Regex feeder (#11)

close #5

.gitignore

@@ -8,4 +8,5 @@
 *.log
 *.html
 /example/target/
-/example/example.iml
+/example/example.iml
+*.sc

build.sbt

@@ -12,6 +12,7 @@ lazy val root = (project in file("."))
     libraryDependencies ++= requests,
     libraryDependencies ++= pureConfig,
     libraryDependencies ++= scalaTesting,
+    libraryDependencies ++= generex,
     scalacOptions := Seq(
       "-encoding",
       "UTF-8",

example/src/test/scala/ru/tinkoff/load/example/feeders/Feeders.scala

@@ -71,4 +71,7 @@ object Feeders {
   //tranform List to Feeder
   val list2feeder = List(1, 2, 3).toFeeder("listId").circular
 
+  // string sequentially generated from the specified pattern
+  val regexString = RegexFeeder("regex", "[a-zA-Z0-9]{8}")
+
 }

example/src/test/scala/ru/tinkoff/load/example/scenarios/SampleScenario.scala

@@ -33,6 +33,7 @@ class SampleScenario {
     .feed(gluedTogetherFeeder)
     .feed(list2feeder)
     .feed(finiteRandomDigitsWithTransform)
+    .feed(regexString)
     .exec(getMainPage)
 
 }

project/Dependencies.scala

@@ -35,6 +35,10 @@ object Dependencies {
     "org.scalamock" %% "scalamock" % "4.4.0" % "test"
   )
 
+  lazy val generex: Seq[ModuleID] = Seq(
+    "com.github.mifmif" % "generex" % "1.0.2"
+  )
+
   lazy val scalaTesting: Seq[ModuleID] = scalaCheck ++ scalaTest ++ scalaMock
 
 }

src/main/scala/ru/tinkoff/gatling/feeders/RegexFeeder.scala

@@ -0,0 +1,13 @@
+package ru.tinkoff.gatling.feeders
+
+import io.gatling.core.feeder.Feeder
+import com.mifmif.common.regex.Generex
+
+object RegexFeeder {
+
+  def apply(paramName: String, regex: String): Feeder[String] = {
+    val generex = new Generex(regex).iterator()
+    feeder[String](paramName)(generex.next())
+  }
+
+}

src/test/scala/ru/tinkoff/gatling/feeders/RandomFeedersSpec.scala

@@ -23,6 +23,8 @@ class RandomFeedersSpec extends AnyFlatSpec with Matchers {
 
   val uuidPattern = "([a-f0-9]{8}(-[a-f0-9]{4}){4}[a-f0-9]{8})"
 
+  val regexPattern = "[a-z0-9]{9}"
+
   it should "create RandomDateFeeder with specified date pattern" in {
     forAll(rndString, positiveInt, positiveInt) { (paramName, positive, negative) =>
       (positive > negative) ==>
@@ -111,6 +113,14 @@ class RandomFeedersSpec extends AnyFlatSpec with Matchers {
     }.check
   }
 
+  it should "create RegexFeeder with specified regex pattern" in {
+    forAll(rndString) { (paramName) =>
+      RegexFeeder(paramName, regexPattern)
+        .take(50)
+        .forall(r => r(paramName).matches(regexPattern))
+    }
+  }
+
   it should "create SequentialFeeder" in {
     forAll(rndString, positiveInt, positiveInt) { (paramName, start, step) =>
       val list = SequentialFeeder(paramName, start, step).take(50).toList.flatten