiClientRequestActionBuilder.java | 9 +- .../OpenApiServerResponseActionBuilder.java | 27 +- .../openapi/random/RandomArrayGenerator.java | 51 ++ .../random/RandomCompositeGenerator.java | 74 +++ .../openapi/random/RandomConfiguration.java | 63 ++ .../openapi/random/RandomContext.java | 120 ++++ .../{util => random}/RandomElement.java | 2 +- .../openapi/random/RandomEnumGenerator.java | 25 + .../openapi/random/RandomGenerator.java | 61 ++ .../random/RandomGeneratorBuilder.java | 62 ++ .../{util => random}/RandomModelBuilder.java | 56 +- .../{util => random}/RandomModelWriter.java | 4 +- .../openapi/random/RandomNumberGenerator.java | 155 +++++ .../openapi/random/RandomObjectGenerator.java | 58 ++ .../openapi/random/RandomStringGenerator.java | 39 ++ .../openapi/util/OpenApiUtils.java | 11 + .../openapi/OpenApiTestDataGeneratorTest.java | 122 +--- .../random/OasRandomConfigurationTest.java | 179 ++++++ .../random/RandomArrayGeneratorTest.java | 106 +++ .../random/RandomCompositeGeneratorTest.java | 90 +++ .../openapi/random/RandomContextTest.java | 76 +++ .../{util => random}/RandomElementTest.java | 2 +- .../random/RandomEnumGeneratorTest.java | 77 +++ .../random/RandomGeneratorBuilderTest.java | 92 +++ .../openapi/random/RandomGeneratorTest.java | 152 +++++ .../RandomModelBuilderTest.java | 48 +- .../random/RandomNumberGeneratorTest.java | 217 +++++++ .../random/RandomObjectGeneratorTest.java | 134 ++++ .../random/RandomStringGeneratorTest.java | 70 ++ ...OpenApiRequestValidationProcessorTest.java | 4 +- .../OpenApiRequestValidatorTest.java | 9 +- ...penApiResponseValidationProcessorTest.java | 4 +- .../OpenApiResponseValidatorTest.java | 36 +- .../functions/DefaultFunctionLibrary.java | 2 +- .../core/AdvancedRandomNumberFunction.java | 201 ++++-- .../functions/core/RandomPatternFunction.java | 5 +- .../functions/core/RandomStringFunction.java | 23 +- .../org/citrusframework/util/StringUtils.java | 2 +- .../AdvancedRandomNumberFunctionTest.java | 416 ++++++++++++ .../core/RandomDoubleFunctionTest.java | 246 ------- .../core/RandomStringFunctionTest.java | 32 +- 43 files changed, 2669 insertions(+), 1106 deletions(-) create mode 100644 connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomArrayGenerator.java create mode 100644 connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomCompositeGenerator.java create mode 100644 connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomConfiguration.java create mode 100644 connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomContext.java rename connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/{util => random}/RandomElement.java (98%) create mode 100644 connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomEnumGenerator.java create mode 100644 connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomGenerator.java create mode 100644 connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomGeneratorBuilder.java rename connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/{util => random}/RandomModelBuilder.java (62%) rename connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/{util => random}/RandomModelWriter.java (97%) create mode 100644 connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomNumberGenerator.java create mode 100644 connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomObjectGenerator.java create mode 100644 connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomStringGenerator.java create mode 100644 connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/OasRandomConfigurationTest.java create mode 100644 connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomArrayGeneratorTest.java create mode 100644 connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomCompositeGeneratorTest.java create mode 100644 connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomContextTest.java rename connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/{util => random}/RandomElementTest.java (98%) create mode 100644 connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomEnumGeneratorTest.java create mode 100644 connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomGeneratorBuilderTest.java create mode 100644 connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomGeneratorTest.java rename connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/{util => random}/RandomModelBuilderTest.java (74%) create mode 100644 connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomNumberGeneratorTest.java create mode 100644 connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomObjectGeneratorTest.java create mode 100644 connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomStringGeneratorTest.java create mode 100644 core/citrus-base/src/test/java/org/citrusframework/functions/core/AdvancedRandomNumberFunctionTest.java delete mode 100644 core/citrus-base/src/test/java/org/citrusframework/functions/core/RandomDoubleFunctionTest.java diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/OpenApiTestDataGenerator.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/OpenApiTestDataGenerator.java index 74deef213f..106d06fd36 100644 --- a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/OpenApiTestDataGenerator.java +++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/OpenApiTestDataGenerator.java @@ -17,230 +17,43 @@ package org.citrusframework.openapi; import io.apicurio.datamodels.openapi.models.OasSchema; -import io.apicurio.datamodels.openapi.v3.models.Oas30Schema; import org.citrusframework.CitrusSettings; import org.citrusframework.context.TestContext; -import org.citrusframework.openapi.model.OasModelHelper; -import org.citrusframework.openapi.util.OpenApiUtils; -import org.citrusframework.openapi.util.RandomModelBuilder; - -import java.math.BigDecimal; -import java.math.RoundingMode; -import java.util.HashMap; -import java.util.HashSet; -import java.util.List; -import java.util.Map; -import java.util.Set; -import java.util.concurrent.ThreadLocalRandom; -import java.util.stream.Collectors; - -import static java.lang.Boolean.TRUE; -import static java.lang.String.format; -import static org.citrusframework.openapi.OpenApiConstants.TYPE_INTEGER; -import static org.citrusframework.util.StringUtils.hasText; -import static org.citrusframework.util.StringUtils.quote; -import static org.springframework.util.CollectionUtils.isEmpty; +import org.citrusframework.openapi.random.RandomContext; /** * Generates proper payloads and validation expressions based on Open API specification rules. */ public abstract class OpenApiTestDataGenerator { - public static final BigDecimal THOUSAND = new BigDecimal(1000); - public static final BigDecimal HUNDRED = BigDecimal.valueOf(100); - public static final BigDecimal MINUS_THOUSAND = new BigDecimal(-1000); - private OpenApiTestDataGenerator() { // Static access only } - private static final Map SPECIAL_FORMATS = Map.of( - "email", "[a-z]{5,15}\\.?[a-z]{5,15}\\@[a-z]{5,15}\\.[a-z]{2}", - "uri", - "((http|https)://[a-zA-Z0-9-]+(\\.[a-zA-Z]{2,})+(/[a-zA-Z0-9-]+){1,6})|(file:///[a-zA-Z0-9-]+(/[a-zA-Z0-9-]+){1,6})", - "hostname", - "(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\\-]*[a-zA-Z0-9])\\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\\-]*[A-Za-z0-9])", - "ipv4", - "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)", - "ipv6", - "(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))"); - /** * Creates payload from schema for outbound message. */ public static String createOutboundPayload(OasSchema schema, OpenApiSpecification specification) { - return createOutboundPayload(schema, - OasModelHelper.getSchemaDefinitions(specification.getOpenApiDoc(null)), specification); - } - - /** - * Creates payload from schema for outbound message. - */ - public static String createOutboundPayload(OasSchema schema, Map definitions, - OpenApiSpecification specification) { - return createOutboundPayload(schema, definitions, specification, new HashSet<>()); - } - - /** - * Creates payload from schema for outbound message. - */ - private static String createOutboundPayload(OasSchema schema, - Map definitions, - OpenApiSpecification specification, Set visitedRefSchemas) { - RandomModelBuilder randomModelBuilder = new RandomModelBuilder(); - createOutboundPayloadAsMap(randomModelBuilder, schema, definitions, specification, - visitedRefSchemas); - return randomModelBuilder.toString(); - } - - private static void createOutboundPayloadAsMap(RandomModelBuilder randomModelBuilder, - OasSchema schema, - Map definitions, - OpenApiSpecification specification, Set visitedRefSchemas) { - - if (hasText(schema.$ref) && visitedRefSchemas.contains(schema)) { - // Avoid recursion - return; - } - - if (OasModelHelper.isReferenceType(schema)) { - OasSchema resolved = definitions.get(OasModelHelper.getReferenceName(schema.$ref)); - createOutboundPayloadAsMap(randomModelBuilder, resolved, definitions, specification, - visitedRefSchemas); - return; - } - - if (OasModelHelper.isCompositeSchema(schema)) { - createComposedSchema(randomModelBuilder, schema, true, specification, - visitedRefSchemas); - return; - } - - switch (schema.type) { - case OpenApiConstants.TYPE_OBJECT -> - createRandomObjectSchemeMap(randomModelBuilder, schema, specification, - visitedRefSchemas); - case OpenApiConstants.TYPE_ARRAY -> - createRandomArrayValueMap(randomModelBuilder, schema, specification, - visitedRefSchemas); - case OpenApiConstants.TYPE_STRING, TYPE_INTEGER, OpenApiConstants.TYPE_NUMBER, OpenApiConstants.TYPE_BOOLEAN -> - createRandomValueExpressionMap(randomModelBuilder, schema, true); - default -> randomModelBuilder.appendSimple("\"\""); - } + RandomContext randomContext = new RandomContext(specification, true); + randomContext.generate(schema); + return randomContext.getRandomModelBuilder().write(); } /** * Use test variable with given name if present or create value from schema with random values */ - public static String createRandomValueExpression(String name, OasSchema schema, - Map definitions, - boolean quotes, OpenApiSpecification specification, TestContext context) { + public static String createRandomValueExpression(String name, OasSchema schema, OpenApiSpecification specification, + TestContext context) { + if (context.getVariables().containsKey(name)) { return CitrusSettings.VARIABLE_PREFIX + name + CitrusSettings.VARIABLE_SUFFIX; } - return createRandomValueExpression(schema, definitions, quotes, specification); - } - - /** - * Create payload from schema with random values. - */ - public static String createRandomValueExpression(OasSchema schema, - Map definitions, boolean quotes, - OpenApiSpecification specification) { - if (OasModelHelper.isReferenceType(schema)) { - OasSchema resolved = definitions.get(OasModelHelper.getReferenceName(schema.$ref)); - return createRandomValueExpression(resolved, definitions, quotes, specification); - } - - StringBuilder payload = new StringBuilder(); - if (OasModelHelper.isObjectType(schema) || OasModelHelper.isArrayType(schema)) { - payload.append(createOutboundPayload(schema, definitions, specification)); - } else if (OpenApiConstants.TYPE_STRING.equals(schema.type)) { - if (quotes) { - payload.append("\""); - } - if (OpenApiConstants.FORMAT_DATE.equals(schema.format)) { - payload.append("citrus:currentDate('yyyy-MM-dd')"); - } else if (OpenApiConstants.FORMAT_DATE_TIME.equals(schema.format)) { - payload.append("citrus:currentDate('yyyy-MM-dd'T'hh:mm:ssZ')"); - } else if (hasText(schema.pattern)) { - payload.append("citrus:randomValue(").append(schema.pattern).append(")"); - } else if (!isEmpty(schema.enum_)) { - payload.append("citrus:randomEnumValue(").append( - schema.enum_.stream().map(value -> "'" + value + "'") - .collect(Collectors.joining(","))).append(")"); - } else if (OpenApiConstants.FORMAT_UUID.equals(schema.format)) { - payload.append("citrus:randomUUID()"); - } else { - if (schema.format != null && SPECIAL_FORMATS.containsValue(schema.format)) { - payload.append("citrus:randomValue('") - .append(SPECIAL_FORMATS.get(schema.format)).append("')"); - } else { - int length = 10; - if (schema.maxLength != null && schema.maxLength.intValue() > 0) { - length = schema.maxLength.intValue(); - } else if (schema.minLength != null && schema.minLength.intValue() > 0) { - length = schema.minLength.intValue(); - } - - payload.append("citrus:randomString(").append(length).append(")"); - } - } - - if (quotes) { - payload.append("\""); - } - } else if (OpenApiUtils.isAnyNumberScheme(schema)) { - payload.append("citrus:randomNumber(8)"); - } else if (OpenApiConstants.TYPE_BOOLEAN.equals(schema.type)) { - payload.append("citrus:randomEnumValue('true', 'false')"); - } else if (quotes) { - payload.append("\"\""); - } - - return payload.toString(); - } - - public static T createRawRandomValueExpression(OasSchema schema, - Map definitions, boolean quotes, - OpenApiSpecification specification, TestContext context) { - if (OasModelHelper.isReferenceType(schema)) { - OasSchema resolved = definitions.get(OasModelHelper.getReferenceName(schema.$ref)); - return createRawRandomValueExpression(resolved, definitions, quotes, specification, - context); - } - - StringBuilder payload = new StringBuilder(); - if (OpenApiConstants.TYPE_STRING.equals(schema.type) || OasModelHelper.isObjectType(schema) - || OasModelHelper.isArrayType(schema)) { - return (T) createRandomValueExpression(schema, definitions, quotes, specification); - } else if (OpenApiConstants.TYPE_NUMBER.equals(schema.type)) { - return (T) Double.valueOf( - context.replaceDynamicContentInString("citrus:randomNumber(8,2)")); - } else if ("integer".equals(schema.type)) { - return (T) Double.valueOf( - context.replaceDynamicContentInString("citrus:randomNumber(8)")); - } else if ("boolean".equals(schema.type)) { - return (T) Boolean.valueOf( - context.replaceDynamicContentInString("citrus:randomEnumValue('true', 'false')")); - } else if (quotes) { - payload.append("\"\""); - } - - return (T) payload.toString(); - } - - /** - * Checks if given field name is in list of required fields for this schema. - */ - private static boolean isRequired(OasSchema schema, String field) { - if (schema.required == null) { - return true; - } + RandomContext randomContext = new RandomContext(specification, false); + randomContext.generate(schema); + return randomContext.getRandomModelBuilder().write(); - return schema.required.contains(field); } /** @@ -249,398 +62,20 @@ private static boolean isRequired(OasSchema schema, String field) { */ public static String createRandomValueExpression(String name, OasSchema schema, TestContext context) { + if (context.getVariables().containsKey(name)) { return CitrusSettings.VARIABLE_PREFIX + name + CitrusSettings.VARIABLE_SUFFIX; } - RandomModelBuilder randomModelBuilder = new RandomModelBuilder(); - createRandomValueExpressionMap(randomModelBuilder, schema, false); - return randomModelBuilder.toString(); - } - - public static String createRandomValueExpression(OasSchema schema, boolean quotes) { - RandomModelBuilder randomModelBuilder = new RandomModelBuilder(); - createRandomValueExpressionMap(randomModelBuilder, schema, quotes); - return randomModelBuilder.toString(); - } - - /** - * Create random value expression using functions according to schema type and format. - */ - private static void createRandomValueExpressionMap(RandomModelBuilder randomModelBuilder, - OasSchema schema, boolean quotes) { - - switch (schema.type) { - case OpenApiConstants.TYPE_STRING -> { - if (OpenApiConstants.FORMAT_DATE.equals(schema.format)) { - randomModelBuilder.appendSimple( - quote("citrus:currentDate('yyyy-MM-dd')", quotes)); - } else if (OpenApiConstants.FORMAT_DATE_TIME.equals(schema.format)) { - randomModelBuilder.appendSimple( - quote("citrus:currentDate('yyyy-MM-dd'T'hh:mm:ssZ')", quotes)); - } else if (hasText(schema.pattern)) { - randomModelBuilder.appendSimple( - quote("citrus:randomValue('" + schema.pattern + "')", quotes)); - } else if (!isEmpty(schema.enum_)) { - randomModelBuilder.appendSimple( - quote("citrus:randomEnumValue(" + (java.lang.String.join(",", schema.enum_)) - + ")", quotes)); - } else if (OpenApiConstants.FORMAT_UUID.equals(schema.format)) { - randomModelBuilder.appendSimple(quote("citrus:randomUUID()", quotes)); - } else { - - if (schema.format != null && SPECIAL_FORMATS.containsKey(schema.format)) { - randomModelBuilder.appendSimple(quote( - "citrus:randomValue('" + SPECIAL_FORMATS.get(schema.format) + "')", - quotes)); - } else { - long minLength = - schema.minLength != null && schema.minLength.longValue() > 0 - ? schema.minLength.longValue() : 10L; - long maxLength = - schema.maxLength != null && schema.maxLength.longValue() > 0 - ? schema.maxLength.longValue() : 10L; - long length = ThreadLocalRandom.current() - .nextLong(minLength, maxLength + 1); - randomModelBuilder.appendSimple( - quote("citrus:randomString(%s)".formatted(length), quotes)); - } - } - } - case OpenApiConstants.TYPE_NUMBER, TYPE_INTEGER -> - // No quotes for numbers - randomModelBuilder.appendSimple(createRandomNumber(schema)); - case OpenApiConstants.TYPE_BOOLEAN -> - // No quotes for boolean - randomModelBuilder.appendSimple("citrus:randomEnumValue('true', 'false')"); - default -> randomModelBuilder.appendSimple(""); - } - } - - private static String createRandomNumber(OasSchema schema) { - Number multipleOf = schema.multipleOf; - - boolean exclusiveMaximum = TRUE.equals(schema.exclusiveMaximum); - boolean exclusiveMinimum = TRUE.equals(schema.exclusiveMinimum); - - BigDecimal[] bounds = determineBounds(schema); - - BigDecimal minimum = bounds[0]; - BigDecimal maximum = bounds[1]; - - if (multipleOf != null) { - minimum = exclusiveMinimum ? incrementToExclude(minimum) : minimum; - maximum = exclusiveMaximum ? decrementToExclude(maximum) : maximum; - return createMultipleOf(minimum, maximum, new BigDecimal(multipleOf.toString())); - } - - return format( - "citrus:randomNumberGenerator('%d', '%s', '%s', '%s', '%s')", - determineDecimalPlaces(schema, minimum, maximum), - minimum, - maximum, - exclusiveMinimum, - exclusiveMaximum - ); + RandomContext randomContext = new RandomContext(); + randomContext.generate(schema); + return randomContext.getRandomModelBuilder().write(); } - /** - * Determines the number of decimal places to use based on the given schema and minimum/maximum values. - * For integer types, it returns 0. For other types, it returns the maximum number of decimal places - * found between the minimum and maximum values, with a minimum of 2 decimal places. - */ - private static int determineDecimalPlaces(OasSchema schema, BigDecimal minimum, - BigDecimal maximum) { - if (TYPE_INTEGER.equals(schema.type)) { - return 0; - } else { - return - Math.max(2, Math.max(findLeastSignificantDecimalPlace(minimum), - findLeastSignificantDecimalPlace(maximum))); - } + public static String createRandomValueExpression(OasSchema schema) { + RandomContext randomContext = new RandomContext(); + randomContext.generate(schema); + return randomContext.getRandomModelBuilder().write(); } - /** - * Determine some reasonable bounds for a random number - */ - private static BigDecimal[] determineBounds(OasSchema schema) { - Number maximum = schema.maximum; - Number minimum = schema.minimum; - Number multipleOf = schema.multipleOf; - - BigDecimal bdMinimum; - BigDecimal bdMaximum; - if (minimum == null && maximum == null) { - bdMinimum = MINUS_THOUSAND; - bdMaximum = THOUSAND; - } else if (minimum == null) { - // Determine min relative to max - bdMaximum = new BigDecimal(maximum.toString()); - - if (multipleOf != null) { - bdMinimum = bdMaximum.subtract(new BigDecimal(multipleOf.toString()).abs().multiply( - HUNDRED)); - } else { - bdMinimum = bdMaximum.subtract(bdMaximum.multiply(BigDecimal.valueOf(2)).max( - THOUSAND)); - } - } else if (maximum == null) { - // Determine max relative to min - bdMinimum = new BigDecimal(minimum.toString()); - if (multipleOf != null) { - bdMaximum = bdMinimum.add(new BigDecimal(multipleOf.toString()).abs().multiply( - HUNDRED)); - } else { - bdMaximum = bdMinimum.add(bdMinimum.multiply(BigDecimal.valueOf(2)).max(THOUSAND)); - } - } else { - bdMaximum = new BigDecimal(maximum.toString()); - bdMinimum = new BigDecimal(minimum.toString()); - } - - return new BigDecimal[]{bdMinimum, bdMaximum}; - } - - /** - * Create a random schema value - * - * @param schema the type to create - * @param visitedRefSchemas the schemas already created during descent, used to avoid recursion - */ - private static void createRandomValue(RandomModelBuilder randomModelBuilder, OasSchema schema, - boolean quotes, - OpenApiSpecification specification, Set visitedRefSchemas) { - if (hasText(schema.$ref) && visitedRefSchemas.contains(schema)) { - // Avoid recursion - return; - } - - if (OasModelHelper.isReferenceType(schema)) { - OasSchema resolved = OasModelHelper.getSchemaDefinitions( - specification.getOpenApiDoc(null)) - .get(OasModelHelper.getReferenceName(schema.$ref)); - createRandomValue(randomModelBuilder, resolved, quotes, specification, - visitedRefSchemas); - return; - } - - if (OasModelHelper.isCompositeSchema(schema)) { - createComposedSchema(randomModelBuilder, schema, quotes, specification, - visitedRefSchemas); - return; - } - - switch (schema.type) { - case OpenApiConstants.TYPE_OBJECT -> - createRandomObjectSchemeMap(randomModelBuilder, schema, specification, - visitedRefSchemas); - case OpenApiConstants.TYPE_ARRAY -> - createRandomArrayValueMap(randomModelBuilder, schema, specification, - visitedRefSchemas); - case OpenApiConstants.TYPE_STRING, TYPE_INTEGER, OpenApiConstants.TYPE_NUMBER, OpenApiConstants.TYPE_BOOLEAN -> - createRandomValueExpressionMap(randomModelBuilder, schema, quotes); - default -> { - if (quotes) { - randomModelBuilder.appendSimple("\"\""); - } else { - randomModelBuilder.appendSimple(""); - } - } - } - } - - private static void createRandomObjectSchemeMap(RandomModelBuilder randomModelBuilder, - OasSchema objectSchema, - OpenApiSpecification specification, Set visitedRefSchemas) { - - randomModelBuilder.object(() -> { - if (objectSchema.properties != null) { - for (Map.Entry entry : objectSchema.properties.entrySet()) { - if (specification.isGenerateOptionalFields() || isRequired(objectSchema, - entry.getKey())) { - randomModelBuilder.property(entry.getKey(), () -> - createRandomValue(randomModelBuilder, entry.getValue(), true, - specification, - visitedRefSchemas)); - } - } - } - }); - } - - private static void createComposedSchema(RandomModelBuilder randomModelBuilder, - OasSchema schema, boolean quotes, - OpenApiSpecification specification, Set visitedRefSchemas) { - - if (!isEmpty(schema.allOf)) { - createAllOff(randomModelBuilder, schema, quotes, specification, visitedRefSchemas); - } else if (schema instanceof Oas30Schema oas30Schema && !isEmpty(oas30Schema.anyOf)) { - createAnyOf(randomModelBuilder, oas30Schema, quotes, specification, visitedRefSchemas); - } else if (schema instanceof Oas30Schema oas30Schema && !isEmpty(oas30Schema.oneOf)) { - createOneOf(randomModelBuilder, oas30Schema.oneOf, quotes, specification, - visitedRefSchemas); - } - } - - private static void createOneOf(RandomModelBuilder randomModelBuilder, List schemas, - boolean quotes, - OpenApiSpecification specification, Set visitedRefSchemas) { - int schemaIndex = ThreadLocalRandom.current().nextInt(schemas.size()); - randomModelBuilder.object(() -> - createRandomValue(randomModelBuilder, schemas.get(schemaIndex), quotes, specification, - visitedRefSchemas)); - } - - private static void createAnyOf(RandomModelBuilder randomModelBuilder, Oas30Schema schema, - boolean quotes, - OpenApiSpecification specification, Set visitedRefSchemas) { - - randomModelBuilder.object(() -> { - boolean anyAdded = false; - for (OasSchema oneSchema : schema.anyOf) { - if (ThreadLocalRandom.current().nextBoolean()) { - createRandomValue(randomModelBuilder, oneSchema, quotes, specification, - visitedRefSchemas); - anyAdded = true; - } - } - - // Add at least one - if (!anyAdded) { - createOneOf(randomModelBuilder, schema.anyOf, quotes, specification, - visitedRefSchemas); - } - }); - } - - private static Map createAllOff(RandomModelBuilder randomModelBuilder, - OasSchema schema, boolean quotes, - OpenApiSpecification specification, Set visitedRefSchemas) { - Map allOf = new HashMap<>(); - - randomModelBuilder.object(() -> { - for (OasSchema oneSchema : schema.allOf) { - createRandomValue(randomModelBuilder, oneSchema, quotes, specification, - visitedRefSchemas); - } - }); - - return allOf; - } - - private static String createMultipleOf( - BigDecimal minimum, - BigDecimal maximum, - BigDecimal multipleOf - ) { - - BigDecimal lowestMultiple = lowestMultipleOf(minimum, multipleOf); - BigDecimal largestMultiple = largestMultipleOf(maximum, multipleOf); - - // Check if there are no valid multiples in the range - if (lowestMultiple.compareTo(largestMultiple) > 0) { - return null; - } - - BigDecimal range = largestMultiple.subtract(lowestMultiple) - .divide(multipleOf, RoundingMode.DOWN); - - // Don't go for incredible large numbers - if (range.compareTo(BigDecimal.valueOf(11)) > 0) { - range = BigDecimal.valueOf(10); - } - - long factor = 0; - if (range.compareTo(BigDecimal.ZERO) != 0) { - factor = ThreadLocalRandom.current().nextLong(1, range.longValue() + 1); - } - BigDecimal randomMultiple = lowestMultiple.add( - multipleOf.multiply(BigDecimal.valueOf(factor))); - randomMultiple = randomMultiple.setScale(findLeastSignificantDecimalPlace(multipleOf), - RoundingMode.HALF_UP); - - return randomMultiple.toString(); - } - - /** - * Create a random array value. - * - * @param schema the type to create - * @param visitedRefSchemas the schemas already created during descent, used to avoid recursion - */ - @SuppressWarnings("rawtypes") - private static void createRandomArrayValueMap(RandomModelBuilder randomModelBuilder, - OasSchema schema, - OpenApiSpecification specification, Set visitedRefSchemas) { - Object items = schema.items; - - if (items instanceof OasSchema itemsSchema) { - createRandomArrayValueWithSchemaItem(randomModelBuilder, schema, itemsSchema, - specification, - visitedRefSchemas); - } else { - throw new UnsupportedOperationException( - "Random array creation for an array with items having different schema is currently not supported!"); - } - } - - private static void createRandomArrayValueWithSchemaItem(RandomModelBuilder randomModelBuilder, - OasSchema schema, - OasSchema itemsSchema, OpenApiSpecification specification, - Set visitedRefSchemas) { - Number minItems = schema.minItems; - minItems = minItems != null ? minItems : 1; - Number maxItems = schema.maxItems; - maxItems = maxItems != null ? maxItems : 9; - - int nItems = ThreadLocalRandom.current() - .nextInt(minItems.intValue(), maxItems.intValue() + 1); - - randomModelBuilder.array(() -> { - for (int i = 0; i < nItems; i++) { - createRandomValue(randomModelBuilder, itemsSchema, true, specification, - visitedRefSchemas); - } - }); - } - - static BigDecimal largestMultipleOf(BigDecimal highest, BigDecimal multipleOf) { - RoundingMode roundingMode = - highest.compareTo(BigDecimal.ZERO) < 0 ? RoundingMode.UP : RoundingMode.DOWN; - BigDecimal factor = highest.divide(multipleOf, 0, roundingMode); - return multipleOf.multiply(factor); - } - - static BigDecimal lowestMultipleOf(BigDecimal lowest, BigDecimal multipleOf) { - RoundingMode roundingMode = - lowest.compareTo(BigDecimal.ZERO) < 0 ? RoundingMode.DOWN : RoundingMode.UP; - BigDecimal factor = lowest.divide(multipleOf, 0, roundingMode); - return multipleOf.multiply(factor); - } - - static BigDecimal incrementToExclude(BigDecimal val) { - return val.add(determineIncrement(val)) - .setScale(findLeastSignificantDecimalPlace(val), RoundingMode.HALF_DOWN); - } - - static BigDecimal decrementToExclude(BigDecimal val) { - return val.subtract(determineIncrement(val)) - .setScale(findLeastSignificantDecimalPlace(val), RoundingMode.HALF_DOWN); - } - - static BigDecimal determineIncrement(BigDecimal number) { - return BigDecimal.valueOf(1.0d / (Math.pow(10d, findLeastSignificantDecimalPlace(number)))); - } - - static int findLeastSignificantDecimalPlace(BigDecimal number) { - number = number.stripTrailingZeros(); - - String[] parts = number.toPlainString().split("\\."); - - if (parts.length == 1) { - return 0; - } - - return parts[1].length(); - } } diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/OpenApiTestValidationDataGenerator.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/OpenApiTestValidationDataGenerator.java index 3f9e123679..95033bb26c 100644 --- a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/OpenApiTestValidationDataGenerator.java +++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/OpenApiTestValidationDataGenerator.java @@ -175,7 +175,7 @@ private static String createValidationExpression(OasSchema schema) { } switch (schema.type) { - case "string" : + case OpenApiConstants.TYPE_STRING : if (schema.format != null && schema.format.equals("date")) { return "@matchesDatePattern('yyyy-MM-dd')@"; } else if (schema.format != null && schema.format.equals("date-time")) { @@ -190,7 +190,7 @@ private static String createValidationExpression(OasSchema schema) { } case OpenApiConstants.TYPE_NUMBER, OpenApiConstants.TYPE_INTEGER: return "@isNumber()@"; - case "boolean" : + case OpenApiConstants.TYPE_BOOLEAN : return "@matches(true|false)@"; default: return "@ignore@"; @@ -219,7 +219,7 @@ public static String createValidationRegex(@Nullable OasSchema schema) { } switch (schema.type) { - case "string" : + case OpenApiConstants.TYPE_STRING: if (schema.format != null && schema.format.equals("date")) { return "\\d{4}-(0[1-9]|1[0-2])-(0[1-9]|[12]\\d|3[01])"; } else if (schema.format != null && schema.format.equals("date-time")) { @@ -227,7 +227,7 @@ public static String createValidationRegex(@Nullable OasSchema schema) { } else if (hasText(schema.pattern)) { return schema.pattern; } else if (!isEmpty(schema.enum_)) { - return "(" + (String.join("|", schema.enum_)) + ")"; + return "(" + String.join("|", schema.enum_) + ")"; } else if (schema.format != null && schema.format.equals("uuid")) { return "[0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{4}-[0-9a-fA-F]{12}"; } else { @@ -235,9 +235,9 @@ public static String createValidationRegex(@Nullable OasSchema schema) { } case OpenApiConstants.TYPE_NUMBER: return "[0-9]+\\.?[0-9]*"; - case "integer" : + case OpenApiConstants.TYPE_INTEGER: return "[0-9]+"; - case "boolean" : + case OpenApiConstants.TYPE_BOOLEAN: return "(true|false)"; default: return ""; diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/actions/OpenApiClientRequestActionBuilder.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/actions/OpenApiClientRequestActionBuilder.java index 616e5b119b..a7722559f1 100644 --- a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/actions/OpenApiClientRequestActionBuilder.java +++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/actions/OpenApiClientRequestActionBuilder.java @@ -132,7 +132,7 @@ private void buildMessageFromOperation(OperationPathAdapter operationPathAdapter if (context.getVariables().containsKey(parameter.getName())) { parameterValue = "\\" + CitrusSettings.VARIABLE_PREFIX + parameter.getName() + CitrusSettings.VARIABLE_SUFFIX; } else { - parameterValue = OpenApiTestDataGenerator.createRandomValueExpression((OasSchema) parameter.schema, false); + parameterValue = OpenApiTestDataGenerator.createRandomValueExpression((OasSchema) parameter.schema); } randomizedPath = Pattern.compile("\\{" + parameter.getName() + "}") .matcher(randomizedPath) @@ -151,8 +151,7 @@ private void buildMessageFromOperation(OperationPathAdapter operationPathAdapter private void setSpecifiedBody(TestContext context, OasOperation operation) { Optional body = OasModelHelper.getRequestBodySchema( openApiSpec.getOpenApiDoc(context), operation); - body.ifPresent(oasSchema -> httpMessage.setPayload(OpenApiTestDataGenerator.createOutboundPayload(oasSchema, - OasModelHelper.getSchemaDefinitions(openApiSpec.getOpenApiDoc(context)), openApiSpec))); + body.ifPresent(oasSchema -> httpMessage.setPayload(OpenApiTestDataGenerator.createOutboundPayload(oasSchema, openApiSpec))); } private void setSpecifiedQueryParameters(TestContext context, OasOperation operation) { @@ -179,9 +178,7 @@ private void setSpecifiedHeaders(TestContext context, OasOperation operation) { .forEach(param -> { if(httpMessage.getHeader(param.getName()) == null && !configuredHeaders.contains(param.getName())) { httpMessage.setHeader(param.getName(), - OpenApiTestDataGenerator.createRandomValueExpression(param.getName(), (OasSchema) param.schema, - OasModelHelper.getSchemaDefinitions(openApiSpec.getOpenApiDoc( - context)), false, openApiSpec, context)); + OpenApiTestDataGenerator.createRandomValueExpression(param.getName(), (OasSchema) param.schema, openApiSpec, context)); } }); } diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/actions/OpenApiServerResponseActionBuilder.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/actions/OpenApiServerResponseActionBuilder.java index d5914d336e..3b4a522f92 100644 --- a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/actions/OpenApiServerResponseActionBuilder.java +++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/actions/OpenApiServerResponseActionBuilder.java @@ -24,7 +24,6 @@ import static org.springframework.http.MediaType.APPLICATION_JSON_VALUE; import static org.springframework.http.MediaType.TEXT_PLAIN_VALUE; -import io.apicurio.datamodels.openapi.models.OasDocument; import io.apicurio.datamodels.openapi.models.OasOperation; import io.apicurio.datamodels.openapi.models.OasResponse; import io.apicurio.datamodels.openapi.models.OasSchema; @@ -160,26 +159,24 @@ public Message build(TestContext context, String messageType) { } private void fillRandomData(OperationPathAdapter operationPathAdapter, TestContext context) { - OasDocument oasDocument = openApiSpec.getOpenApiDoc(context); if (operationPathAdapter.operation().responses != null) { - buildResponse(context, operationPathAdapter.operation(), oasDocument); + buildResponse(context, operationPathAdapter.operation()); } } - private void buildResponse(TestContext context, OasOperation operation, - OasDocument oasDocument) { + private void buildResponse(TestContext context, OasOperation operation) { Optional responseForRandomGeneration = OasModelHelper.getResponseForRandomGeneration( openApiSpec.getOpenApiDoc(context), operation, statusCode, null); if (responseForRandomGeneration.isPresent()) { - buildRandomHeaders(context, oasDocument, responseForRandomGeneration.get()); - buildRandomPayload(operation, oasDocument, responseForRandomGeneration.get()); + buildRandomHeaders(context, responseForRandomGeneration.get()); + buildRandomPayload(operation, responseForRandomGeneration.get()); } } - private void buildRandomHeaders(TestContext context, OasDocument oasDocument, OasResponse response) { + private void buildRandomHeaders(TestContext context, OasResponse response) { Set filteredHeaders = new HashSet<>(getMessage().getHeaders().keySet()); Predicate> filteredHeadersPredicate = entry -> !filteredHeaders.contains( entry.getKey()); @@ -191,7 +188,6 @@ private void buildRandomHeaders(TestContext context, OasDocument oasDocument, Oa .forEach(entry -> addHeaderBuilder(new DefaultHeaderBuilder( singletonMap(entry.getKey(), createRandomValueExpression(entry.getKey(), entry.getValue(), - OasModelHelper.getSchemaDefinitions(oasDocument), false, openApiSpec, context)))) ); @@ -209,8 +205,7 @@ private void buildRandomHeaders(TestContext context, OasDocument oasDocument, Oa + CitrusSettings.VARIABLE_SUFFIX))))); } - private void buildRandomPayload(OasOperation operation, OasDocument oasDocument, - OasResponse response) { + private void buildRandomPayload(OasOperation operation, OasResponse response) { Optional> schemaForMediaTypeOptional; if (statusCode.startsWith("2")) { @@ -227,7 +222,7 @@ private void buildRandomPayload(OasOperation operation, OasDocument oasDocument, OasAdapter schemaForMediaType = schemaForMediaTypeOptional.get(); if (getMessage().getPayload() == null || ( getMessage().getPayload() instanceof String string && string.isEmpty())) { - createRandomPayload(getMessage(), oasDocument, schemaForMediaType); + createRandomPayload(getMessage(), schemaForMediaType); } // If we have a schema and a media type and the content type has not yet been set, do it. @@ -238,7 +233,7 @@ private void buildRandomPayload(OasOperation operation, OasDocument oasDocument, } } - private void createRandomPayload(HttpMessage message, OasDocument oasDocument, OasAdapter schemaForMediaType) { + private void createRandomPayload(HttpMessage message, OasAdapter schemaForMediaType) { if (schemaForMediaType.node() == null) { // No schema means no payload, no type @@ -246,13 +241,11 @@ private void createRandomPayload(HttpMessage message, OasDocument oasDocument, O } else { if (TEXT_PLAIN_VALUE.equals(schemaForMediaType.adapted())) { // Schema but plain text - message.setPayload(createOutboundPayload(schemaForMediaType.node(), - OasModelHelper.getSchemaDefinitions(oasDocument), openApiSpec)); + message.setPayload(createOutboundPayload(schemaForMediaType.node(), openApiSpec)); message.setHeader(HttpMessageHeaders.HTTP_CONTENT_TYPE, TEXT_PLAIN_VALUE); } else if (APPLICATION_JSON_VALUE.equals(schemaForMediaType.adapted())) { // Json Schema - message.setPayload(createOutboundPayload(schemaForMediaType.node(), - OasModelHelper.getSchemaDefinitions(oasDocument), openApiSpec)); + message.setPayload(createOutboundPayload(schemaForMediaType.node(), openApiSpec)); message.setHeader(HttpMessageHeaders.HTTP_CONTENT_TYPE, APPLICATION_JSON_VALUE); } } diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomArrayGenerator.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomArrayGenerator.java new file mode 100644 index 0000000000..afee6f3f68 --- /dev/null +++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomArrayGenerator.java @@ -0,0 +1,51 @@ +package org.citrusframework.openapi.random; + +import io.apicurio.datamodels.openapi.models.OasSchema; +import java.util.concurrent.ThreadLocalRandom; +import org.citrusframework.openapi.model.OasModelHelper; + +/** + * A generator for producing random arrays based on an OpenAPI schema. This class extends the + * {@link RandomGenerator} and provides a specific implementation for generating random arrays + * with constraints defined in the schema. + * + *

