Add Tests

ecs-logging-access/src/test/groovy/com/raynigon/ecs/logging/access/client/RestClientConfigurationSpec.groovy

@@ -0,0 +1,96 @@
+package com.raynigon.ecs.logging.access.client
+
+import org.slf4j.MDC
+import org.springframework.http.HttpHeaders
+import org.springframework.http.HttpStatus
+import org.springframework.http.HttpStatusCode
+import org.springframework.http.client.ClientHttpRequest
+import org.springframework.http.client.ClientHttpRequestFactory
+import org.springframework.http.client.ClientHttpResponse
+import org.springframework.web.client.DefaultRestClient
+import org.springframework.web.client.RestClient
+import spock.lang.Specification
+
+import static com.raynigon.ecs.logging.LoggingConstants.TRANSACTION_ID_HEADER
+import static com.raynigon.ecs.logging.LoggingConstants.TRANSACTION_ID_PROPERTY
+
+class RestClientConfigurationSpec extends Specification {
+
+    def 'interceptor is added to rest client builder'() {
+        given:
+        RestClient.Builder builder = Mock()
+
+        and:
+        RestClientConfiguration configuration = new RestClientConfiguration()
+
+        when:
+        configuration.customize(builder)
+
+        then:
+        1 * builder.requestInterceptor(_)
+    }
+
+
+    @SuppressWarnings('GroovyAccessibility')
+    def 'interceptor is added to rest client derived from builder'() {
+        given:
+        RestClient.Builder builder = RestClient.builder()
+
+        and:
+        RestClientConfiguration configuration = new RestClientConfiguration()
+
+        when:
+        configuration.customize(builder)
+
+        and: "A RestClient is created from the builder"
+        RestClient client = builder.build()
+
+        and: "Check the field in the DefaultRestClient"
+        def field = DefaultRestClient.class.getDeclaredField("interceptors")
+        field.setAccessible(true)
+
+        then:
+        field.get(client).size() == 1
+    }
+
+    def 'interceptor adds transaction id'() {
+        given: "A ClientHttpRequestFactory"
+        ClientHttpRequestFactory requestFactory = Mock()
+        ClientHttpRequest request = Mock()
+        requestFactory.createRequest(_, _) >> request
+
+        and: "A HttpRequest with headers"
+        HttpHeaders headers = new HttpHeaders()
+        request.getHeaders() >> headers
+        request.getAttributes() >> [:]
+
+        and: "A HttpResponse"
+        ClientHttpResponse response = Mock()
+        request.execute() >> response
+        response.statusCode >> HttpStatus.OK
+
+        and: "A RestClient Builder"
+        RestClient.Builder builder = RestClient.builder()
+                .requestFactory(requestFactory)
+
+        and: "A RestClientConfiguration"
+        RestClientConfiguration configuration = new RestClientConfiguration()
+
+        and: "A transaction id in the MDC"
+        MDC.clear()
+        MDC.put(TRANSACTION_ID_PROPERTY, "test-123")
+
+        when: "The configuration is applied to the builder"
+        configuration.customize(builder)
+
+        and: "A RestClient is created from the builder"
+        RestClient client = builder.build()
+
+        and: "A request is executed"
+        client.get().uri("https://google.com").retrieve().toBodilessEntity()
+
+        then: "The transaction id is added to the request"
+        headers.containsKey(TRANSACTION_ID_HEADER)
+        headers.get(TRANSACTION_ID_HEADER).first() == "test-123"
+    }
+}