The generator supports arrays with items of a single schema type. If the array's items have + * different schemas, an {@link UnsupportedOperationException} will be thrown.

s + * + */ +public class RandomArrayGenerator extends RandomGenerator { + + @Override + public boolean handles(OasSchema other) { + return OasModelHelper.isArrayType(other); + } + + @Override + void generate(RandomContext randomContext, OasSchema schema) { + Object items = schema.items; + + if (items instanceof OasSchema itemsSchema) { + createRandomArrayValueWithSchemaItem(randomContext, schema, itemsSchema); + } else { + throw new UnsupportedOperationException( + "Random array creation for an array with items having different schema is currently not supported!"); + } + } + + private static void createRandomArrayValueWithSchemaItem(RandomContext randomContext, + OasSchema schema, + OasSchema itemsSchema) { + + Number minItems = schema.minItems != null ? schema.minItems : 1; + Number maxItems = schema.maxItems != null ? schema.maxItems : 10; + + int nItems = ThreadLocalRandom.current() + .nextInt(minItems.intValue(), maxItems.intValue() + 1); + + randomContext.getRandomModelBuilder().array(() -> { + for (int i = 0; i < nItems; i++) { + randomContext.generate(itemsSchema); + } + }); + } +} diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomCompositeGenerator.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomCompositeGenerator.java new file mode 100644 index 0000000000..6a7877ca39 --- /dev/null +++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomCompositeGenerator.java @@ -0,0 +1,74 @@ +package org.citrusframework.openapi.random; + +import static org.springframework.util.CollectionUtils.isEmpty; + +import io.apicurio.datamodels.openapi.models.OasSchema; +import io.apicurio.datamodels.openapi.v3.models.Oas30Schema; +import java.util.HashMap; +import java.util.List; +import java.util.Map; +import java.util.concurrent.ThreadLocalRandom; +import org.citrusframework.openapi.model.OasModelHelper; + +/** + * A generator for producing random composite schemas based on an OpenAPI schema. This class extends + * the {@link RandomGenerator} and provides a specific implementation for generating composite schemas + * with constraints defined in the schema. + * + *

The generator supports composite schemas, which include `allOf`, `anyOf`, and `oneOf` constructs.

+ */ +public class RandomCompositeGenerator extends RandomGenerator { + + @Override + public boolean handles(OasSchema other) { + return OasModelHelper.isCompositeSchema(other); + } + + @Override + void generate(RandomContext randomContext, OasSchema schema) { + + if (!isEmpty(schema.allOf)) { + createAllOff(randomContext, schema); + } else if (schema instanceof Oas30Schema oas30Schema && !isEmpty(oas30Schema.anyOf)) { + createAnyOf(randomContext, oas30Schema); + } else if (schema instanceof Oas30Schema oas30Schema && !isEmpty(oas30Schema.oneOf)) { + createOneOf(randomContext, oas30Schema.oneOf); + } + } + + private static void createOneOf(RandomContext randomContext, List schemas) { + int schemaIndex = ThreadLocalRandom.current().nextInt(schemas.size()); + randomContext.getRandomModelBuilder().object(() -> + randomContext.generate(schemas.get(schemaIndex))); + } + + private static void createAnyOf(RandomContext randomContext, Oas30Schema schema) { + + randomContext.getRandomModelBuilder().object(() -> { + boolean anyAdded = false; + for (OasSchema oneSchema : schema.anyOf) { + if (ThreadLocalRandom.current().nextBoolean()) { + randomContext.generate(oneSchema); + anyAdded = true; + } + } + + // Add at least one + if (!anyAdded) { + createOneOf(randomContext, schema.anyOf); + } + }); + } + + private static Map createAllOff(RandomContext randomContext, OasSchema schema) { + Map allOf = new HashMap<>(); + + randomContext.getRandomModelBuilder().object(() -> { + for (OasSchema oneSchema : schema.allOf) { + randomContext.generate(oneSchema); + } + }); + + return allOf; + } +} diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomConfiguration.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomConfiguration.java new file mode 100644 index 0000000000..c986a16eb3 --- /dev/null +++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomConfiguration.java @@ -0,0 +1,63 @@ +package org.citrusframework.openapi.random; + +import static org.citrusframework.openapi.OpenApiConstants.FORMAT_DATE; +import static org.citrusframework.openapi.OpenApiConstants.FORMAT_DATE_TIME; +import static org.citrusframework.openapi.OpenApiConstants.FORMAT_UUID; +import static org.citrusframework.openapi.OpenApiConstants.TYPE_BOOLEAN; +import static org.citrusframework.openapi.OpenApiConstants.TYPE_STRING; +import static org.citrusframework.openapi.random.RandomGenerator.ANY; +import static org.citrusframework.openapi.random.RandomGenerator.NULL_GENERATOR; +import static org.citrusframework.openapi.random.RandomGeneratorBuilder.builder; + +import io.apicurio.datamodels.openapi.models.OasSchema; +import java.util.ArrayList; +import java.util.Collections; +import java.util.List; + +/** + * Configuration class that initializes and manages a list of random generators + * for producing random data based on an OpenAPI schema. This class is a singleton + * and provides a static instance {@code RANDOM_CONFIGURATION} for global access. + */ +public class RandomConfiguration { + + private static final String EMAIL_PATTERN = "[a-z]{5,15}\\.?[a-z]{5,15}\\@[a-z]{5,15}\\.[a-z]{2}"; + private static final String URI_PATTERN = "((http|https)://[a-zA-Z0-9-]+(\\.[a-zA-Z]{2,})+(/[a-zA-Z0-9-]+){1,6})|(file:///[a-zA-Z0-9-]+(/[a-zA-Z0-9-]+){1,6})"; + private static final String HOSTNAME_PATTERN = "(([a-zA-Z0-9]|[a-zA-Z0-9][a-zA-Z0-9\\-]*[a-zA-Z0-9])\\.)*([A-Za-z0-9]|[A-Za-z0-9][A-Za-z0-9\\-]*[A-Za-z0-9])"; + private static final String IPV4_PATTERN = "(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\\.(25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)"; + private static final String IPV6_PATTERN = "(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))"; + + private final List randomGenerators; + + public static final RandomConfiguration RANDOM_CONFIGURATION = new RandomConfiguration(); + + private RandomConfiguration() { + List generators = new ArrayList<>(); + + // Note that the order of generators in the list is relevant, as the list is traversed from start to end, to find the first matching generator for a schema, and some generators match for less significant schemas. + generators.add(new RandomEnumGenerator()); + generators.add(builder(TYPE_STRING, FORMAT_DATE).build((randomContext, schema) -> randomContext.getRandomModelBuilder().appendSimpleQuoted("citrus:currentDate('yyyy-MM-dd')"))); + generators.add(builder(TYPE_STRING, FORMAT_DATE_TIME).build((randomContext, schema) -> randomContext.getRandomModelBuilder().appendSimpleQuoted("citrus:currentDate('yyyy-MM-dd'T'hh:mm:ssZ')"))); + generators.add(builder(TYPE_STRING, FORMAT_UUID).build((randomContext, schema) -> randomContext.getRandomModelBuilder().appendSimpleQuoted("citrus:randomUUID()"))); + generators.add(builder(TYPE_STRING, "email").build((randomContext, schema) -> randomContext.getRandomModelBuilder().appendSimpleQuoted("citrus:randomPattern('"+EMAIL_PATTERN+"')"))); + generators.add(builder(TYPE_STRING, "uri").build((randomContext, schema) -> randomContext.getRandomModelBuilder().appendSimpleQuoted("citrus:randomPattern('"+URI_PATTERN+"')"))); + generators.add(builder(TYPE_STRING, "hostname").build((randomContext, schema) -> randomContext.getRandomModelBuilder().appendSimpleQuoted("citrus:randomPattern('"+HOSTNAME_PATTERN+"')"))); + generators.add(builder(TYPE_STRING, "ipv4").build((randomContext, schema) -> randomContext.getRandomModelBuilder().appendSimpleQuoted("citrus:randomPattern('"+IPV4_PATTERN+"')"))); + generators.add(builder(TYPE_STRING,"ipv6").build((randomContext, schema) -> randomContext.getRandomModelBuilder().appendSimpleQuoted("citrus:randomPattern('"+IPV6_PATTERN+"')"))); + generators.add(builder().withType(TYPE_STRING).withPattern(ANY).build((randomContext, schema) -> randomContext.getRandomModelBuilder().appendSimpleQuoted("citrus:randomPattern('"+schema.pattern+"')"))); + generators.add(builder().withType(TYPE_BOOLEAN).build((randomContext, schema) -> randomContext.getRandomModelBuilder().appendSimple("citrus:randomEnumValue('true', 'false')"))); + generators.add(new RandomStringGenerator()); + generators.add(new RandomCompositeGenerator()); + generators.add(new RandomNumberGenerator()); + generators.add(new RandomObjectGenerator()); + generators.add(new RandomArrayGenerator()); + + randomGenerators = Collections.unmodifiableList(generators); + } + + public RandomGenerator getGenerator(OasSchema oasSchema) { + return randomGenerators.stream().filter(generator -> generator.handles(oasSchema)) + .findFirst() + .orElse(NULL_GENERATOR); + } +} diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomContext.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomContext.java new file mode 100644 index 0000000000..978d3b666b --- /dev/null +++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomContext.java @@ -0,0 +1,120 @@ +package org.citrusframework.openapi.random; + +import static org.citrusframework.openapi.random.RandomConfiguration.RANDOM_CONFIGURATION; + +import io.apicurio.datamodels.openapi.models.OasSchema; +import java.util.Collections; +import java.util.HashMap; +import java.util.Map; +import java.util.function.Function; +import org.citrusframework.openapi.OpenApiSpecification; +import org.citrusframework.openapi.model.OasModelHelper; + +/** + * Context class for generating random values based on an OpenAPI specification. + * This class manages the state and configuration needed to generate random values + * for various schemas defined in the OpenAPI specification. + */ +public class RandomContext { + + private final OpenApiSpecification specification; + + private Map schemaDefinitions; + + private final RandomModelBuilder randomModelBuilder; + + /** + * Cache for storing variable during random value generation. + */ + private final Map contextVariables = new HashMap<>(); + + /** + * Constructs a default RandomContext backed by no specification. Note, that this context can not + * resolve referenced schemas, as no specification is available. + * + */ + public RandomContext() { + this.randomModelBuilder = new RandomModelBuilder(false); + this.specification = null; + } + + /** + * Constructs a new RandomContext with the specified OpenAPI specification and quote option. + * + * @param specification the OpenAPI specification + * @param quote whether to quote the generated random values + */ + public RandomContext(OpenApiSpecification specification, boolean quote) { + this.specification = specification; + this.randomModelBuilder = new RandomModelBuilder(quote); + } + + /** + * Generates random values based on the specified schema. + * + * @param schema the schema to generate random values for + */ + public void generate(OasSchema schema) { + doGenerate(resolveSchema(schema)); + } + + void doGenerate(OasSchema resolvedSchema) { + RANDOM_CONFIGURATION.getGenerator(resolvedSchema).generate(this, resolvedSchema); + } + + /** + * Resolves a schema, handling reference schemas by fetching the referenced schema definition. + * + * @param schema the schema to resolve + * @return the resolved schema + */ + OasSchema resolveSchema(OasSchema schema) { + if (OasModelHelper.isReferenceType(schema)) { + if (schemaDefinitions == null) { + schemaDefinitions = getSchemaDefinitions(); + } + schema = schemaDefinitions.get(OasModelHelper.getReferenceName(schema.$ref)); + } + return schema; + } + + /** + * Returns the RandomModelBuilder associated with this context. + * + * @return the RandomModelBuilder + */ + public RandomModelBuilder getRandomModelBuilder() { + return randomModelBuilder; + } + + /** + * Returns the OpenAPI specification associated with this context. + * + * @return the OpenAPI specification + */ + public OpenApiSpecification getSpecification() { + return specification; + } + + /** + * Returns the schema definitions from the specified OpenAPI document. + * + * @return a map of schema definitions + */ + Map getSchemaDefinitions() { + return specification != null ?OasModelHelper.getSchemaDefinitions(specification.getOpenApiDoc(null)) : Collections.emptyMap(); + } + + /** + * Retrieves a context variable by key, computing its value if necessary using the provided mapping function. + * + * @param the type of the context variable + * @param key the key of the context variable + * @param mappingFunction the function to compute the value if it is not present + * @return the context variable value + */ + public T get(String key, Function mappingFunction) { + //noinspection unchecked + return (T) contextVariables.computeIfAbsent(key, mappingFunction); + } +} \ No newline at end of file diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/util/RandomElement.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomElement.java similarity index 98% rename from connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/util/RandomElement.java rename to connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomElement.java index 4a31733459..4c515a4256 100644 --- a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/util/RandomElement.java +++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomElement.java @@ -14,7 +14,7 @@ * limitations under the License. */ -package org.citrusframework.openapi.util; +package org.citrusframework.openapi.random; import java.util.ArrayList; import java.util.LinkedHashMap; diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomEnumGenerator.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomEnumGenerator.java new file mode 100644 index 0000000000..67b46e8be7 --- /dev/null +++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomEnumGenerator.java @@ -0,0 +1,25 @@ +package org.citrusframework.openapi.random; + +import io.apicurio.datamodels.openapi.models.OasSchema; +import java.util.List; +import java.util.stream.Collectors; + +public class RandomEnumGenerator extends RandomGenerator { + + + @Override + public boolean handles(OasSchema other) { + return other.enum_ != null; + } + + @Override + void generate(RandomContext randomContext, OasSchema schema) { + List anEnum = schema.enum_; + if (anEnum != null) { + String enumValues = schema.enum_.stream().map(value -> "'" + value + "'") + .collect(Collectors.joining(",")); + randomContext.getRandomModelBuilder().appendSimpleQuoted("citrus:randomEnumValue(%s)".formatted(enumValues)); + } + } + +} diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomGenerator.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomGenerator.java new file mode 100644 index 0000000000..9f74422e48 --- /dev/null +++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomGenerator.java @@ -0,0 +1,61 @@ +package org.citrusframework.openapi.random; + +import io.apicurio.datamodels.openapi.models.OasSchema; +import java.util.Objects; + +/** + * Abstract base class for generators that produce random data based on an OpenAPI schema. + * Subclasses must implement the {@link #generate} method to provide specific random data generation logic. + * + *

The class provides methods for determining if a generator can handle a given schema, + * based on the schema type, format, pattern, and enum constraints. + */ +public abstract class RandomGenerator { + + public static final String ANY = "$ANY$"; + + private final OasSchema schema; + + protected RandomGenerator() { + this.schema = null; + } + + protected RandomGenerator(OasSchema schema) { + this.schema = schema; + } + + public boolean handles(OasSchema other) { + if (other == null || schema == null) { + return false; + } + + if (ANY.equals(schema.type) || Objects.equals(schema.type, other.type)) { + if (schema.format != null) { + return (ANY.equals(schema.format) && other.format != null)|| Objects.equals(schema.format, other.format); + } + + if (schema.pattern != null) { + return (ANY.equals(schema.pattern) && other.pattern != null) || Objects.equals(schema.pattern, other.pattern); + } + + if (schema.enum_ != null && other.enum_ != null) { + return true; + } + + return true; + } + + return false; + } + + abstract void generate(RandomContext randomContext, OasSchema schema); + + public static final RandomGenerator NULL_GENERATOR = new RandomGenerator() { + + @Override + void generate(RandomContext randomContext, OasSchema schema) { + // Do nothing + } + }; + +} \ No newline at end of file diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomGeneratorBuilder.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomGeneratorBuilder.java new file mode 100644 index 0000000000..8fbeac3ef4 --- /dev/null +++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomGeneratorBuilder.java @@ -0,0 +1,62 @@ +package org.citrusframework.openapi.random; + +import io.apicurio.datamodels.openapi.models.OasSchema; +import io.apicurio.datamodels.openapi.v3.models.Oas30Schema; +import java.util.Collections; +import java.util.function.BiConsumer; + +/** + * A simple builder for building {@link java.util.random.RandomGenerator}s. + */ +public class RandomGeneratorBuilder { + + private final OasSchema schema = new Oas30Schema(); + + private RandomGeneratorBuilder() { + } + + static RandomGeneratorBuilder builder() { + return new RandomGeneratorBuilder(); + } + + static RandomGeneratorBuilder builder(String type, String format) { + return new RandomGeneratorBuilder().with(type, format); + } + + RandomGeneratorBuilder with(String type, String format) { + schema.type = type; + schema.format = format; + return this; + } + + + RandomGeneratorBuilder withType(String type) { + schema.type = type; + return this; + } + + RandomGeneratorBuilder withFormat(String format) { + schema.format = format; + return this; + } + + RandomGeneratorBuilder withPattern(String pattern) { + schema.pattern = pattern; + return this; + } + + RandomGeneratorBuilder withEnum() { + schema.enum_ = Collections.emptyList(); + return this; + } + + RandomGenerator build(BiConsumer consumer) { + return new RandomGenerator(schema) { + @Override + void generate(RandomContext randomContext, OasSchema schema) { + consumer.accept(randomContext, schema); + } + }; + } + +} \ No newline at end of file diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/util/RandomModelBuilder.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomModelBuilder.java similarity index 62% rename from connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/util/RandomModelBuilder.java rename to connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomModelBuilder.java index 43346b388a..c2ff6bbfea 100644 --- a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/util/RandomModelBuilder.java +++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomModelBuilder.java @@ -14,22 +14,21 @@ * limitations under the License. */ -package org.citrusframework.openapi.util; +package org.citrusframework.openapi.random; import java.util.ArrayDeque; import java.util.Deque; -import org.citrusframework.openapi.util.RandomElement.RandomList; -import org.citrusframework.openapi.util.RandomElement.RandomObject; -import org.citrusframework.openapi.util.RandomElement.RandomValue; +import org.citrusframework.openapi.random.RandomElement.RandomList; +import org.citrusframework.openapi.random.RandomElement.RandomObject; +import org.citrusframework.openapi.random.RandomElement.RandomValue; /** - * RandomModelBuilder is a class for building random JSON models. It supports adding - * simple values, objects, properties, and arrays to the JSON structure. The final - * model can be converted to a JSON string using the `writeToJson` method. I + * RandomModelBuilder is a class for building random JSON models. It supports adding simple values, + * objects, properties, and arrays to the JSON structure. The final model can be converted to a JSON + * string using the `writeToJson` method. I *

- * The builder is able to build nested structures and can also handle native string, - * number, and boolean elements, represented as functions for later dynamic string - * conversion by Citrus. + * The builder is able to build nested structures and can also handle native string, number, and + * boolean elements, represented as functions for later dynamic string conversion by Citrus. *

* Example usage: * 

@@ -48,22 +47,45 @@ public class RandomModelBuilder {
 
     final Deque deque = new ArrayDeque<>();
 
-    public RandomModelBuilder() {
+    private final boolean quote;
+
+    /**
+     * Creates a {@link RandomModelBuilder} in respective quoting mode.
+     * Quoting should be activated in case an object is created by the builder. In this case,
+     * all properties added by respective "quoted" methods, will be quoted.
+     *
+     * @param quote whether to run the builder in quoting mode or not.
+     */
+    public RandomModelBuilder(boolean quote) {
         deque.push(new RandomValue());
+        this.quote = quote;
     }
 
-    public String toString() {
+    public String write() {
         return RandomModelWriter.toString(this);
     }
 
-    public void appendSimple(String nativeValue) {
+    /**
+     * Append the simpleValue as is, no quoting
+     */
+    public void appendSimple(String simpleValue) {
         if (deque.isEmpty()) {
-            deque.push(new RandomValue(nativeValue));
+            deque.push(new RandomValue(simpleValue));
         } else {
-            deque.peek().push(nativeValue);
+            deque.peek().push(simpleValue);
         }
     }
 
+    /**
+     * If the builder is in quoting mode, the native value will be quoted, otherwise it will be
+     * added as ist.
+     *s
+     * @param simpleValue
+     */
+    public void appendSimpleQuoted(String simpleValue) {
+        appendSimple(quote(simpleValue));
+    }
+
     public void object(Runnable objectBuilder) {
         if (deque.isEmpty()) {
             throwIllegalState();
@@ -106,4 +128,8 @@ public void array(Runnable arrayBuilder) {
         deque.pop();
     }
 
+    public String quote(String text) {
+        return quote ? String.format("\"%s\"", text) : text;
+    }
+
 }
diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/util/RandomModelWriter.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomModelWriter.java
similarity index 97%
rename from connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/util/RandomModelWriter.java
rename to connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomModelWriter.java
index 11960d0973..2c37e621e5 100644
--- a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/util/RandomModelWriter.java
+++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomModelWriter.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.citrusframework.openapi.util;
+package org.citrusframework.openapi.random;
 
 import static org.citrusframework.util.StringUtils.trimTrailingComma;
 
@@ -22,7 +22,7 @@
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
-import org.citrusframework.openapi.util.RandomElement.RandomValue;
+import org.citrusframework.openapi.random.RandomElement.RandomValue;
 
 /**
  * Utility class for converting a {@link RandomModelBuilder} to its string representation.
diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomNumberGenerator.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomNumberGenerator.java
new file mode 100644
index 0000000000..a9c0742259
--- /dev/null
+++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomNumberGenerator.java
@@ -0,0 +1,155 @@
+package org.citrusframework.openapi.random;
+
+import static java.lang.Boolean.TRUE;
+import static java.lang.String.format;
+import static org.citrusframework.openapi.OpenApiConstants.TYPE_INTEGER;
+
+import io.apicurio.datamodels.openapi.models.OasSchema;
+import java.math.BigDecimal;
+import org.citrusframework.openapi.util.OpenApiUtils;
+
+/**
+ * A generator for producing random numbers based on an OpenAPI schema. This class extends the
+ * {@link RandomGenerator} and provides a specific implementation for generating random numbers with
+ * constraints defined in the schema.
+ *
+ * 
Supported constraints:
+ * 
    
+ *   
  • minimum: The minimum value for the generated number.
    • 
+ *   
  • maximum: The maximum value for the generated number.
    • 
+ *   
  • exclusiveMinimum: If true, the generated number will be strictly greater than the minimum.
    • 
+ *   
  • exclusiveMaximum: If true, the generated number will be strictly less than the maximum.
    • 
+ *   
  • multipleOf: The generated number will be a multiple of this value.
    • 
+ * 

+ *
+ * 
The generator supports generating numbers for both integer and floating-point types, including
+ * int32, int64, double, and float. This support
+ * extends to the multipleOf constraint, ensuring that the generated numbers can be precise
+ * multiples of the specified value.
+ *
+ * 
The generator determines the appropriate bounds and constraints based on the provided schema
+ * and generates a random number accordingly.
+ */
+public class RandomNumberGenerator extends RandomGenerator {
+
+    public static final BigDecimal THOUSAND = new BigDecimal(1000);
+    public static final BigDecimal HUNDRED = java.math.BigDecimal.valueOf(100);
+    public static final BigDecimal MINUS_THOUSAND = new BigDecimal(-1000);
+
+    @Override
+    public boolean handles(OasSchema other) {
+        return OpenApiUtils.isAnyNumberScheme(other);
+    }
+
+    @Override
+    void generate(RandomContext randomContext, OasSchema schema) {
+
+        boolean exclusiveMaximum = TRUE.equals(schema.exclusiveMaximum);
+        boolean exclusiveMinimum = TRUE.equals(schema.exclusiveMinimum);
+
+        BigDecimal[] bounds = determineBounds(schema);
+
+        BigDecimal minimum = bounds[0];
+        BigDecimal maximum = bounds[1];
+
+        if (schema.multipleOf != null) {
+            randomContext.getRandomModelBuilder().appendSimple(format(
+                "citrus:randomNumberGenerator('%d', '%s', '%s', '%s', '%s', '%s')",
+                determineDecimalPlaces(schema, minimum, maximum),
+                minimum,
+                maximum,
+                exclusiveMinimum,
+                exclusiveMaximum,
+                schema.multipleOf
+            ));
+        } else {
+            randomContext.getRandomModelBuilder().appendSimple(format(
+                "citrus:randomNumberGenerator('%d', '%s', '%s', '%s', '%s')",
+                determineDecimalPlaces(schema, minimum, maximum),
+                minimum,
+                maximum,
+                exclusiveMinimum,
+                exclusiveMaximum
+            ));
+        }
+    }
+
+    /**
+     * Determines the number of decimal places to use based on the given schema and
+     * minimum/maximum/multipleOf values. For integer types, it returns 0. For other types, it
+     * returns the maximum number of decimal places found between the minimum and maximum values,
+     * with a minimum of 2 decimal places.
+     */
+    private int determineDecimalPlaces(OasSchema schema, BigDecimal minimum,
+        BigDecimal maximum) {
+        if (TYPE_INTEGER.equals(schema.type)) {
+            return 0;
+        } else {
+            Number multipleOf = schema.multipleOf;
+            if (multipleOf != null) {
+                return findLeastSignificantDecimalPlace(new BigDecimal(multipleOf.toString()));
+            }
+
+            return Math.max(2, Math.max(findLeastSignificantDecimalPlace(minimum),
+                findLeastSignificantDecimalPlace(maximum)));
+
+        }
+    }
+
+    /**
+     * Determine some reasonable bounds for a random number
+     */
+    private static BigDecimal[] determineBounds(OasSchema schema) {
+        Number maximum = schema.maximum;
+        Number minimum = schema.minimum;
+        Number multipleOf = schema.multipleOf;
+
+        BigDecimal bdMinimum;
+        BigDecimal bdMaximum;
+
+        if (minimum == null && maximum == null) {
+            bdMinimum = MINUS_THOUSAND;
+            bdMaximum = THOUSAND;
+        } else if (minimum == null) {
+            bdMaximum = new BigDecimal(maximum.toString());
+            bdMinimum = calculateMinRelativeToMax(bdMaximum, multipleOf);
+        } else if (maximum == null) {
+            bdMinimum = new BigDecimal(minimum.toString());
+            bdMaximum = calculateMaxRelativeToMin(bdMinimum, multipleOf);
+        } else {
+            bdMinimum = new BigDecimal(minimum.toString());
+            bdMaximum = new BigDecimal(maximum.toString());
+        }
+
+        return new BigDecimal[]{bdMinimum, bdMaximum};
+    }
+
+    static BigDecimal calculateMinRelativeToMax(BigDecimal max, Number multipleOf) {
+        if (multipleOf != null) {
+            return max.subtract(new BigDecimal(multipleOf.toString()).abs().multiply(HUNDRED));
+        } else {
+            return max.subtract(max.multiply(BigDecimal.valueOf(2)).max(THOUSAND));
+        }
+    }
+
+    static BigDecimal calculateMaxRelativeToMin(BigDecimal min, Number multipleOf) {
+        if (multipleOf != null) {
+            return min.add(new BigDecimal(multipleOf.toString()).abs().multiply(HUNDRED));
+        } else {
+            return min.add(min.multiply(BigDecimal.valueOf(2)).max(THOUSAND));
+        }
+    }
+
+    int findLeastSignificantDecimalPlace(BigDecimal number) {
+        number = number.stripTrailingZeros();
+
+        String[] parts = number.toPlainString().split("\\.");
+
+        if (parts.length == 1) {
+            return 0;
+        }
+
+        return parts[1].length();
+    }
+
+}
diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomObjectGenerator.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomObjectGenerator.java
new file mode 100644
index 0000000000..8b7ef2b9d4
--- /dev/null
+++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomObjectGenerator.java
@@ -0,0 +1,58 @@
+package org.citrusframework.openapi.random;
+
+import io.apicurio.datamodels.openapi.models.OasSchema;
+import io.apicurio.datamodels.openapi.v3.models.Oas30Schema;
+import java.util.ArrayDeque;
+import java.util.Deque;
+import java.util.Map;
+import org.citrusframework.openapi.OpenApiConstants;
+import org.citrusframework.openapi.util.OpenApiUtils;
+
+/**
+ * A generator for producing random objects based on an OpenAPI schema. This class extends
+ * the {@link RandomGenerator} and provides a specific implementation for generating objects
+ * with properties defined in the schema.
+ *
+ * 
The generator supports object schemas and prevents recursion by keeping track of the
+ * schemas being processed.

+ */
+public class RandomObjectGenerator extends RandomGenerator {
+
+    private static final String OBJECT_STACK = "OBJECT_STACK";
+
+    private static final OasSchema OBJECT_SCHEMA = new Oas30Schema();
+
+    static {
+        OBJECT_SCHEMA.type = OpenApiConstants.TYPE_OBJECT;
+    }
+
+    public RandomObjectGenerator() {
+        super(OBJECT_SCHEMA);
+    }
+
+    @Override
+    void generate(RandomContext randomContext, OasSchema schema) {
+
+        Deque objectStack = randomContext.get(OBJECT_STACK, k -> new ArrayDeque<>());
+
+        if (objectStack.contains(schema)) {
+            // If we have already created this schema, we are very likely in a recursion and need to stop.
+            return;
+        }
+
+        objectStack.push(schema);
+        randomContext.getRandomModelBuilder().object(() -> {
+            if (schema.properties != null) {
+                for (Map.Entry entry : schema.properties.entrySet()) {
+                    if (randomContext.getSpecification().isGenerateOptionalFields() || OpenApiUtils.isRequired(schema,
+                        entry.getKey())) {
+                        randomContext.getRandomModelBuilder().property(entry.getKey(), () ->
+                            randomContext.generate(entry.getValue()));
+                    }
+                }
+            }
+        });
+        objectStack.pop();
+    }
+
+}
diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomStringGenerator.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomStringGenerator.java
new file mode 100644
index 0000000000..cc30c220eb
--- /dev/null
+++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/random/RandomStringGenerator.java
@@ -0,0 +1,39 @@
+package org.citrusframework.openapi.random;
+
+import io.apicurio.datamodels.openapi.models.OasSchema;
+import io.apicurio.datamodels.openapi.v3.models.Oas30Schema;
+import org.citrusframework.openapi.OpenApiConstants;
+
+/**
+ * A generator for producing random strings based on an OpenAPI schema.
+ * This class extends the {@link RandomGenerator} and provides a specific implementation
+ * for generating random strings with constraints defined in the schema.
+ */
+public class RandomStringGenerator extends RandomGenerator {
+
+    private static final OasSchema STRING_SCHEMA = new Oas30Schema();
+
+    static {
+        STRING_SCHEMA.type = OpenApiConstants.TYPE_STRING;
+    }
+
+    public RandomStringGenerator() {
+        super(STRING_SCHEMA);
+    }
+
+    @Override
+    void generate(RandomContext randomContext, OasSchema schema) {
+        int min = 1;
+        int max = 10;
+
+        if (schema.minLength != null && schema.minLength.intValue() > 0) {
+            min = schema.minLength.intValue();
+        }
+
+        if (schema.maxLength != null && schema.maxLength.intValue() > 0) {
+            max = schema.maxLength.intValue();
+        }
+
+        randomContext.getRandomModelBuilder().appendSimpleQuoted("citrus:randomString(%s,MIXED,true,%s)".formatted(max, min));
+    }
+}
diff --git a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/util/OpenApiUtils.java b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/util/OpenApiUtils.java
index dd6e48deb7..ae4008111a 100644
--- a/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/util/OpenApiUtils.java
+++ b/connectors/citrus-openapi/src/main/java/org/citrusframework/openapi/util/OpenApiUtils.java
@@ -62,4 +62,15 @@ public static boolean isAnyNumberScheme(OasSchema schema) {
         );
     }
 
+    /**
+     * Checks if given field name is in list of required fields for this schema.
+     */
+    public static boolean isRequired(OasSchema schema, String field) {
+        if (schema.required == null) {
+            return true;
+        }
+
+        return schema.required.contains(field);
+    }
+
 }
diff --git a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/OpenApiTestDataGeneratorTest.java b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/OpenApiTestDataGeneratorTest.java
index 59227c5cd7..6ac0dd9d60 100644
--- a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/OpenApiTestDataGeneratorTest.java
+++ b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/OpenApiTestDataGeneratorTest.java
@@ -72,64 +72,13 @@ public static void beforeClass() {
             .getSchemaValidator();
     }
 
-    @DataProvider(name = "findLeastSignificantDecimalPlace")
-    public static Object[][] findLeastSignificantDecimalPlace() {
-        return new Object[][]{
-            {new BigDecimal("1234.5678"), 4},
-            {new BigDecimal("123.567"), 3},
-            {new BigDecimal("123.56"), 2},
-            {new BigDecimal("123.5"), 1},
-            {new BigDecimal("123.0"), 0},
-            {new BigDecimal("123"), 0}
-        };
-    }
-
-    @Test(dataProvider = "findLeastSignificantDecimalPlace")
-    void findLeastSignificantDecimalPlace(BigDecimal number, int expectedSignificance) {
-        assertEquals(OpenApiTestDataGenerator.findLeastSignificantDecimalPlace(number),
-            expectedSignificance);
-    }
-
-    @DataProvider(name = "incrementToExclude")
-    public static Object[][] incrementToExclude() {
-        return new Object[][]{
-            {new BigDecimal("1234.678"), new BigDecimal("1234.679")},
-            {new BigDecimal("1234.78"), new BigDecimal("1234.79")},
-            {new BigDecimal("1234.8"), new BigDecimal("1234.9")},
-            {new BigDecimal("1234.0"), new BigDecimal("1235")},
-            {new BigDecimal("1234"), new BigDecimal("1235")},
-        };
-    }
-
-    @Test(dataProvider = "incrementToExclude")
-    void incrementToExclude(BigDecimal value, BigDecimal expectedValue) {
-        assertEquals(OpenApiTestDataGenerator.incrementToExclude(value), expectedValue);
-    }
-
-    @DataProvider(name = "decrementToExclude")
-    public static Object[][] decrementToExclude() {
-        return new Object[][]{
-            {new BigDecimal("1234.678"), new BigDecimal("1234.677")},
-            {new BigDecimal("1234.78"), new BigDecimal("1234.77")},
-            {new BigDecimal("1234.8"), new BigDecimal("1234.7")},
-            {new BigDecimal("1234.0"), new BigDecimal("1233")},
-            {new BigDecimal("1234"), new BigDecimal("1233")},
-        };
-    }
-
-    @Test(dataProvider = "decrementToExclude")
-    void decrementToExclude(BigDecimal value, BigDecimal expectedValue) {
-        assertEquals(OpenApiTestDataGenerator.decrementToExclude(value), expectedValue);
-    }
-
     @Test
     void testUuidFormat() {
         Oas30Schema stringSchema = new Oas30Schema();
         stringSchema.type = TYPE_STRING;
         stringSchema.format = FORMAT_UUID;
 
-        String uuidRandomValue = OpenApiTestDataGenerator.createRandomValueExpression(stringSchema,
-            false);
+        String uuidRandomValue = OpenApiTestDataGenerator.createRandomValueExpression(stringSchema);
         String finalUuidRandomValue = testContext.replaceDynamicContentInString(uuidRandomValue);
         Pattern uuidPattern = Pattern.compile(
             "[0-9a-f]{8}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{4}-[0-9a-f]{12}");
@@ -300,8 +249,7 @@ void testPattern() {
         String exp = "[0-3]([a-c]|[e-g]{1,2})";
         stringSchema.pattern = exp;
 
-        String randomValue = OpenApiTestDataGenerator.createRandomValueExpression(stringSchema,
-            false);
+        String randomValue = OpenApiTestDataGenerator.createRandomValueExpression(stringSchema);
         String finalRandomValue = testContext.replaceDynamicContentInString(randomValue);
         assertTrue(finalRandomValue.matches(exp),
             "Value '%s' does not match expression '%s'".formatted(finalRandomValue, exp));
@@ -315,18 +263,17 @@ public static Object[][] testPingApiSchemas() {
             //{"AnyOfType"},
             //{"AllOfType"},
             //{"PingRespType"},
-
             {"OneOfType"},
             {"StringsType"},
             {"DatesType"},
             {"NumbersType"},
-            {"MultipleOfType"},
             {"PingReqType"},
             {"Detail1"},
             {"Detail2"},
             {"BooleanType"},
             {"EnumType"},
             {"NestedType"},
+            {"MultipleOfType"},
             {"SimpleArrayType"},
             {"ComplexArrayType"},
             {"ArrayOfArraysType"},
@@ -354,13 +301,11 @@ void testPingApiSchemas(String schemaType) throws IOException {
             assertNotNull(randomValue);
 
             String finalJsonAsText = testContext.replaceDynamicContentInString(randomValue);
-
             try {
                 JsonNode valueNode = new ObjectMapper().readTree(
                     testContext.replaceDynamicContentInString(finalJsonAsText));
                 ValidationReport validationReport = schemaValidator.validate(() -> valueNode,
-                    swaggerValidationSchema,
-                    "response.body");
+                    swaggerValidationSchema, null);
 
                 String message = """
                 Json is invalid according to schema.
@@ -430,7 +375,7 @@ void testArrayMaxItems() {
 
         arraySchema.items = stringSchema;
 
-        Pattern pattern = Pattern.compile("citrus:randomString\\(1[0-5]\\)");
+        Pattern pattern = Pattern.compile("citrus:randomString\\(1[0-5],MIXED,true,10\\)");
         for (int i = 0; i < 100; i++) {
             String randomArrayValue = OpenApiTestDataGenerator.createOutboundPayload(arraySchema,
                 openApiSpecification);
@@ -447,61 +392,4 @@ void testArrayMaxItems() {
         }
     }
 
-    @Test
-    public void testLowestMultipleOf() {
-        assertEquals(OpenApiTestDataGenerator.lowestMultipleOf(BigDecimal.valueOf(-1000),
-            BigDecimal.valueOf(10)), BigDecimal.valueOf(-1000));
-        assertEquals(OpenApiTestDataGenerator.lowestMultipleOf(BigDecimal.valueOf(-1000),
-            BigDecimal.valueOf(-10)), BigDecimal.valueOf(-1000));
-        assertEquals(OpenApiTestDataGenerator.lowestMultipleOf(BigDecimal.valueOf(-1000),
-            BigDecimal.valueOf(11)), BigDecimal.valueOf(-990));
-        assertEquals(OpenApiTestDataGenerator.lowestMultipleOf(BigDecimal.valueOf(-1000),
-            BigDecimal.valueOf(-11)), BigDecimal.valueOf(-990));
-        assertEquals(OpenApiTestDataGenerator.lowestMultipleOf(BigDecimal.valueOf(-1000),
-            BigDecimal.valueOf(11.1234)), BigDecimal.valueOf(-989.9826));
-        assertEquals(OpenApiTestDataGenerator.lowestMultipleOf(BigDecimal.valueOf(-1000),
-            BigDecimal.valueOf(-11.1234)), BigDecimal.valueOf(-989.9826));
-
-        assertEquals(OpenApiTestDataGenerator.lowestMultipleOf(BigDecimal.valueOf(1000),
-            BigDecimal.valueOf(10)), BigDecimal.valueOf(1000));
-        assertEquals(OpenApiTestDataGenerator.lowestMultipleOf(BigDecimal.valueOf(1000),
-            BigDecimal.valueOf(-10)), BigDecimal.valueOf(1000));
-        assertEquals(OpenApiTestDataGenerator.lowestMultipleOf(BigDecimal.valueOf(1000),
-            BigDecimal.valueOf(11)), BigDecimal.valueOf(1001));
-        assertEquals(OpenApiTestDataGenerator.lowestMultipleOf(BigDecimal.valueOf(1000),
-            BigDecimal.valueOf(-11)), BigDecimal.valueOf(1001));
-        assertEquals(OpenApiTestDataGenerator.lowestMultipleOf(BigDecimal.valueOf(1000),
-            BigDecimal.valueOf(11.1234)), new BigDecimal("1001.1060"));
-        assertEquals(OpenApiTestDataGenerator.lowestMultipleOf(BigDecimal.valueOf(1000),
-            BigDecimal.valueOf(-11.1234)), new BigDecimal("1001.1060"));
-    }
-
-    @Test
-    public void testLargestMultipleOf() {
-        assertEquals(OpenApiTestDataGenerator.largestMultipleOf(BigDecimal.valueOf(-1000),
-            BigDecimal.valueOf(10)), BigDecimal.valueOf(-1000));
-        assertEquals(OpenApiTestDataGenerator.largestMultipleOf(BigDecimal.valueOf(-1000),
-            BigDecimal.valueOf(-10)), BigDecimal.valueOf(-1000));
-        assertEquals(OpenApiTestDataGenerator.largestMultipleOf(BigDecimal.valueOf(-1000),
-            BigDecimal.valueOf(11)), BigDecimal.valueOf(-1001));
-        assertEquals(OpenApiTestDataGenerator.largestMultipleOf(BigDecimal.valueOf(-1000),
-            BigDecimal.valueOf(-11)), BigDecimal.valueOf(-1001));
-        assertEquals(OpenApiTestDataGenerator.largestMultipleOf(BigDecimal.valueOf(-1000),
-            BigDecimal.valueOf(11.1234)), new BigDecimal("-1001.1060"));
-        assertEquals(OpenApiTestDataGenerator.largestMultipleOf(BigDecimal.valueOf(-1000),
-            BigDecimal.valueOf(-11.1234)), new BigDecimal("-1001.1060"));
-
-        assertEquals(OpenApiTestDataGenerator.largestMultipleOf(BigDecimal.valueOf(1000),
-            BigDecimal.valueOf(10)), BigDecimal.valueOf(1000));
-        assertEquals(OpenApiTestDataGenerator.largestMultipleOf(BigDecimal.valueOf(1000),
-            BigDecimal.valueOf(-10)), BigDecimal.valueOf(1000));
-        assertEquals(OpenApiTestDataGenerator.largestMultipleOf(BigDecimal.valueOf(1000),
-            BigDecimal.valueOf(11)), BigDecimal.valueOf(990));
-        assertEquals(OpenApiTestDataGenerator.largestMultipleOf(BigDecimal.valueOf(1000),
-            BigDecimal.valueOf(-11)), BigDecimal.valueOf(990));
-        assertEquals(OpenApiTestDataGenerator.largestMultipleOf(BigDecimal.valueOf(1000),
-            BigDecimal.valueOf(11.1234)), new BigDecimal("989.9826"));
-        assertEquals(OpenApiTestDataGenerator.largestMultipleOf(BigDecimal.valueOf(1000),
-            BigDecimal.valueOf(-11.1234)), new BigDecimal("989.9826"));
-    }
 }
diff --git a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/OasRandomConfigurationTest.java b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/OasRandomConfigurationTest.java
new file mode 100644
index 0000000000..43fd6d628b
--- /dev/null
+++ b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/OasRandomConfigurationTest.java
@@ -0,0 +1,179 @@
+package org.citrusframework.openapi.random;
+
+import io.apicurio.datamodels.openapi.models.OasSchema;
+import io.apicurio.datamodels.openapi.v3.models.Oas30Schema;
+import org.testng.annotations.BeforeClass;
+import org.testng.annotations.Test;
+
+import java.util.List;
+
+import static org.citrusframework.openapi.OpenApiConstants.*;
+import static org.testng.Assert.assertNotNull;
+import static org.testng.Assert.assertSame;
+import static org.testng.Assert.assertTrue;
+
+public class OasRandomConfigurationTest {
+
+    private RandomConfiguration randomConfiguration;
+
+    @BeforeClass
+    public void setUp() {
+        randomConfiguration = RandomConfiguration.RANDOM_CONFIGURATION;
+    }
+
+    @Test
+    public void testGetGeneratorForDateFormat() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = TYPE_STRING;
+        schema.format = FORMAT_DATE;
+
+        RandomGenerator generator = randomConfiguration.getGenerator(schema);
+        assertNotNull(generator);
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testGetGeneratorForDateTimeFormat() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = TYPE_STRING;
+        schema.format = FORMAT_DATE_TIME;
+
+        RandomGenerator generator = randomConfiguration.getGenerator(schema);
+        assertNotNull(generator);
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testGetGeneratorForUUIDFormat() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = TYPE_STRING;
+        schema.format = FORMAT_UUID;
+
+        RandomGenerator generator = randomConfiguration.getGenerator(schema);
+        assertNotNull(generator);
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testGetGeneratorForEmailFormat() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = TYPE_STRING;
+        schema.format = "email";
+
+        RandomGenerator generator = randomConfiguration.getGenerator(schema);
+        assertNotNull(generator);
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testGetGeneratorForURIFormat() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = TYPE_STRING;
+        schema.format = "uri";
+
+        RandomGenerator generator = randomConfiguration.getGenerator(schema);
+        assertNotNull(generator);
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testGetGeneratorForHostnameFormat() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = TYPE_STRING;
+        schema.format = "hostname";
+
+        RandomGenerator generator = randomConfiguration.getGenerator(schema);
+        assertNotNull(generator);
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testGetGeneratorForIPv4Format() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = TYPE_STRING;
+        schema.format = "ipv4";
+
+        RandomGenerator generator = randomConfiguration.getGenerator(schema);
+        assertNotNull(generator);
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testGetGeneratorForIPv6Format() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = TYPE_STRING;
+        schema.format = "ipv6";
+
+        RandomGenerator generator = randomConfiguration.getGenerator(schema);
+        assertNotNull(generator);
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testGetGeneratorForBooleanType() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = TYPE_BOOLEAN;
+
+        RandomGenerator generator = randomConfiguration.getGenerator(schema);
+        assertNotNull(generator);
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testGetGeneratorForStringType() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = TYPE_STRING;
+
+        RandomGenerator generator = randomConfiguration.getGenerator(schema);
+        assertNotNull(generator);
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testGetGeneratorForNumberType() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = "number";
+
+        RandomGenerator generator = randomConfiguration.getGenerator(schema);
+        assertNotNull(generator);
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testGetGeneratorForObjectType() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = "object";
+
+        RandomGenerator generator = randomConfiguration.getGenerator(schema);
+        assertNotNull(generator);
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testGetGeneratorForArrayType() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = "array";
+
+        RandomGenerator generator = randomConfiguration.getGenerator(schema);
+        assertNotNull(generator);
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testGetGeneratorForEnum() {
+        OasSchema schema = new Oas30Schema();
+        schema.enum_ = List.of("value1", "value2");
+
+        RandomGenerator generator = randomConfiguration.getGenerator(schema);
+        assertNotNull(generator);
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testGetGeneratorForNullSchema() {
+        OasSchema schema = new Oas30Schema();
+        RandomGenerator generator = randomConfiguration.getGenerator(schema);
+        assertNotNull(generator);
+        assertSame(generator, RandomGenerator.NULL_GENERATOR);
+    }
+}
diff --git a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomArrayGeneratorTest.java b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomArrayGeneratorTest.java
new file mode 100644
index 0000000000..c361e0f1f6
--- /dev/null
+++ b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomArrayGeneratorTest.java
@@ -0,0 +1,106 @@
+package org.citrusframework.openapi.random;
+
+import static org.mockito.Mockito.any;
+import static org.mockito.Mockito.atLeast;
+import static org.mockito.Mockito.atLeastOnce;
+import static org.mockito.Mockito.atMost;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import io.apicurio.datamodels.openapi.models.OasSchema;
+import io.apicurio.datamodels.openapi.v3.models.Oas30Schema;
+import org.citrusframework.openapi.OpenApiConstants;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.Test;
+
+public class RandomArrayGeneratorTest {
+
+    private RandomArrayGenerator generator;
+    private RandomContext mockContext;
+    private RandomModelBuilder builderSpy;
+
+    @BeforeMethod
+    public void setUp() {
+        generator = new RandomArrayGenerator();
+        mockContext = mock();
+
+        builderSpy = spy(new RandomModelBuilder(true));
+
+        when(mockContext.getRandomModelBuilder()).thenReturn(builderSpy);
+    }
+
+    @Test
+    public void testGenerateArrayWithDefaultItems() {
+        Oas30Schema schema = new Oas30Schema();
+        schema.type = OpenApiConstants.TYPE_ARRAY;
+
+        Oas30Schema itemsSchema = new Oas30Schema();
+        itemsSchema.type = OpenApiConstants.TYPE_STRING;
+        schema.items = itemsSchema;
+
+        generator.generate(mockContext, schema);
+
+        verify(builderSpy, atLeastOnce()).array(any());
+        verify(mockContext, atLeastOnce()).generate(any(OasSchema.class));
+    }
+
+    @Test
+    public void testGenerateArrayWithMinItems() {
+        Oas30Schema schema = new Oas30Schema();
+        schema.type = OpenApiConstants.TYPE_ARRAY;
+        schema.minItems = 5;
+
+        Oas30Schema itemsSchema = new Oas30Schema();
+        itemsSchema.type = OpenApiConstants.TYPE_STRING;
+        schema.items = itemsSchema;
+
+        generator.generate(mockContext, schema);
+
+        verify(builderSpy, atLeastOnce()).array(any());
+        verify(mockContext, atLeast(5)).generate(any(OasSchema.class));
+    }
+
+    @Test
+    public void testGenerateArrayWithMaxItems() {
+        Oas30Schema schema = new Oas30Schema();
+        schema.type = OpenApiConstants.TYPE_ARRAY;
+        schema.maxItems = 3;
+
+        Oas30Schema itemsSchema = new Oas30Schema();
+        itemsSchema.type = OpenApiConstants.TYPE_STRING;
+        schema.items = itemsSchema;
+
+        generator.generate(mockContext, schema);
+
+        verify(builderSpy, atLeastOnce()).array(any());
+        verify(mockContext, atMost(3)).generate(any(OasSchema.class));
+    }
+
+    @Test
+    public void testGenerateArrayWithMinMaxItems() {
+        Oas30Schema schema = new Oas30Schema();
+        schema.type = OpenApiConstants.TYPE_ARRAY;
+        schema.minItems = 2;
+        schema.maxItems = 5;
+
+        Oas30Schema itemsSchema = new Oas30Schema();
+        itemsSchema.type = OpenApiConstants.TYPE_STRING;
+        schema.items = itemsSchema;
+
+        generator.generate(mockContext, schema);
+
+        verify(builderSpy, atLeastOnce()).array(any());
+        verify(mockContext, atLeast(2)).generate(any(OasSchema.class));
+        verify(mockContext, atMost(5)).generate(any(OasSchema.class));
+    }
+
+    @Test(expectedExceptions = UnsupportedOperationException.class)
+    public void testGenerateArrayWithUnsupportedItems() {
+        Oas30Schema schema = new Oas30Schema();
+        schema.items = new Object(); // Unsupported items type
+
+        generator.generate(mockContext, schema);
+    }
+}
diff --git a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomCompositeGeneratorTest.java b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomCompositeGeneratorTest.java
new file mode 100644
index 0000000000..ab2da578e7
--- /dev/null
+++ b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomCompositeGeneratorTest.java
@@ -0,0 +1,90 @@
+package org.citrusframework.openapi.random;
+
+import static org.mockito.Mockito.any;
+import static org.mockito.Mockito.assertArg;
+import static org.mockito.Mockito.atLeast;
+import static org.mockito.Mockito.atLeastOnce;
+import static org.mockito.Mockito.atMost;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+import static org.testng.Assert.assertTrue;
+
+import io.apicurio.datamodels.openapi.models.OasSchema;
+import io.apicurio.datamodels.openapi.v3.models.Oas30Schema;
+import java.util.Collections;
+import java.util.List;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.Test;
+
+public class RandomCompositeGeneratorTest {
+
+    private RandomCompositeGenerator generator;
+    private RandomContext mockContext;
+    private RandomModelBuilder builderSpy;
+
+    @BeforeMethod
+    public void setUp() {
+        generator = new RandomCompositeGenerator();
+        mockContext = mock(RandomContext.class);
+        builderSpy = spy(new RandomModelBuilder(true));
+
+        when(mockContext.getRandomModelBuilder()).thenReturn(builderSpy);
+    }
+
+    @Test
+    public void testHandlesCompositeSchema() {
+        Oas30Schema schema = new Oas30Schema();
+        schema.allOf = Collections.singletonList(new Oas30Schema());
+
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testGenerateAllOf() {
+        Oas30Schema schema = new Oas30Schema();
+        schema.allOf = List.of(new Oas30Schema(), new Oas30Schema(), new Oas30Schema());
+
+        generator.generate(mockContext, schema);
+
+        verify(builderSpy).object(any());
+        verify(mockContext).generate(schema.allOf.get(0));
+        verify(mockContext).generate(schema.allOf.get(1));
+        verify(mockContext).generate(schema.allOf.get(2));
+    }
+
+    @Test
+    public void testGenerateAnyOf() {
+        Oas30Schema schema = new Oas30Schema();
+        schema.anyOf = List.of(new Oas30Schema(), new Oas30Schema(), new Oas30Schema());
+
+        generator.generate(mockContext, schema);
+
+        verify(builderSpy).object(any());
+        verify(mockContext, atLeast(1)).generate(assertArg(arg -> schema.anyOf.contains(arg)));
+        verify(mockContext, atMost(3)).generate(assertArg(arg -> schema.anyOf.contains(arg)));
+    }
+
+    @Test
+    public void testGenerateOneOf() {
+        Oas30Schema schema = new Oas30Schema();
+        schema.oneOf = List.of(new Oas30Schema(), new Oas30Schema(), new Oas30Schema());
+
+        generator.generate(mockContext, schema);
+
+        verify(builderSpy, atLeastOnce()).object(any());
+        verify(mockContext).generate(any(OasSchema.class));
+    }
+
+    @Test
+    public void testGenerateWithNoCompositeSchema() {
+        Oas30Schema schema = new Oas30Schema();
+
+        generator.generate(mockContext, schema);
+
+        verify(builderSpy, never()).object(any());
+        verify(mockContext, never()).generate(any(OasSchema.class));
+    }
+}
diff --git a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomContextTest.java b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomContextTest.java
new file mode 100644
index 0000000000..78d47bb52e
--- /dev/null
+++ b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomContextTest.java
@@ -0,0 +1,76 @@
+package org.citrusframework.openapi.random;
+
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.assertNotNull;
+import static org.testng.Assert.assertSame;
+
+import io.apicurio.datamodels.openapi.models.OasSchema;
+import io.apicurio.datamodels.openapi.v3.models.Oas30Schema;
+import java.util.HashMap;
+import java.util.Map;
+import org.citrusframework.openapi.OpenApiSpecification;
+import org.springframework.test.util.ReflectionTestUtils;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.Test;
+
+public class RandomContextTest {
+
+    private OpenApiSpecification specificationMock;
+
+    private RandomContext randomContext;
+
+    private Map schemaDefinitions;
+
+    @BeforeMethod
+    public void setUp() {
+        RandomModelBuilder randomModelBuilderMock = mock();
+        specificationMock = mock();
+
+        schemaDefinitions =new HashMap<>();
+
+        randomContext = spy(new RandomContext(specificationMock, true));
+        ReflectionTestUtils.setField(randomContext, "randomModelBuilder", randomModelBuilderMock);
+
+        doReturn(schemaDefinitions).when(randomContext).getSchemaDefinitions();
+    }
+
+    @Test
+    public void testGenerateWithResolvedSchema() {
+        OasSchema oasSchema = new Oas30Schema();
+        randomContext.generate(oasSchema);
+        verify(randomContext).doGenerate(oasSchema);
+    }
+
+    @Test
+    public void testGenerateWithReferencedSchema() {
+        OasSchema referencedSchema = new Oas30Schema();
+        schemaDefinitions.put("reference", referencedSchema);
+        OasSchema oasSchema = new Oas30Schema();
+        oasSchema.$ref = "reference";
+
+        randomContext.generate(oasSchema);
+        verify(randomContext).doGenerate(referencedSchema);
+    }
+
+    @Test
+    public void testGetRandomModelBuilder() {
+        assertNotNull(randomContext.getRandomModelBuilder());
+    }
+
+    @Test
+    public void testGetSpecification() {
+        assertEquals(randomContext.getSpecification(), specificationMock);
+    }
+
+    @Test
+    public void testCacheVariable() {
+        HashMap cachedValue1 = randomContext.get("testKey", k ->  new HashMap<>());
+        HashMap cachedValue2 = randomContext.get("testKey", k ->  new HashMap<>());
+
+        assertSame(cachedValue1, cachedValue2);
+    }
+}
diff --git a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/util/RandomElementTest.java b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomElementTest.java
similarity index 98%
rename from connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/util/RandomElementTest.java
rename to connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomElementTest.java
index 2add7086c8..0f17bd143e 100644
--- a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/util/RandomElementTest.java
+++ b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomElementTest.java
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package org.citrusframework.openapi.util;
+package org.citrusframework.openapi.random;
 
 import static org.testng.Assert.assertEquals;
 
diff --git a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomEnumGeneratorTest.java b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomEnumGeneratorTest.java
new file mode 100644
index 0000000000..8d4d7a14e9
--- /dev/null
+++ b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomEnumGeneratorTest.java
@@ -0,0 +1,77 @@
+package org.citrusframework.openapi.random;
+
+import static org.mockito.Mockito.anyString;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+import static org.testng.Assert.assertFalse;
+import static org.testng.Assert.assertTrue;
+
+import io.apicurio.datamodels.openapi.models.OasSchema;
+import java.util.List;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.Test;
+
+public class RandomEnumGeneratorTest {
+
+    private RandomEnumGenerator generator;
+    private RandomContext mockContext;
+    private RandomModelBuilder mockBuilder;
+    private OasSchema mockSchema;
+
+    @BeforeMethod
+    public void setUp() {
+        generator = new RandomEnumGenerator();
+        mockContext = mock(RandomContext.class);
+        mockBuilder = mock(RandomModelBuilder.class);
+        mockSchema = mock(OasSchema.class);
+
+        when(mockContext.getRandomModelBuilder()).thenReturn(mockBuilder);
+    }
+
+    @Test
+    public void testHandlesWithEnum() {
+        mockSchema.enum_ = List.of("value1", "value2", "value3");
+
+        boolean result = generator.handles(mockSchema);
+
+        assertTrue(result);
+    }
+
+    @Test
+    public void testHandlesWithoutEnum() {
+        mockSchema.enum_ = null;
+
+        boolean result = generator.handles(mockSchema);
+
+        assertFalse(result);
+    }
+
+    @Test
+    public void testGenerateWithEnum() {
+        mockSchema.enum_ = List.of("value1", "value2", "value3");
+
+        generator.generate(mockContext, mockSchema);
+
+        verify(mockBuilder).appendSimpleQuoted("citrus:randomEnumValue('value1','value2','value3')");
+    }
+
+    @Test
+    public void testGenerateWithEmptyEnum() {
+        mockSchema.enum_ = List.of();
+
+        generator.generate(mockContext, mockSchema);
+
+        verify(mockBuilder).appendSimpleQuoted("citrus:randomEnumValue()");
+    }
+
+    @Test
+    public void testGenerateWithNullEnum() {
+        mockSchema.enum_ = null;
+
+        generator.generate(mockContext, mockSchema);
+
+        verify(mockBuilder, never()).appendSimpleQuoted(anyString());
+    }
+}
diff --git a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomGeneratorBuilderTest.java b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomGeneratorBuilderTest.java
new file mode 100644
index 0000000000..01d1c253e6
--- /dev/null
+++ b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomGeneratorBuilderTest.java
@@ -0,0 +1,92 @@
+package org.citrusframework.openapi.random;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.assertNotNull;
+import static org.testng.Assert.assertTrue;
+
+import io.apicurio.datamodels.openapi.models.OasSchema;
+import java.util.function.BiConsumer;
+import org.springframework.test.util.ReflectionTestUtils;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.Test;
+
+
+public class RandomGeneratorBuilderTest {
+
+    private BiConsumer consumerMock;
+    private RandomContext contextMock;
+    private OasSchema schemaMock;
+
+    @BeforeMethod
+    public void setUp() {
+        consumerMock = mock();
+        contextMock = mock();
+        schemaMock = mock();
+    }
+
+    @Test
+    public void testBuilderWithTypeAndFormat() {
+        String type = "type1";
+        String format = "format1";
+
+        RandomGenerator generator = RandomGeneratorBuilder.builder(type, format).build(consumerMock);
+        OasSchema schema = (OasSchema) ReflectionTestUtils.getField(generator, "schema");
+        assertNotNull(schema);
+        assertEquals(schema.type, type);
+        assertEquals(schema.format, format);
+    }
+
+    @Test
+    public void testBuilderWithType() {
+        String type = "type1";
+
+        RandomGenerator generator = RandomGeneratorBuilder.builder().withType(type).build(
+            consumerMock);
+        OasSchema schema = (OasSchema) ReflectionTestUtils.getField(generator, "schema");
+        assertNotNull(schema);
+        assertEquals(schema.type, type);
+    }
+
+    @Test
+    public void testBuilderWithFormat() {
+        String format = "format1";
+
+        RandomGenerator generator = RandomGeneratorBuilder.builder().withFormat(format).build(
+            consumerMock);
+        OasSchema schema = (OasSchema) ReflectionTestUtils.getField(generator, "schema");
+        assertNotNull(schema);
+        assertEquals(schema.format, format);
+    }
+
+    @Test
+    public void testBuilderWithPattern() {
+        String pattern = "pattern1";
+
+        RandomGenerator generator = RandomGeneratorBuilder.builder().withPattern(pattern).build(
+            consumerMock);
+        OasSchema schema = (OasSchema) ReflectionTestUtils.getField(generator, "schema");
+        assertNotNull(schema);
+        assertEquals(schema.pattern, pattern);
+    }
+
+    @Test
+    public void testBuilderWithEnum() {
+        RandomGenerator generator = RandomGeneratorBuilder.builder().withEnum().build(consumerMock);
+        OasSchema schema = (OasSchema) ReflectionTestUtils.getField(generator, "schema");
+        assertNotNull(schema);
+        assertNotNull(schema.enum_);
+        assertTrue(schema.enum_.isEmpty());
+    }
+
+    @Test
+    public void testBuildGenerator() {
+        RandomGenerator generator = RandomGeneratorBuilder.builder().build(consumerMock);
+
+        generator.generate(contextMock, schemaMock);
+
+        verify(consumerMock).accept(contextMock, schemaMock);
+    }
+
+}
diff --git a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomGeneratorTest.java b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomGeneratorTest.java
new file mode 100644
index 0000000000..c788fff730
--- /dev/null
+++ b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomGeneratorTest.java
@@ -0,0 +1,152 @@
+package org.citrusframework.openapi.random;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.testng.Assert.assertFalse;
+import static org.testng.Assert.assertTrue;
+
+import io.apicurio.datamodels.openapi.models.OasSchema;
+import io.apicurio.datamodels.openapi.v3.models.Oas30Schema;
+import java.util.List;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.Test;
+
+public class RandomGeneratorTest {
+
+    private RandomGenerator generator;
+    private OasSchema mockSchema;
+
+    @BeforeMethod
+    public void setUp() {
+        mockSchema = mock(OasSchema.class);
+        generator = new RandomGenerator(mockSchema) {
+            @Override
+            void generate(RandomContext randomContext, OasSchema schema) {
+                // Implementation not needed for this test
+            }
+        };
+    }
+
+    @Test
+    public void testHandlesWithMatchingTypeAndFormat() {
+        OasSchema otherSchema = new Oas30Schema();
+        otherSchema.type = "type1";
+        otherSchema.format = "format1";
+
+        mockSchema.type = "type1";
+        mockSchema.format = "format1";
+
+        assertTrue(generator.handles(otherSchema));
+    }
+
+    @Test
+    public void testHandlesWithTypeAny() {
+        OasSchema otherSchema = new Oas30Schema();
+        otherSchema.type = "type1";
+        otherSchema.format = "format1";
+
+        mockSchema.type = RandomGenerator.ANY;
+        mockSchema.format = "format1";
+
+        assertTrue(generator.handles(otherSchema));
+    }
+
+    @Test
+    public void testHandlesWithFormatAny() {
+        OasSchema otherSchema = new Oas30Schema();
+        otherSchema.type = "type1";
+        otherSchema.format = "format1";
+
+        mockSchema.type = "type1";
+        mockSchema.format = RandomGenerator.ANY;
+
+        assertTrue(generator.handles(otherSchema));
+    }
+
+    @Test
+    public void testHandlesWithPatternAny() {
+        OasSchema otherSchema = new Oas30Schema();
+        otherSchema.type = "type1";
+        otherSchema.pattern = "pattern1";
+
+        mockSchema.type = "type1";
+        mockSchema.pattern = RandomGenerator.ANY;
+
+        assertTrue(generator.handles(otherSchema));
+    }
+
+    @Test
+    public void testHandlesWithMatchingPattern() {
+        OasSchema otherSchema = new Oas30Schema();
+        otherSchema.type = "type1";
+        otherSchema.pattern = "pattern1";
+
+        mockSchema.type = "type1";
+        mockSchema.pattern = "pattern1";
+
+        assertTrue(generator.handles(otherSchema));
+    }
+
+    @Test
+    public void testHandlesWithMatchingEnum() {
+        OasSchema otherSchema = new Oas30Schema();
+        otherSchema.type = "type1";
+        otherSchema.enum_ = List.of("value1", "value2");
+
+        mockSchema.type = "type1";
+        mockSchema.enum_ = List.of("value1", "value2");
+
+        assertTrue(generator.handles(otherSchema));
+    }
+
+    @Test
+    public void testHandlesWithNonMatchingType() {
+        OasSchema otherSchema = new Oas30Schema();
+        otherSchema.type = "type2";
+        otherSchema.format = "format1";
+
+        mockSchema.type = "type1";
+        mockSchema.format = "format1";
+
+        assertFalse(generator.handles(otherSchema));
+    }
+
+    @Test
+    public void testHandlesWithNonMatchingFormat() {
+        OasSchema otherSchema = new Oas30Schema();
+        otherSchema.type = "type1";
+        otherSchema.format = "format2";
+
+        mockSchema.type = "type1";
+        mockSchema.format = "format1";
+
+        assertFalse(generator.handles(otherSchema));
+    }
+
+    @Test
+    public void testHandlesWithNullSchema() {
+        assertFalse(generator.handles(null));
+    }
+
+    @Test
+    public void testHandlesWithNullGeneratorSchema() {
+        RandomGenerator generatorWithNullSchema = new RandomGenerator() {
+            @Override
+            void generate(RandomContext randomContext, OasSchema schema) {
+                // Do nothing
+            }
+        };
+
+        assertFalse(generatorWithNullSchema.handles(mockSchema));
+    }
+
+    @Test
+    public void testNullGenerator() {
+        RandomContext mockContext = mock(RandomContext.class);
+
+        RandomGenerator.NULL_GENERATOR.generate(mockContext, mockSchema);
+
+        verify(mockContext, never()).getRandomModelBuilder();
+    }
+}
diff --git a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/util/RandomModelBuilderTest.java b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomModelBuilderTest.java
similarity index 74%
rename from connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/util/RandomModelBuilderTest.java
rename to connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomModelBuilderTest.java
index f7570c2083..ef4deb3abc 100644
--- a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/util/RandomModelBuilderTest.java
+++ b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomModelBuilderTest.java
@@ -14,32 +14,58 @@
  * limitations under the License.
  */
 
-package org.citrusframework.openapi.util;
+package org.citrusframework.openapi.random;
 
+import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.expectThrows;
+
+import java.util.ArrayDeque;
+import org.springframework.test.util.ReflectionTestUtils;
 import org.testng.annotations.BeforeMethod;
 import org.testng.annotations.Test;
 
-import static org.testng.Assert.*;
-
 public class RandomModelBuilderTest {
 
     private RandomModelBuilder builder;
 
     @BeforeMethod
     public void setUp() {
-        builder = new RandomModelBuilder();
+        builder = new RandomModelBuilder(true);
     }
 
     @Test
     public void testInitialState() {
-        String text = builder.toString();
+        String text = builder.write();
         assertEquals(text, "");
     }
 
     @Test
     public void testAppendSimple() {
         builder.appendSimple("testValue");
-        String json = builder.toString();
+        String json = builder.write();
+        assertEquals(json, "testValue");
+    }
+
+    @Test
+    public void testAppendSimpleToEmptyQueue() {
+        ReflectionTestUtils.setField(builder, "deque", new ArrayDeque<>());
+        builder.appendSimple("testValue");
+        String json = builder.write();
+        assertEquals(json, "testValue");
+    }
+
+    @Test
+    public void testAppendSimpleQuoted() {
+        builder.appendSimpleQuoted("testValue");
+        String json = builder.write();
+        assertEquals(json, "\"testValue\"");
+    }
+
+    @Test
+    public void testAppendSimpleQuotedIfNotQuoting() {
+        ReflectionTestUtils.setField(builder,"quote", false);
+        builder.appendSimpleQuoted("testValue");
+        String json = builder.write();
         assertEquals(json, "testValue");
     }
 
@@ -49,7 +75,7 @@ public void testObjectWithProperties() {
             builder.property("key1", () -> builder.appendSimple("\"value1\""));
             builder.property("key2", () -> builder.appendSimple("\"value2\""));
         });
-        String json = builder.toString();
+        String json = builder.write();
         assertEquals(json, "{\"key1\": \"value1\",\"key2\": \"value2\"}");
     }
 
@@ -60,7 +86,7 @@ public void testNestedObject() {
                 builder.property("innerKey", () -> builder.appendSimple("\"innerValue\""))
             ))
         );
-        String json = builder.toString();
+        String json = builder.write();
         assertEquals(json, "{\"outerKey\": {\"innerKey\": \"innerValue\"}}");
     }
 
@@ -71,7 +97,7 @@ public void testArray() {
             builder.appendSimple("\"value2\"");
             builder.appendSimple("\"value3\"");
         });
-        String json = builder.toString();
+        String json = builder.write();
         assertEquals(json, "[\"value1\",\"value2\",\"value3\"]");
     }
 
@@ -85,7 +111,7 @@ public void testNestedArray() {
             });
             builder.appendSimple("\"value2\"");
         });
-        String json = builder.toString();
+        String json = builder.write();
         assertEquals(json, "[\"value1\",[\"nestedValue1\",\"nestedValue2\"],\"value2\"]");
     }
 
@@ -100,7 +126,7 @@ public void testMixedStructure() {
             }));
             builder.property("key2", () -> builder.appendSimple("\"value2\""));
         });
-        String json = builder.toString();
+        String json = builder.write();
         assertEquals(json, "{\"key1\": [\"value1\",{\"nestedKey\": \"nestedValue\"}],\"key2\": \"value2\"}");
     }
 
diff --git a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomNumberGeneratorTest.java b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomNumberGeneratorTest.java
new file mode 100644
index 0000000000..fbcb4f0479
--- /dev/null
+++ b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomNumberGeneratorTest.java
@@ -0,0 +1,217 @@
+package org.citrusframework.openapi.random;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.assertFalse;
+import static org.testng.Assert.assertTrue;
+
+import io.apicurio.datamodels.openapi.models.OasSchema;
+import io.apicurio.datamodels.openapi.v3.models.Oas30Schema;
+import java.math.BigDecimal;
+import org.citrusframework.openapi.OpenApiConstants;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.DataProvider;
+import org.testng.annotations.Test;
+
+public class RandomNumberGeneratorTest {
+
+    private RandomNumberGenerator generator;
+    private RandomContext mockContext;
+    private RandomModelBuilder mockBuilder;
+    private OasSchema schema;
+
+    @BeforeMethod
+    public void setUp() {
+        generator = new RandomNumberGenerator();
+        mockContext = mock(RandomContext.class);
+        mockBuilder = mock(RandomModelBuilder.class);
+        schema = new Oas30Schema();
+
+        when(mockContext.getRandomModelBuilder()).thenReturn(mockBuilder);
+    }
+
+    @Test
+    public void testGenerateDefaultBounds() {
+        generator.generate(mockContext, schema);
+        verify(mockBuilder).appendSimple("citrus:randomNumberGenerator('2', '-1000', '1000', 'false', 'false')");
+    }
+
+    @Test
+    public void testGenerateWithMinimum() {
+        schema.minimum = BigDecimal.valueOf(5);
+        generator.generate(mockContext, schema);
+        // Max is because of guessing a reasonable range
+        verify(mockBuilder).appendSimple("citrus:randomNumberGenerator('2', '5', '1005', 'false', 'false')");
+    }
+
+    @Test
+    public void testGenerateWithMaximum() {
+        schema.maximum = BigDecimal.valueOf(15);
+        generator.generate(mockContext, schema);
+        // Min is because of guessing a reasonable range
+        verify(mockBuilder).appendSimple("citrus:randomNumberGenerator('2', '-985', '15', 'false', 'false')");
+    }
+
+    @Test
+    public void testGenerateWithMinimumAndMaximum() {
+        schema.minimum = BigDecimal.valueOf(5);
+        schema.maximum = BigDecimal.valueOf(15);
+        generator.generate(mockContext, schema);
+        verify(mockBuilder).appendSimple("citrus:randomNumberGenerator('2', '5', '15', 'false', 'false')");
+    }
+
+    @Test
+    public void testGenerateWithExclusiveMinimum() {
+        schema.minimum = BigDecimal.valueOf(5);
+        schema.exclusiveMinimum = true;
+        generator.generate(mockContext, schema);
+        // Max is because of guessing a reasonable range
+        verify(mockBuilder).appendSimple("citrus:randomNumberGenerator('2', '5', '1005', 'true', 'false')");
+    }
+
+    @Test
+    public void testGenerateWithExclusiveMaximum() {
+        schema.maximum = BigDecimal.valueOf(15);
+        schema.exclusiveMaximum = true;
+        generator.generate(mockContext, schema);
+        // Min is because of guessing a reasonable range
+        verify(mockBuilder).appendSimple("citrus:randomNumberGenerator('2', '-985', '15', 'false', 'true')");
+    }
+
+    @Test
+    public void testGenerateWithMultipleOf() {
+        schema.multipleOf = BigDecimal.valueOf(5);
+        schema.minimum = BigDecimal.valueOf(10);
+        schema.maximum = BigDecimal.valueOf(50);
+        generator.generate(mockContext, schema);
+        verify(mockBuilder).appendSimple("citrus:randomNumberGenerator('0', '10', '50', 'false', 'false', '5')");
+    }
+
+    @Test
+    public void testGenerateWithIntegerType() {
+        schema.type = "integer";
+        schema.minimum = BigDecimal.valueOf(1);
+        schema.maximum = BigDecimal.valueOf(10);
+        generator.generate(mockContext, schema);
+        verify(mockBuilder).appendSimple("citrus:randomNumberGenerator('0', '1', '10', 'false', 'false')");
+    }
+
+    @Test
+    public void testGenerateWithFloatType() {
+        schema.type = "number";
+        schema.minimum = BigDecimal.valueOf(1.5);
+        schema.maximum = BigDecimal.valueOf(10.5);
+        generator.generate(mockContext, schema);
+        verify(mockBuilder).appendSimple("citrus:randomNumberGenerator('2', '1.5', '10.5', 'false', 'false')");
+    }
+
+    @Test
+    public void testGenerateWithMultipleOfFloat() {
+        schema.type = "number";
+        schema.multipleOf = BigDecimal.valueOf(0.5);
+        schema.minimum = BigDecimal.valueOf(1.0);
+        schema.maximum = BigDecimal.valueOf(5.0);
+        generator.generate(mockContext, schema);
+        verify(mockBuilder).appendSimple("citrus:randomNumberGenerator('1', '1.0', '5.0', 'false', 'false', '0.5')");
+    }
+
+    @Test
+    public void testCalculateMinRelativeToMaxWithMultipleOf() {
+        BigDecimal max = new BigDecimal("1000");
+        Number multipleOf = new BigDecimal("10");
+
+        BigDecimal result = RandomNumberGenerator.calculateMinRelativeToMax(max, multipleOf);
+
+        BigDecimal expected = max.subtract(new BigDecimal(multipleOf.toString()).abs().multiply(RandomNumberGenerator.HUNDRED));
+        assertEquals(result, expected);
+    }
+
+    @Test
+    public void testCalculateMinRelativeToMaxWithoutMultipleOf() {
+        BigDecimal max = new BigDecimal("1000");
+
+        BigDecimal result = RandomNumberGenerator.calculateMinRelativeToMax(max, null);
+
+        BigDecimal expected = max.subtract(max.multiply(BigDecimal.valueOf(2)).max(RandomNumberGenerator.THOUSAND));
+        assertEquals(result, expected);
+    }
+
+    @Test
+    public void testCalculateMaxRelativeToMinWithMultipleOf() {
+        BigDecimal min = new BigDecimal("1000");
+        Number multipleOf = new BigDecimal("10");
+
+        BigDecimal result = RandomNumberGenerator.calculateMaxRelativeToMin(min, multipleOf);
+
+        BigDecimal expected = min.add(new BigDecimal(multipleOf.toString()).abs().multiply(RandomNumberGenerator.HUNDRED));
+        assertEquals(result, expected);
+    }
+
+    @Test
+    public void testCalculateMaxRelativeToMinWithoutMultipleOf() {
+        BigDecimal min = new BigDecimal("1000");
+
+        BigDecimal result = RandomNumberGenerator.calculateMaxRelativeToMin(min, null);
+
+        BigDecimal expected = min.add(min.multiply(BigDecimal.valueOf(2)).max(RandomNumberGenerator.THOUSAND));
+        assertEquals(result, expected);
+    }
+
+    @Test
+    public void testHandlesWithIntegerType() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = OpenApiConstants.TYPE_INTEGER;
+
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testHandlesWithNumberType() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = OpenApiConstants.TYPE_NUMBER;
+
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testHandlesWithOtherType() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = "string";
+
+        assertFalse(generator.handles(schema));
+    }
+
+    @Test
+    public void testHandlesWithNullType() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = null;
+
+        assertFalse(generator.handles(schema));
+    }
+
+    @Test
+    public void testHandlesWithNullSchema() {
+        assertFalse(generator.handles(null));
+    }
+
+    @DataProvider(name = "findLeastSignificantDecimalPlace")
+    public static Object[][] findLeastSignificantDecimalPlace() {
+        return new Object[][]{
+            {new BigDecimal("1234.5678"), 4},
+            {new BigDecimal("123.567"), 3},
+            {new BigDecimal("123.56"), 2},
+            {new BigDecimal("123.5"), 1},
+            {new BigDecimal("123.0"), 0},
+            {new BigDecimal("123"), 0}
+        };
+    }
+
+    @Test(dataProvider = "findLeastSignificantDecimalPlace")
+    void findLeastSignificantDecimalPlace(BigDecimal number, int expectedSignificance) {
+        assertEquals(generator.findLeastSignificantDecimalPlace(number),
+            expectedSignificance);
+    }
+
+}
diff --git a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomObjectGeneratorTest.java b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomObjectGeneratorTest.java
new file mode 100644
index 0000000000..a32809f2f9
--- /dev/null
+++ b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomObjectGeneratorTest.java
@@ -0,0 +1,134 @@
+package org.citrusframework.openapi.random;
+
+import static org.mockito.Mockito.any;
+import static org.mockito.Mockito.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.spy;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+import static org.testng.Assert.assertFalse;
+import static org.testng.Assert.assertTrue;
+
+import io.apicurio.datamodels.openapi.models.OasSchema;
+import io.apicurio.datamodels.openapi.v3.models.Oas30Schema;
+import java.util.ArrayDeque;
+import java.util.Deque;
+import java.util.HashMap;
+import java.util.List;
+import org.citrusframework.openapi.OpenApiConstants;
+import org.citrusframework.openapi.OpenApiSpecification;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.Test;
+
+public class RandomObjectGeneratorTest {
+
+    private RandomObjectGenerator generator;
+    private RandomContext contextMock;
+    private RandomModelBuilder randomModelBuilderSpy;
+    private OpenApiSpecification specificationMock;
+
+    @BeforeMethod
+    public void setUp() {
+        generator = new RandomObjectGenerator();
+        contextMock = mock();
+        specificationMock = mock();
+
+        randomModelBuilderSpy = spy(new RandomModelBuilder(true));
+        when(contextMock.getRandomModelBuilder()).thenReturn(randomModelBuilderSpy);
+        when(contextMock.getSpecification()).thenReturn(specificationMock);
+        when(contextMock.get(eq("OBJECT_STACK"), any())).thenReturn(new ArrayDeque<>());
+
+    }
+
+    @Test
+    public void testHandlesObjectType() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = OpenApiConstants.TYPE_OBJECT;
+
+        assertTrue(generator.handles(schema));
+    }
+
+    @Test
+    public void testDoesNotHandleNonObjectType() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = OpenApiConstants.TYPE_STRING;
+
+        assertFalse(generator.handles(schema));
+    }
+
+    @Test
+    public void testGenerateObjectWithoutProperties() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = OpenApiConstants.TYPE_OBJECT;
+
+        generator.generate(contextMock, schema);
+
+        verify(randomModelBuilderSpy).object(any());
+    }
+
+    @Test
+    public void testGenerateObjectWithProperties() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = OpenApiConstants.TYPE_OBJECT;
+        schema.properties = new HashMap<>();
+        OasSchema propertySchema = new Oas30Schema();
+        schema.properties.put("property1", propertySchema);
+
+        when(specificationMock.isGenerateOptionalFields()).thenReturn(true);
+
+        generator.generate(contextMock, schema);
+
+        verify(randomModelBuilderSpy).object(any());
+        verify(randomModelBuilderSpy).property(eq("property1"), any());
+        verify(contextMock).generate(propertySchema);
+    }
+
+    @Test
+    public void testGenerateObjectWithRequiredProperties() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = OpenApiConstants.TYPE_OBJECT;
+        schema.properties = new HashMap<>();
+        OasSchema propertySchema = new Oas30Schema();
+        schema.properties.put("property1", propertySchema);
+        schema.required = List.of("property1");
+
+        when(specificationMock.isGenerateOptionalFields()).thenReturn(false);
+
+        generator.generate(contextMock, schema);
+
+        verify(randomModelBuilderSpy).object(any());
+        verify(randomModelBuilderSpy).property(eq("property1"), any());
+        verify(contextMock).generate(propertySchema);
+    }
+
+    @Test
+    public void testGenerateObjectWithOptionalProperties() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = OpenApiConstants.TYPE_OBJECT;
+        schema.properties = new HashMap<>();
+        OasSchema propertySchema = new Oas30Schema();
+        schema.properties.put("property1", propertySchema);
+        schema.required = List.of();
+        when(specificationMock.isGenerateOptionalFields()).thenReturn(false);
+        generator.generate(contextMock, schema);
+
+        verify(randomModelBuilderSpy).object(any());
+        verify(randomModelBuilderSpy, never()).property(eq("property1"), any());
+        verify(contextMock, never()).generate(propertySchema);
+    }
+
+    @Test
+    public void testGenerateObjectWithRecursion() {
+        OasSchema schema = new Oas30Schema();
+        schema.type = OpenApiConstants.TYPE_OBJECT;
+        Deque objectStack = new ArrayDeque<>();
+        objectStack.push(schema);
+
+        when(contextMock.get(eq("OBJECT_STACK"), any())).thenReturn(objectStack);
+
+        generator.generate(contextMock, schema);
+
+        verify(randomModelBuilderSpy, never()).object(any());
+    }
+}
diff --git a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomStringGeneratorTest.java b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomStringGeneratorTest.java
new file mode 100644
index 0000000000..445a318bd9
--- /dev/null
+++ b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/random/RandomStringGeneratorTest.java
@@ -0,0 +1,70 @@
+package org.citrusframework.openapi.random;
+
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+
+import io.apicurio.datamodels.openapi.models.OasSchema;
+import io.apicurio.datamodels.openapi.v3.models.Oas30Schema;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.Test;
+
+public class RandomStringGeneratorTest {
+
+    private RandomStringGenerator generator;
+    private RandomContext mockContext;
+    private RandomModelBuilder mockBuilder;
+    private OasSchema schema;
+
+    @BeforeMethod
+    public void setUp() {
+        generator = new RandomStringGenerator();
+        mockContext = mock(RandomContext.class);
+        mockBuilder = mock(RandomModelBuilder.class);
+        schema = new Oas30Schema();
+
+        when(mockContext.getRandomModelBuilder()).thenReturn(mockBuilder);
+    }
+
+    @Test
+    public void testGenerateDefaultLength() {
+        generator.generate(mockContext, schema);
+        verify(mockBuilder).appendSimpleQuoted("citrus:randomString(10,MIXED,true,1)");
+    }
+
+    @Test
+    public void testGenerateWithMinLength() {
+        schema.minLength = 5;
+        generator.generate(mockContext, schema);
+        verify(mockBuilder).appendSimpleQuoted("citrus:randomString(10,MIXED,true,5)");
+    }
+
+    @Test
+    public void testGenerateWithMaxLength() {
+        schema.maxLength = 15;
+        generator.generate(mockContext, schema);
+        verify(mockBuilder).appendSimpleQuoted("citrus:randomString(15,MIXED,true,1)");
+    }
+
+    @Test
+    public void testGenerateWithMinAndMaxLength() {
+        schema.minLength = 3;
+        schema.maxLength = 8;
+        generator.generate(mockContext, schema);
+        verify(mockBuilder).appendSimpleQuoted("citrus:randomString(8,MIXED,true,3)");
+    }
+
+    @Test
+    public void testGenerateWithZeroMinLength() {
+        schema.minLength = 0;
+        generator.generate(mockContext, schema);
+        verify(mockBuilder).appendSimpleQuoted("citrus:randomString(10,MIXED,true,1)");
+    }
+
+    @Test
+    public void testGenerateWithZeroMaxLength() {
+        schema.maxLength = 0;
+        generator.generate(mockContext, schema);
+        verify(mockBuilder).appendSimpleQuoted("citrus:randomString(10,MIXED,true,1)");
+    }
+}
diff --git a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/validation/OpenApiRequestValidationProcessorTest.java b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/validation/OpenApiRequestValidationProcessorTest.java
index 80d901395d..04a0d47086 100644
--- a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/validation/OpenApiRequestValidationProcessorTest.java
+++ b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/validation/OpenApiRequestValidationProcessorTest.java
@@ -85,7 +85,7 @@ public void shouldValidateHttpMessage() {
 
         processor.validate(httpMessageMock, contextMock);
 
-        verify(openApiRequestValidatorSpy, times(1)).validateRequest(operationPathAdapterMock, httpMessageMock);
+        verify(openApiRequestValidatorSpy).validateRequest(operationPathAdapterMock, httpMessageMock);
     }
 
     @Test
@@ -100,7 +100,7 @@ public void shouldCallValidateRequest() {
 
         processor.validate(httpMessageMock, contextMock);
 
-        verify(openApiSpecificationMock, times(1)).getOperation(anyString(),
+        verify(openApiSpecificationMock).getOperation(anyString(),
             any(TestContext.class));
         verify(openApiRequestValidatorSpy, times(0)).validateRequest(operationPathAdapterMock, httpMessageMock);
     }
diff --git a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/validation/OpenApiRequestValidatorTest.java b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/validation/OpenApiRequestValidatorTest.java
index f79a8a9887..3716b503c7 100644
--- a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/validation/OpenApiRequestValidatorTest.java
+++ b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/validation/OpenApiRequestValidatorTest.java
@@ -19,7 +19,6 @@
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.doReturn;
 import static org.mockito.Mockito.never;
-import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 import static org.testng.Assert.assertEquals;
@@ -113,8 +112,8 @@ public void shouldValidateRequestWithNoErrors() {
         openApiRequestValidator.validateRequest(operationPathAdapterMock, httpMessageMock);
 
         // Then
-        verify(openApiInteractionValidatorMock, times(1)).validateRequest(any(Request.class));
-        verify(validationReportMock, times(1)).hasErrors();
+        verify(openApiInteractionValidatorMock).validateRequest(any(Request.class));
+        verify(validationReportMock).hasErrors();
     }
 
     @Test(expectedExceptions = ValidationException.class)
@@ -131,8 +130,8 @@ public void shouldValidateRequestWithErrors() {
         openApiRequestValidator.validateRequest(operationPathAdapterMock, httpMessageMock);
 
         // Then
-        verify(openApiInteractionValidatorMock, times(1)).validateRequest(any(Request.class));
-        verify(validationReportMock, times(1)).hasErrors();
+        verify(openApiInteractionValidatorMock).validateRequest(any(Request.class));
+        verify(validationReportMock).hasErrors();
     }
 
     @Test
diff --git a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/validation/OpenApiResponseValidationProcessorTest.java b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/validation/OpenApiResponseValidationProcessorTest.java
index 671560ba9f..2058af2558 100644
--- a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/validation/OpenApiResponseValidationProcessorTest.java
+++ b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/validation/OpenApiResponseValidationProcessorTest.java
@@ -85,7 +85,7 @@ public void shouldCallValidateResponse() {
 
         processor.validate(httpMessageMock, contextMock);
 
-        verify(openApiResponseValidatorSpy, times(1)).validateResponse(operationPathAdapterMock, httpMessageMock);
+        verify(openApiResponseValidatorSpy).validateResponse(operationPathAdapterMock, httpMessageMock);
     }
 
     @Test
@@ -100,7 +100,7 @@ public void shouldNotValidateWhenNoOperation() {
 
         processor.validate(httpMessageMock, contextMock);
 
-        verify(openApiSpecificationMock, times(1)).getOperation(anyString(),
+        verify(openApiSpecificationMock).getOperation(anyString(),
             any(TestContext.class));
         verify(openApiResponseValidatorSpy, times(0)).validateResponse(operationPathAdapterMock, httpMessageMock);
     }
diff --git a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/validation/OpenApiResponseValidatorTest.java b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/validation/OpenApiResponseValidatorTest.java
index e59f1f2821..cfccf76d92 100644
--- a/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/validation/OpenApiResponseValidatorTest.java
+++ b/connectors/citrus-openapi/src/test/java/org/citrusframework/openapi/validation/OpenApiResponseValidatorTest.java
@@ -16,11 +16,24 @@
 
 package org.citrusframework.openapi.validation;
 
+import static org.mockito.ArgumentMatchers.any;
+import static org.mockito.Mockito.anyString;
+import static org.mockito.Mockito.doReturn;
+import static org.mockito.Mockito.never;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.when;
+import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.assertNotNull;
+import static org.testng.Assert.assertTrue;
+
 import com.atlassian.oai.validator.OpenApiInteractionValidator;
 import com.atlassian.oai.validator.model.Request.Method;
 import com.atlassian.oai.validator.model.Response;
 import com.atlassian.oai.validator.report.ValidationReport;
 import io.apicurio.datamodels.openapi.models.OasOperation;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.util.Map;
 import org.citrusframework.exceptions.ValidationException;
 import org.citrusframework.http.message.HttpMessage;
 import org.citrusframework.openapi.OpenApiSpecification;
@@ -34,21 +47,6 @@
 import org.testng.annotations.BeforeMethod;
 import org.testng.annotations.Test;
 
-import java.io.IOException;
-import java.nio.charset.StandardCharsets;
-import java.util.Map;
-
-import static org.mockito.ArgumentMatchers.any;
-import static org.mockito.Mockito.anyString;
-import static org.mockito.Mockito.doReturn;
-import static org.mockito.Mockito.never;
-import static org.mockito.Mockito.times;
-import static org.mockito.Mockito.verify;
-import static org.mockito.Mockito.when;
-import static org.testng.Assert.assertEquals;
-import static org.testng.Assert.assertNotNull;
-import static org.testng.Assert.assertTrue;
-
 public class OpenApiResponseValidatorTest {
 
     @Mock
@@ -120,8 +118,8 @@ public void shouldValidateWithNoErrors() {
         openApiResponseValidator.validateResponse(operationPathAdapterMock, httpMessageMock);
 
         // Then
-        verify(openApiInteractionValidatorMock, times(1)).validateResponse(anyString(), any(Method.class), any(Response.class));
-        verify(validationReportMock, times(1)).hasErrors();
+        verify(openApiInteractionValidatorMock).validateResponse(anyString(), any(Method.class), any(Response.class));
+        verify(validationReportMock).hasErrors();
     }
 
     @Test(expectedExceptions = ValidationException.class)
@@ -141,8 +139,8 @@ public void shouldValidateWithErrors() {
         openApiResponseValidator.validateResponse(operationPathAdapterMock, httpMessageMock);
 
         // Then
-        verify(openApiInteractionValidatorMock, times(1)).validateResponse(anyString(), any(Method.class), any(Response.class));
-        verify(validationReportMock, times(1)).hasErrors();
+        verify(openApiInteractionValidatorMock).validateResponse(anyString(), any(Method.class), any(Response.class));
+        verify(validationReportMock).hasErrors();
     }
 
     @Test
diff --git a/core/citrus-base/src/main/java/org/citrusframework/functions/DefaultFunctionLibrary.java b/core/citrus-base/src/main/java/org/citrusframework/functions/DefaultFunctionLibrary.java
index eb70e1e543..caf65a1d31 100644
--- a/core/citrus-base/src/main/java/org/citrusframework/functions/DefaultFunctionLibrary.java
+++ b/core/citrus-base/src/main/java/org/citrusframework/functions/DefaultFunctionLibrary.java
@@ -67,7 +67,7 @@ public DefaultFunctionLibrary() {
         getMembers().put("randomNumber", new RandomNumberFunction());
         getMembers().put("randomNumberGenerator", new AdvancedRandomNumberFunction());
         getMembers().put("randomString", new RandomStringFunction());
-        getMembers().put("randomValue", new RandomPatternFunction());
+        getMembers().put("randomPattern", new RandomPatternFunction());
         getMembers().put("concat", new ConcatFunction());
         getMembers().put("currentDate", new CurrentDateFunction());
         getMembers().put("substring", new SubstringFunction());
diff --git a/core/citrus-base/src/main/java/org/citrusframework/functions/core/AdvancedRandomNumberFunction.java b/core/citrus-base/src/main/java/org/citrusframework/functions/core/AdvancedRandomNumberFunction.java
index bc7252e057..6cde8506c4 100644
--- a/core/citrus-base/src/main/java/org/citrusframework/functions/core/AdvancedRandomNumberFunction.java
+++ b/core/citrus-base/src/main/java/org/citrusframework/functions/core/AdvancedRandomNumberFunction.java
@@ -21,8 +21,9 @@
 import java.math.BigDecimal;
 import java.math.RoundingMode;
 import java.util.List;
-import java.util.Random;
+import java.util.concurrent.ThreadLocalRandom;
 import org.citrusframework.context.TestContext;
+import org.citrusframework.exceptions.CitrusRuntimeException;
 import org.citrusframework.exceptions.InvalidFunctionUsageException;
 import org.citrusframework.functions.Function;
 
@@ -37,71 +38,72 @@
  *     
  • Min value: The minimum value for the generated random number (optional, default: Double.MIN_VALUE).
    • 
  *     
  • Max value: The maximum value for the generated random number (optional, default: Double.MAX_VALUE).
    • 
  *     
  • Exclude min: Whether to exclude the minimum value (optional, default: false).
    • 
- *     
  • Exclude man: Whether to exclude the maximum value (optional, default: false).
    • 
+ *     
  • Exclude max: Whether to exclude the maximum value (optional, default: false).
    • 
+ *     
  • Multiple of: The generated number will be a multiple of this value (optional).
    • 
  * 
  * 
    
- *  This function differs from the {@link RandomNumberFunction} in several key ways:
- *  
      
+ * This function differs from the {@link RandomNumberFunction} in several key ways:
+ * 
        
  *     
      • It allows to specify several aspects of a number (see above).
        • 
  *     
      • The length of the number is restricted to the range and precision of a double, whereas RandomNumberFunction can create arbitrarily long integer values.
        • 
- *  
      
+ * 
    
  */
 public class AdvancedRandomNumberFunction implements Function {
 
-    /**
-     * Basic seed generating random number
-     */
-    private static final Random generator = new Random(System.currentTimeMillis());
+    public static final BigDecimal DEFAULT_MAX_VALUE = new BigDecimal(1000000);
+    public static final BigDecimal DEFAULT_MIN_VALUE = DEFAULT_MAX_VALUE.negate();
 
     public String execute(List parameterList, TestContext context) {
-        int decimalPlaces = 0;
-        double minValue = -1000000;
-        double maxValue = 1000000;
-        boolean excludeMin = false;
-        boolean excludeMax = false;
-
         if (parameterList == null) {
             throw new InvalidFunctionUsageException("Function parameters must not be null.");
         }
 
-        if (!parameterList.isEmpty()) {
-            decimalPlaces = parseParameter(1, parameterList.get(0), Integer.class,
-                Integer::parseInt);
-            if (decimalPlaces < 0) {
-                throw new InvalidFunctionUsageException(
-                    "Invalid parameter definition. Decimal places must be a non-negative integer value.");
-            }
+        int decimalPlaces = getParameter(parameterList, 0, Integer.class, Integer::parseInt, 2);
+        if (decimalPlaces < 0) {
+            throw new InvalidFunctionUsageException(
+                "Decimal places must be a non-negative integer value.");
         }
 
-        if (parameterList.size() > 1) {
-            minValue = parseParameter(2, parameterList.get(1), Double.class, Double::parseDouble);
+        BigDecimal minValue = getParameter(parameterList, 1, BigDecimal.class, BigDecimal::new,
+            DEFAULT_MIN_VALUE);
+        BigDecimal maxValue = getParameter(parameterList, 2, BigDecimal.class, BigDecimal::new,
+            DEFAULT_MAX_VALUE);
+        if (minValue.compareTo(maxValue) > 0) {
+            throw new InvalidFunctionUsageException("Min value must be less than max value.");
         }
 
-        if (parameterList.size() > 2) {
-            maxValue = parseParameter(3, parameterList.get(2), Double.class, Double::parseDouble);
-            if (minValue > maxValue) {
-                throw new InvalidFunctionUsageException(
-                    "Invalid parameter definition. Min value must be less than max value.");
-            }
-        }
+        boolean excludeMin = getParameter(parameterList, 3, Boolean.class, Boolean::parseBoolean,
+            false);
+        boolean excludeMax = getParameter(parameterList, 4, Boolean.class, Boolean::parseBoolean,
+            false);
+        BigDecimal multiple = getParameter(parameterList, 5, BigDecimal.class, BigDecimal::new,
+            null);
 
-        if (parameterList.size() > 3) {
-            excludeMin = parseParameter(4, parameterList.get(3), Boolean.class,
-                Boolean::parseBoolean);
-        }
+        return getRandomNumber(decimalPlaces, minValue, maxValue, excludeMin, excludeMax, multiple);
+    }
 
-        if (parameterList.size() > 4) {
-            excludeMax = parseParameter(5, parameterList.get(4), Boolean.class,
-                Boolean::parseBoolean);
+    private  T getParameter(List params, int index, Class type,
+        java.util.function.Function parser, T defaultValue) {
+        if (index < params.size()) {
+            String param = params.get(index);
+            return "null".equals(param) ? defaultValue
+                : parseParameter(index + 1, param, type, parser);
         }
-
-        return getRandomNumber(decimalPlaces, minValue, maxValue, excludeMin, excludeMax);
+        return defaultValue;
     }
 
     private  T parseParameter(int index, String text, Class type,
         java.util.function.Function parseFunction) {
+        T value;
         try {
-            return parseFunction.apply(text);
+
+            value = parseFunction.apply(text);
+            if (value == null) {
+                throw new CitrusRuntimeException(
+                    "Text '%s' could not be parsed to '%s'. Resulting value is null".formatted(text,
+                        type.getSimpleName()));
+            }
+            return value;
         } catch (Exception e) {
             throw new InvalidFunctionUsageException(
                 format("Invalid parameter at index %d. %s must be parsable to %s.", index, text,
@@ -112,33 +114,114 @@ private  T parseParameter(int index, String text, Class type,
     /**
      * Static number generator method.
      */
-    private String getRandomNumber(int decimalPlaces, double minValue, double maxValue,
-        boolean excludeMin, boolean excludeMax) {
-        double adjustment = Math.pow(10, -decimalPlaces);
+    private String getRandomNumber(int decimalPlaces, BigDecimal minValue, BigDecimal maxValue,
+        boolean excludeMin, boolean excludeMax, BigDecimal multiple) {
 
-        if (excludeMin) {
-            minValue += adjustment;
-        }
+        minValue = excludeMin ? incrementToExclude(minValue) : minValue;
+        maxValue = excludeMax ? decrementToExclude(maxValue) : maxValue;
 
-        if (excludeMax) {
-            maxValue -= adjustment;
-        }
+        BigDecimal range = maxValue.subtract(minValue);
 
-        BigDecimal range = BigDecimal.valueOf(maxValue).subtract(BigDecimal.valueOf(minValue));
+        BigDecimal randomValue;
+        if (multiple != null) {
+            randomValue = createMultipleOf(minValue, maxValue, multiple);
+        } else {
+            randomValue = createRandomValue(minValue, range,
+                ThreadLocalRandom.current().nextDouble());
+            randomValue = randomValue.setScale(decimalPlaces, RoundingMode.HALF_UP);
+        }
 
-        double randomValue = getRandomValue(minValue, range, generator.nextDouble());
-        BigDecimal bd = new BigDecimal(Double.toString(randomValue));
-        bd = bd.setScale(2, RoundingMode.HALF_UP);
+        if (randomValue == null) {
+            // May only happen if multiple is out of range of min/max
+            return format("%s", Double.POSITIVE_INFINITY);
+        }
 
         return decimalPlaces == 0 ?
-            format("%s", bd.longValue()) :
-            format(format("%%.%sf", decimalPlaces), bd.doubleValue());
+            format("%s", randomValue.longValue()) :
+            format(format("%%.%sf", decimalPlaces), randomValue.doubleValue());
     }
 
-    double getRandomValue(double minValue, BigDecimal range, double random) {
+    // Pass in random for testing
+    BigDecimal createRandomValue(BigDecimal minValue, BigDecimal range, double random) {
         BigDecimal offset = range.multiply(BigDecimal.valueOf(random));
-        BigDecimal value =  BigDecimal.valueOf(minValue).add(offset);
-        return value.compareTo(BigDecimal.valueOf(Double.MAX_VALUE)) > 0 ? Double.MAX_VALUE : value.doubleValue();
+        BigDecimal value = minValue.add(offset);
+        return value.compareTo(BigDecimal.valueOf(Double.MAX_VALUE)) > 0 ? BigDecimal.valueOf(
+            Double.MAX_VALUE) : value;
+    }
+
+    private BigDecimal largestMultipleOf(BigDecimal highest, BigDecimal multipleOf) {
+        RoundingMode roundingMode =
+            highest.compareTo(BigDecimal.ZERO) < 0 ? RoundingMode.UP : RoundingMode.DOWN;
+        BigDecimal factor = highest.divide(multipleOf, 0, roundingMode);
+        return multipleOf.multiply(factor);
+    }
+
+    private BigDecimal lowestMultipleOf(BigDecimal lowest, BigDecimal multipleOf) {
+        RoundingMode roundingMode =
+            lowest.compareTo(java.math.BigDecimal.ZERO) < 0 ? RoundingMode.DOWN : RoundingMode.UP;
+        BigDecimal factor = lowest.divide(multipleOf, 0, roundingMode);
+        return multipleOf.multiply(factor);
+    }
+
+    private BigDecimal incrementToExclude(BigDecimal val) {
+        return val.add(determineIncrement(val))
+            .setScale(findLeastSignificantDecimalPlace(val), RoundingMode.HALF_DOWN);
+    }
+
+    private BigDecimal decrementToExclude(BigDecimal val) {
+        return val.subtract(determineIncrement(val))
+            .setScale(findLeastSignificantDecimalPlace(val), RoundingMode.HALF_DOWN);
+    }
+
+    private BigDecimal determineIncrement(BigDecimal number) {
+        return java.math.BigDecimal.valueOf(
+            1.0d / (Math.pow(10d, findLeastSignificantDecimalPlace(number))));
+    }
+
+    private int findLeastSignificantDecimalPlace(BigDecimal number) {
+        number = number.stripTrailingZeros();
+
+        String[] parts = number.toPlainString().split("\\.");
+
+        if (parts.length == 1) {
+            return 0;
+        }
+
+        return parts[1].length();
+    }
+
+    private BigDecimal createMultipleOf(
+        BigDecimal minimum,
+        BigDecimal maximum,
+        BigDecimal multipleOf
+    ) {
+
+        BigDecimal lowestMultiple = lowestMultipleOf(minimum, multipleOf);
+        BigDecimal largestMultiple = largestMultipleOf(maximum, multipleOf);
+
+        // Check if there are no valid multiples in the range
+        if (lowestMultiple.compareTo(largestMultiple) > 0) {
+            return null;
+        }
+
+        BigDecimal range = largestMultiple.subtract(lowestMultiple)
+            .divide(multipleOf, RoundingMode.DOWN);
+
+        // Don't go for incredible large numbers
+        if (range.compareTo(BigDecimal.valueOf(11)) > 0) {
+            range = BigDecimal.valueOf(10);
+        }
+
+        long factor = 0;
+        if (range.compareTo(BigDecimal.ZERO) != 0) {
+            factor = ThreadLocalRandom.current().nextLong(1, range.longValue() + 1);
+        }
+        BigDecimal randomMultiple = lowestMultiple.add(
+            multipleOf.multiply(BigDecimal.valueOf(factor)));
+        randomMultiple = randomMultiple.setScale(findLeastSignificantDecimalPlace(multipleOf),
+            RoundingMode.HALF_UP);
+
+        return randomMultiple;
     }
 
 }
\ No newline at end of file
diff --git a/core/citrus-base/src/main/java/org/citrusframework/functions/core/RandomPatternFunction.java b/core/citrus-base/src/main/java/org/citrusframework/functions/core/RandomPatternFunction.java
index 4720921c7e..377b2d5fe7 100644
--- a/core/citrus-base/src/main/java/org/citrusframework/functions/core/RandomPatternFunction.java
+++ b/core/citrus-base/src/main/java/org/citrusframework/functions/core/RandomPatternFunction.java
@@ -25,9 +25,8 @@
 import org.citrusframework.functions.Function;
 
 /**
- * The RandomPatternFunction class implements the Function interface. This function generates a
- * random string based on a provided regular expression pattern. It uses the Generex library to
- * generate the random string.
+ * The RandomPatternFunction generates a random string based on a provided regular expression pattern.
+ * It uses the Generex library to generate the random string.
  * 
    
  * Note: The Generex library has limitations in its ability to generate all possible expressions
  * from a given regular expression. It may not support certain complex regex features or produce all
diff --git a/core/citrus-base/src/main/java/org/citrusframework/functions/core/RandomStringFunction.java b/core/citrus-base/src/main/java/org/citrusframework/functions/core/RandomStringFunction.java
index 099c13df55..326471a2b5 100644
--- a/core/citrus-base/src/main/java/org/citrusframework/functions/core/RandomStringFunction.java
+++ b/core/citrus-base/src/main/java/org/citrusframework/functions/core/RandomStringFunction.java
@@ -19,6 +19,7 @@
 import java.util.List;
 import java.util.Random;
 
+import java.util.concurrent.ThreadLocalRandom;
 import org.citrusframework.context.TestContext;
 import org.citrusframework.exceptions.InvalidFunctionUsageException;
 import org.citrusframework.functions.Function;
@@ -32,7 +33,7 @@
  *
  */
 public class RandomStringFunction implements Function {
-    private static Random generator = new Random(System.currentTimeMillis());
+    private static final Random generator = new Random(System.currentTimeMillis());
 
     private static final char[] ALPHABET_UPPER = { 'A', 'B', 'C', 'D', 'E', 'F', 'G',
         'H', 'I', 'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T',
@@ -67,12 +68,13 @@ public String execute(List parameterList, TestContext context) {
         int numberOfLetters;
         String notationMethod = MIXED;
         boolean includeNumbers = false;
+        int minNumberOfLetters = -1;
 
         if (parameterList == null || parameterList.isEmpty()) {
             throw new InvalidFunctionUsageException("Function parameters must not be empty");
         }
 
-        if (parameterList.size() > 3) {
+        if (parameterList.size() > 4) {
             throw new InvalidFunctionUsageException("Too many parameters for function");
         }
 
@@ -89,12 +91,16 @@ public String execute(List parameterList, TestContext context) {
             includeNumbers = parseBoolean(parameterList.get(2));
         }
 
+        if (parameterList.size() > 3) {
+            minNumberOfLetters = parseInt(parameterList.get(3));
+        }
+
         if (notationMethod.equals(UPPERCASE)) {
-            return getRandomString(numberOfLetters, ALPHABET_UPPER, includeNumbers);
+            return getRandomString(numberOfLetters, ALPHABET_UPPER, includeNumbers, minNumberOfLetters);
         } else if (notationMethod.equals(LOWERCASE)) {
-            return getRandomString(numberOfLetters, ALPHABET_LOWER, includeNumbers);
+            return getRandomString(numberOfLetters, ALPHABET_LOWER, includeNumbers, minNumberOfLetters);
         } else {
-            return getRandomString(numberOfLetters, ALPHABET_MIXED, includeNumbers);
+            return getRandomString(numberOfLetters, ALPHABET_MIXED, includeNumbers, minNumberOfLetters);
         }
     }
 
@@ -105,7 +111,7 @@ public String execute(List parameterList, TestContext context) {
      * @param includeNumbers
      * @return
      */
-    public static String getRandomString(int numberOfLetters, char[] alphabet, boolean includeNumbers) {
+    public static String getRandomString(int numberOfLetters, char[] alphabet, boolean includeNumbers, int minNumberOfLetters) {
         StringBuilder builder = new StringBuilder();
 
         int upperRange = alphabet.length - 1;
@@ -117,6 +123,11 @@ public static String getRandomString(int numberOfLetters, char[] alphabet, boole
             upperRange += NUMBERS.length;
         }
 
+        if (minNumberOfLetters > -1) {
+            numberOfLetters = ThreadLocalRandom.current()
+                .nextInt(minNumberOfLetters, numberOfLetters + 1);
+        }
+
         for (int i = 1; i < numberOfLetters; i++) {
             int letterIndex = generator.nextInt(upperRange);
 
diff --git a/core/citrus-base/src/main/java/org/citrusframework/util/StringUtils.java b/core/citrus-base/src/main/java/org/citrusframework/util/StringUtils.java
index 3d6be1f9b3..21cf207378 100644
--- a/core/citrus-base/src/main/java/org/citrusframework/util/StringUtils.java
+++ b/core/citrus-base/src/main/java/org/citrusframework/util/StringUtils.java
@@ -63,7 +63,7 @@ public static String appendSegmentToUrlPath(String path, String segment) {
     }
 
     public static String quote(String text, boolean quote) {
-        return quote ? String.format("\"%s\"", text) : text;
+        return quote ? "\"" + text + "\"" : text;
     }
 
     /**
diff --git a/core/citrus-base/src/test/java/org/citrusframework/functions/core/AdvancedRandomNumberFunctionTest.java b/core/citrus-base/src/test/java/org/citrusframework/functions/core/AdvancedRandomNumberFunctionTest.java
new file mode 100644
index 0000000000..82cf51cfa7
--- /dev/null
+++ b/core/citrus-base/src/test/java/org/citrusframework/functions/core/AdvancedRandomNumberFunctionTest.java
@@ -0,0 +1,416 @@
+/*
+ * Copyright the original author or authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.citrusframework.functions.core;
+
+import static org.testng.Assert.assertEquals;
+import static org.testng.Assert.assertNotNull;
+import static org.testng.Assert.assertTrue;
+
+import java.math.BigDecimal;
+import java.util.List;
+import org.citrusframework.context.TestContext;
+import org.citrusframework.exceptions.InvalidFunctionUsageException;
+import org.testng.Assert;
+import org.testng.annotations.BeforeMethod;
+import org.testng.annotations.DataProvider;
+import org.testng.annotations.Test;
+
+public class AdvancedRandomNumberFunctionTest {
+
+    private AdvancedRandomNumberFunction function;
+    private TestContext context;
+
+    @BeforeMethod
+    public void setUp() {
+        function = new AdvancedRandomNumberFunction();
+        context = new TestContext();
+    }
+
+    @Test
+    public void testRandomNumberWithNullParameter() {
+        InvalidFunctionUsageException exception = expectThrows(InvalidFunctionUsageException.class,
+            () -> function.execute(null, context));
+        assertEquals(exception.getMessage(),
+            "Function parameters must not be null.");
+    }
+
+    @Test
+    public void testRandomNumberWithDefaultValues() {
+        List params = List.of();
+        String result = function.execute(params, context);
+        assertNotNull(result);
+        assertTrue(result.matches("-?\\d*\\.\\d{2}"));
+    }
+
+    @Test
+    public void testRandomNumberWithDecimalPlaces() {
+        List params = List.of("2");
+        String result = function.execute(params, context);
+        assertNotNull(result);
+        assertTrue(result.matches("-?\\d*\\.\\d{2}"), "result does not match pattern: " + result);
+    }
+
+    @Test
+    public void testRandomNumberWithinRange() {
+        List params = List.of("2", "10.5", "20.5");
+        String result = function.execute(params, context);
+        assertNotNull(result);
+        double randomValue = Double.parseDouble(result);
+        assertTrue(randomValue >= 10.5 && randomValue <= 20.5);
+    }
+
+    @Test
+    public void testRandomNumberIncludesMin() {
+        List params = List.of("1", "10.5", "20.5");
+        function = new AdvancedRandomNumberFunction() {
+            @Override
+            BigDecimal createRandomValue(BigDecimal minValue, BigDecimal range, double random) {
+                random = 0.0;
+                return super.createRandomValue(minValue, range, random);
+            }
+        };
+        String result = function.execute(params, context);
+        assertEquals(result, "10.5");
+    }
+
+    @Test
+    public void testRandomNumberIncludesMax() {
+        List params = List.of("1", "10.5", "20.5");
+        function = new AdvancedRandomNumberFunction() {
+            @Override
+            BigDecimal createRandomValue(BigDecimal minValue, BigDecimal range, double random) {
+                random = 1.0;
+                return super.createRandomValue(minValue, range, random);
+            }
+        };
+        String result = function.execute(params, context);
+        assertEquals(result, "20.5");
+    }
+
+    @Test
+    public void testRandomNumberExcludeMin() {
+        List params = List.of("1", "10.5", "20.5", "true", "false");
+        function = new AdvancedRandomNumberFunction() {
+            @Override
+            BigDecimal createRandomValue(BigDecimal minValue, BigDecimal range, double random) {
+                random = 0.0;
+                return super.createRandomValue(minValue, range, random);
+            }
+        };
+        String result = function.execute(params, context);
+        assertNotNull(result);
+        double randomValue = Double.parseDouble(result);
+        assertTrue(randomValue > 10.5 && randomValue <= 20.5);
+    }
+
+    @Test
+    public void testRandomNumberExcludeMax() {
+        List params = List.of("2", "10.5", "20.5", "false", "true");
+        function = new AdvancedRandomNumberFunction() {
+            @Override
+            BigDecimal createRandomValue(BigDecimal minValue, BigDecimal range, double random) {
+                random = 1.0;
+                return super.createRandomValue(minValue, range, random);
+            }
+        };
+        String result = function.execute(params, context);
+        assertNotNull(result);
+        double randomValue = Double.parseDouble(result);
+        assertTrue(randomValue >= 10.5 && randomValue < 20.5);
+    }
+
+    @Test
+    public void testRandomInteger32EdgeCase() {
+        List params = List.of("0", "-2147483648", "2147483647", "false", "false");
+        String result = function.execute(params, context);
+        assertNotNull(result);
+        double randomValue = Double.parseDouble(result);
+        assertTrue(randomValue >= -Integer.MAX_VALUE && randomValue < Integer.MAX_VALUE);
+    }
+
+    @Test
+    public void testRandomInteger32MinEqualsMaxEdgeCase() {
+        List params = List.of("0", "3", "3", "false", "false");
+        for (int i = 0; i < 100; i++) {
+            String result = function.execute(params, context);
+            assertNotNull(result);
+            double randomValue = Double.parseDouble(result);
+            assertEquals(randomValue, 3);
+        }
+    }
+
+    // randomDouble('0','3','3','true','true')
+    // randomDouble('0','3','3','true','true')
+
+    @Test
+    public void testRandomDouble32MinEqualsMaxEdgeCase() {
+        List params = List.of("2", "3.0", "3.0", "false", "false");
+        for (int i = 0; i < 100; i++) {
+            String result = function.execute(params, context);
+            assertNotNull(result);
+            double randomValue = Double.parseDouble(result);
+            assertEquals(randomValue, 3);
+        }
+    }
+
+    @Test
+    public void testRandomInteger64EdgeCase() {
+        List params = List.of("0", "-9223372036854775808", "9223372036854775807", "false",
+            "false");
+        String result = function.execute(params, context);
+        assertNotNull(result);
+        double randomValue = Double.parseDouble(result);
+        assertTrue(randomValue >= -Long.MAX_VALUE && randomValue < Long.MAX_VALUE);
+    }
+
+    @Test
+    public void testRandomNumberFloatEdgeCase() {
+        List params = List.of("0", "-3.4028235E38", "3.4028235E38", "false", "false");
+        String result = function.execute(params, context);
+        assertNotNull(result);
+        double randomValue = Double.parseDouble(result);
+        assertTrue(randomValue >= -Float.MAX_VALUE && randomValue < Float.MAX_VALUE);
+    }
+
+    @Test
+    public void testRandomNumberDoubleEdgeCase() {
+        List params = List.of("0", "-1.7976931348623157E308", "1.7976931348623157E308",
+            "false", "false");
+        String result = function.execute(params, context);
+        assertNotNull(result);
+        double randomValue = Double.parseDouble(result);
+        assertTrue(randomValue >= -Double.MAX_VALUE && randomValue < Double.MAX_VALUE);
+    }
+
+    @Test
+    public void testInvalidDecimalPlaces() {
+        List params = List.of("-1"); // invalid decimalPlaces
+        InvalidFunctionUsageException exception = expectThrows(InvalidFunctionUsageException.class,
+            () -> function.execute(params, context));
+        assertEquals(exception.getMessage(),
+            "Decimal places must be a non-negative integer value.");
+    }
+
+    @Test
+    public void testInvalidRange() {
+        List params = List.of("2", "20.5", "10.5"); // invalid range
+        InvalidFunctionUsageException exception = expectThrows(InvalidFunctionUsageException.class,
+            () -> function.execute(params, context));
+        assertEquals(exception.getMessage(),
+            "Min value must be less than max value.");
+    }
+
+    @Test
+    public void testInvalidDecimalPlacesFormat() {
+        List params = List.of("xxx"); // invalid decimalPlaces
+        InvalidFunctionUsageException exception = expectThrows(InvalidFunctionUsageException.class,
+            () -> function.execute(params, context));
+        assertEquals(exception.getMessage(),
+            "Invalid parameter at index 1. xxx must be parsable to Integer.");
+    }
+
+    @Test
+    public void testInvalidMinValueFormat() {
+        List params = List.of("1", "xxx"); // invalid min value
+        InvalidFunctionUsageException exception = expectThrows(InvalidFunctionUsageException.class,
+            () -> function.execute(params, context));
+        assertEquals(exception.getMessage(),
+            "Invalid parameter at index 2. xxx must be parsable to BigDecimal.");
+    }
+
+    @Test
+    public void testInvalidMaxValueFormat() {
+        List params = List.of("1", "1.1", "xxx"); // invalid max value
+        InvalidFunctionUsageException exception = expectThrows(InvalidFunctionUsageException.class,
+            () -> function.execute(params, context));
+        assertEquals(exception.getMessage(),
+            "Invalid parameter at index 3. xxx must be parsable to BigDecimal.");
+    }
+
+    @DataProvider(name = "testRandomNumber")
+    public static Object[][] testRandomNumber() {
+        return new Object[][]{
+
+            {0, 12, null, null, false, false},
+            {0, null, 0, 2, true, true},
+            {0, null, null, null, false, false},
+            {0, null, 0, 100, false, false},
+            {0, null, 0, 2, false, false},
+            {0, null, -100, 0, false, false},
+            {0, null, -2, 0, false, false},
+            {0, null, 0, 100, true, true},
+            {0, null, -100, 0, true, true},
+            {0, null, -2, 0, true, true},
+            {0, null, 0, null, false, false},
+            {0, null, 0, 0, false, false},
+            {0, 11, 0, 12, true, true},
+
+            {0, 13, 0, 100, false, false},
+            {0, 14, 0, 14, false, false},
+            {0, 15, -100, 0, false, false},
+            {0, 16, -16, 0, false, false},
+            {0, 17, 0, 100, true, true},
+            {0, 18, -100, 0, true, true},
+            {0, 19, -20, 0, true, true},
+            {0, 20, 0, null, false, false},
+            {0, 21, 21, 21, false, false},
+
+            {0, null, 0, 2, true, true},
+            {0, null, null, null, false, false},
+            {0, null, 0, 100, false, false},
+            {0, null, 0, 2, false, false},
+            {0, null, -100, 0, false, false},
+            {0, null, -2, 0, false, false},
+            {0, null, 0, 100, true, true},
+            {0, null, -100, 0, true, true},
+            {0, null, -2, 0, true, true},
+            {0, null, 0, null, false, false},
+            {0, null, 0, 0, false, false},
+            {0, 11, 0, 12, true, true},
+            {0, 12, null, null, false, false},
+            {0, 13, 0, 100, false, false},
+            {0, 14, 0, 14, false, false},
+            {0, 15, -100, 0, false, false},
+            {0, 16, -16, 0, false, false},
+            {0, 17, 0, 100, true, true},
+            {0, 18, -100, 0, true, true},
+            {0, 19, -20, 0, true, true},
+            {0, 20, 0, null, false, false},
+            {0, 21, 21, 21, false, false},
+
+            {3, null, 0, 2, true, true},
+            {3, null, null, null, false, false},
+            {3, null, 0, 100, false, false},
+            {3, null, 0, 2, false, false},
+            {3, null, -100, 0, false, false},
+            {3, null, -2, 0, false, false},
+            {3, null, 0, 100, true, true},
+            {3, null, -100, 0, true, true},
+            {3, null, -2, 0, true, true},
+            {3, null, 0, null, false, false},
+            {3, null, 0, 0, false, false},
+            {3, 11.123f, 0, 13, true, true},
+            {3, 12.123f, null, null, false, false},
+            {3, 13.123f, 0, 100, false, false},
+            {3, 14.123f, 0, 14, false, false},
+            {3, 15.123f, -100, 0, false, false},
+            {3, 16.123f, -16, 0, false, false},
+            {3, 17.123f, 0, 100, true, true},
+            {3, 18.123f, -100, 0, true, true},
+            {3, 19.123f, -21, 0, true, true},
+            {3, 20.123f, 0, null, false, false},
+            {3, 21.123f, 21.122f, 21.124f, false, false},
+
+            {5, null, 0, 2, true, true},
+            {5, null, null, null, false, false},
+            {5, null, 0, 100, false, false},
+            {5, null, 0, 2, false, false},
+            {5, null, -100, 0, false, false},
+            {5, null, -2, 0, false, false},
+            {5, null, 0, 100, true, true},
+            {5, null, -100, 0, true, true},
+            {5, null, -2, 0, true, true},
+            {5, null, 0, null, false, false},
+            {5, null, 0, 0, false, false},
+            {5, 11.123d, 0, 13, true, true},
+            {5, 12.123d, null, null, false, false},
+            {5, 13.123d, 0, 100, false, false},
+            {5, 14.123d, 0, 14, false, false},
+            {5, 15.123d, -100, 0, false, false},
+            {5, 16.123d, -16, 0, false, false},
+            {5, 17.123d, 0, 100, true, true},
+            {5, 18.123d, -100, 0, true, true},
+            {5, 19.123d, -21, 0, true, true},
+            {5, 20.123d, 0, null, false, false},
+            {5, 21.123d, 21.122d, 21.124d, false, false},
+
+        };
+    }
+
+    @Test(dataProvider = "testRandomNumber")
+    void testRandomNumber(Number decimalPlaces, Number multipleOf, Number minimum, Number maximum,
+        boolean exclusiveMinimum, boolean exclusiveMaximum) {
+
+        TestContext testContext = new TestContext();
+        AdvancedRandomNumberFunction advancedRandomNumberFunction = new AdvancedRandomNumberFunction();
+        try {
+            for (int i = 0; i < 1000; i++) {
+
+                BigDecimal value = new BigDecimal(advancedRandomNumberFunction.execute(
+                    List.of(toString(decimalPlaces), toString(minimum), toString(maximum),
+                        toString(exclusiveMinimum), toString(exclusiveMaximum), toString(multipleOf)), testContext));
+
+                if (multipleOf != null) {
+                    BigDecimal remainder = value.remainder(new BigDecimal(multipleOf.toString()));
+
+                    assertEquals(
+                        remainder.compareTo(BigDecimal.ZERO), 0,
+                        "Expected %s to be a multiple of %s! Remainder is %s".formatted(
+                            value, multipleOf,
+                            remainder));
+                }
+
+                if (maximum != null) {
+                    if (exclusiveMaximum) {
+                        assertTrue(value.doubleValue() < maximum.doubleValue(),
+                            "Expected %s to be lower than %s!".formatted(
+                                value, maximum));
+                    } else {
+                        assertTrue(value.doubleValue() <= maximum.doubleValue(),
+                            "Expected %s to be lower or equal than %s!".formatted(
+                                value, maximum));
+                    }
+                }
+
+                if (minimum != null) {
+                    if (exclusiveMinimum) {
+                        assertTrue(value.doubleValue() > minimum.doubleValue(),
+                            "Expected %s to be larger than %s!".formatted(
+                                value, minimum));
+                    } else {
+                        assertTrue(value.doubleValue() >= minimum.doubleValue(),
+                            "Expected %s to be larger or equal than %s!".formatted(
+                                value, minimum));
+                    }
+                }
+            }
+        } catch (Exception e) {
+            Assert.fail("Creation of multiple float threw an exception: " + e.getMessage(), e);
+        }
+    }
+
+    private String toString(Object obj) {
+        if (obj == null) {
+            return "null";
+        }
+        return obj.toString();
+
+    }
+
+    private  T expectThrows(Class exceptionClass, Runnable runnable) {
+        try {
+            runnable.run();
+        } catch (Throwable throwable) {
+            if (exceptionClass.isInstance(throwable)) {
+                return exceptionClass.cast(throwable);
+            } else {
+                throw new AssertionError("Unexpected exception type", throwable);
+            }
+        }
+        throw new AssertionError("Expected exception not thrown");
+    }
+}
\ No newline at end of file
diff --git a/core/citrus-base/src/test/java/org/citrusframework/functions/core/RandomDoubleFunctionTest.java b/core/citrus-base/src/test/java/org/citrusframework/functions/core/RandomDoubleFunctionTest.java
deleted file mode 100644
index 1452fb881b..0000000000
--- a/core/citrus-base/src/test/java/org/citrusframework/functions/core/RandomDoubleFunctionTest.java
+++ /dev/null
@@ -1,246 +0,0 @@
-/*
- * Copyright the original author or authors.
- *
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- *
- *     http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
- * See the License for the specific language governing permissions and
- * limitations under the License.
- */
-
-package org.citrusframework.functions.core;
-
-import static org.testng.Assert.assertEquals;
-import static org.testng.Assert.assertNotNull;
-import static org.testng.Assert.assertTrue;
-
-import java.math.BigDecimal;
-import java.util.List;
-import org.citrusframework.context.TestContext;
-import org.citrusframework.exceptions.InvalidFunctionUsageException;
-import org.testng.annotations.BeforeMethod;
-import org.testng.annotations.Test;
-
-public class RandomDoubleFunctionTest {
-
-    private AdvancedRandomNumberFunction function;
-    private TestContext context;
-
-    @BeforeMethod
-    public void setUp() {
-        function = new AdvancedRandomNumberFunction();
-        context = new TestContext();
-    }
-
-    @Test
-    public void testRandomNumberWithNullParameter() {
-        InvalidFunctionUsageException exception = expectThrows(InvalidFunctionUsageException.class,
-            () -> function.execute(null, context));
-        assertEquals(exception.getMessage(),
-            "Function parameters must not be null.");
-    }
-
-    @Test
-    public void testRandomNumberWithDefaultValues() {
-        List params = List.of();
-        String result = function.execute(params, context);
-        assertNotNull(result);
-        assertTrue(result.matches("-?\\d*"));
-    }
-
-    @Test
-    public void testRandomNumberWithDecimalPlaces() {
-        List params = List.of("2");
-        String result = function.execute(params, context);
-        assertNotNull(result);
-        assertTrue(result.matches("-?\\d*\\.\\d{2}"), "result does not match pattern: "+result);
-    }
-
-    @Test
-    public void testRandomNumberWithinRange() {
-        List params = List.of("2", "10.5", "20.5");
-        String result = function.execute(params, context);
-        assertNotNull(result);
-        double randomValue = Double.parseDouble(result);
-        assertTrue(randomValue >= 10.5 && randomValue <= 20.5);
-    }
-
-    @Test
-    public void testRandomNumberIncludesMin() {
-        List params = List.of("1", "10.5", "20.5");
-        function = new AdvancedRandomNumberFunction() {
-            @Override
-            double getRandomValue(double minValue, BigDecimal range, double random) {
-                random = 0.0;
-                return super.getRandomValue(minValue, range, random);
-            }
-        };
-        String result = function.execute(params, context);
-        assertEquals(result, "10.5");
-    }
-
-    @Test
-    public void testRandomNumberIncludesMax() {
-        List params = List.of("1", "10.5", "20.5");
-        function = new AdvancedRandomNumberFunction() {
-            @Override
-            double getRandomValue(double minValue, BigDecimal range, double random) {
-                random = 1.0;
-                return super.getRandomValue(minValue, range, random);
-            }
-        };
-        String result = function.execute(params, context);
-        assertEquals(result, "20.5");
-    }
-
-    @Test
-    public void testRandomNumberExcludeMin() {
-        List params = List.of("1", "10.5", "20.5", "true", "false");
-        function = new AdvancedRandomNumberFunction() {
-            @Override
-            double getRandomValue(double minValue, BigDecimal range, double random) {
-                random = 0.0;
-                return super.getRandomValue(minValue, range, random);
-            }
-        };
-        String result = function.execute(params, context);
-        assertNotNull(result);
-        double randomValue = Double.parseDouble(result);
-        assertTrue(randomValue > 10.5 && randomValue <= 20.5);
-    }
-
-    @Test
-    public void testRandomNumberExcludeMax() {
-        List params = List.of("2", "10.5", "20.5", "false", "true");
-        function = new AdvancedRandomNumberFunction() {
-            @Override
-            double getRandomValue(double minValue, BigDecimal range, double random) {
-                random = 1.0;
-                return super.getRandomValue(minValue, range, random);
-            }
-        };
-        String result = function.execute(params, context);
-        assertNotNull(result);
-        double randomValue = Double.parseDouble(result);
-        assertTrue(randomValue >= 10.5 && randomValue < 20.5);
-    }
-
-    @Test
-    public void testRandomInteger32EdgeCase() {
-        List params = List.of("0", "-2147483648", "2147483647", "false", "false");
-        String result = function.execute(params, context);
-        assertNotNull(result);
-        double randomValue = Double.parseDouble(result);
-        assertTrue(randomValue >= -Integer.MAX_VALUE && randomValue < Integer.MAX_VALUE);
-    }
-
-    @Test
-    public void testRandomInteger32MinEqualsMaxEdgeCase() {
-        List params = List.of("0", "3", "3", "false", "false");
-        for (int i =0;i<100;i++) {
-            String result = function.execute(params, context);
-            assertNotNull(result);
-            double randomValue = Double.parseDouble(result);
-            assertEquals(randomValue, 3);
-        }
-    }
-
-
-
-    // randomDouble('0','3','3','true','true')
-    // randomDouble('0','3','3','true','true')
-
-    @Test
-    public void testRandomDouble32MinEqualsMaxEdgeCase() {
-        List params = List.of("2", "3.0", "3.0", "false", "false");
-        for (int i =0;i<100;i++) {
-            String result = function.execute(params, context);
-            assertNotNull(result);
-            double randomValue = Double.parseDouble(result);
-            assertEquals(randomValue, 3);
-        }
-    }
-
-    @Test
-    public void testRandomInteger64EdgeCase() {
-        List params = List.of("0", "-9223372036854775808", "9223372036854775807", "false", "false");
-        String result = function.execute(params, context);
-        assertNotNull(result);
-        double randomValue = Double.parseDouble(result);
-        assertTrue(randomValue >=-Long.MAX_VALUE && randomValue < Long.MAX_VALUE);
-    }
-
-    @Test
-    public void testRandomNumberFloatEdgeCase() {
-        List params = List.of("0", "-3.4028235E38", "3.4028235E38", "false", "false");
-        String result = function.execute(params, context);
-        assertNotNull(result);
-        double randomValue = Double.parseDouble(result);
-        assertTrue(randomValue >= -Float.MAX_VALUE && randomValue < Float.MAX_VALUE);
-    }
-
-    @Test
-    public void testRandomNumberDoubleEdgeCase() {
-        List params = List.of("0", "-1.7976931348623157E308", "1.7976931348623157E308", "false", "false");
-        String result = function.execute(params, context);
-        assertNotNull(result);
-        double randomValue = Double.parseDouble(result);
-        assertTrue(randomValue >= -Double.MAX_VALUE && randomValue < Double.MAX_VALUE);
-    }
-
-    @Test
-    public void testInvalidDecimalPlaces() {
-        List params = List.of("-1"); // invalid decimalPlaces
-        InvalidFunctionUsageException exception = expectThrows(InvalidFunctionUsageException.class, () -> function.execute(params, context));
-        assertEquals(exception.getMessage(), "Invalid parameter definition. Decimal places must be a non-negative integer value.");
-    }
-
-    @Test
-    public void testInvalidRange() {
-        List params = List.of("2", "20.5", "10.5"); // invalid range
-        InvalidFunctionUsageException exception = expectThrows(InvalidFunctionUsageException.class, () -> function.execute(params, context));
-        assertEquals(exception.getMessage(), "Invalid parameter definition. Min value must be less than max value.");
-    }
-
-    @Test
-    public void testInvalidDecimalPlacesFormat() {
-        List params = List.of("xxx"); // invalid decimalPlaces
-        InvalidFunctionUsageException exception = expectThrows(InvalidFunctionUsageException.class, () -> function.execute(params, context));
-        assertEquals(exception.getMessage(), "Invalid parameter at index 1. xxx must be parsable to Integer.");
-    }
-
-    @Test
-    public void testInvalidMinValueFormat() {
-        List params = List.of("1","xxx"); // invalid min value
-        InvalidFunctionUsageException exception = expectThrows(InvalidFunctionUsageException.class, () -> function.execute(params, context));
-        assertEquals(exception.getMessage(), "Invalid parameter at index 2. xxx must be parsable to Double.");
-    }
-
-    @Test
-    public void testInvalidMaxValueFormat() {
-        List params = List.of("1", "1.1", "xxx"); // invalid max value
-        InvalidFunctionUsageException exception = expectThrows(InvalidFunctionUsageException.class,
-            () -> function.execute(params, context));
-        assertEquals(exception.getMessage(),
-            "Invalid parameter at index 3. xxx must be parsable to Double.");
-    }
-
-    private  T expectThrows(Class exceptionClass, Runnable runnable) {
-        try {
-            runnable.run();
-        } catch (Throwable throwable) {
-            if (exceptionClass.isInstance(throwable)) {
-                return exceptionClass.cast(throwable);
-            } else {
-                throw new AssertionError("Unexpected exception type", throwable);
-            }
-        }
-        throw new AssertionError("Expected exception not thrown");
-    }
-}
\ No newline at end of file
diff --git a/core/citrus-base/src/test/java/org/citrusframework/functions/core/RandomStringFunctionTest.java b/core/citrus-base/src/test/java/org/citrusframework/functions/core/RandomStringFunctionTest.java
index 34b982a486..381adc2825 100644
--- a/core/citrus-base/src/test/java/org/citrusframework/functions/core/RandomStringFunctionTest.java
+++ b/core/citrus-base/src/test/java/org/citrusframework/functions/core/RandomStringFunctionTest.java
@@ -17,8 +17,10 @@
 package org.citrusframework.functions.core;
 
 import java.util.ArrayList;
+import java.util.HashSet;
 import java.util.List;
 
+import java.util.Set;
 import org.citrusframework.UnitTestSupport;
 import org.citrusframework.exceptions.InvalidFunctionUsageException;
 import org.testng.Assert;
@@ -28,7 +30,8 @@
 import static java.util.Collections.singletonList;
 
 public class RandomStringFunctionTest extends UnitTestSupport {
-    private RandomStringFunction function = new RandomStringFunction();
+
+    private final RandomStringFunction function = new RandomStringFunction();
 
     @Test
     public void testFunction() {
@@ -110,8 +113,31 @@ public void testTooManyParameters() {
         params.add("3");
         params.add("UPPERCASE");
         params.add("true");
-        params.add("too much");
+        params.add("0");
+        params.add("too many");
 
         function.execute(params, context);
     }
-}
+
+    @Test
+    public void testRandomSize() {
+        List params;
+        params = new ArrayList<>();
+        params.add("10");
+        params.add("UPPERCASE");
+        params.add("true");
+        params.add("8");
+
+        Set sizes = new HashSet<>();
+
+        for (int i = 0; i < 1000; i++) {
+            String text = function.execute(params, context);
+            sizes.add(text.length());
+        }
+
+        Assert.assertTrue(sizes.contains(8));
+        Assert.assertTrue(sizes.contains(9));
+        Assert.assertTrue(sizes.contains(10));
+
+    }
+}
\ No newline at end of file