Kotlin DSL for WireMock

This is library provides handy kotlin dsl for WireMock stubbing. Read more about WireMock and Kotlin here.

Getting started

Gradle

  testImplementation("com.marcinziolo:kotlin-wiremock:version")

Maven

<dependency>
    <groupId>com.marcinziolo</groupId>
    <artifactId>kotlin-wiremock</artifactId>
    <version>:version</version>
    <scope>test</scope>
</dependency>

Features

• Request Matching

  • Http methods (post/get/put/delete/patch/options/head/trace/any)

    wiremock.post {
        url equalTo "/users/1"
    } returnsJson {
      body = """
      {
        "id": 1,
        "name": "Bob"
      }
      """
    }
    

  • JSON body - with strong type checking of json value

    wiremock.post {
        body contains "id" equalTo 1
        body contains "name" like "Alice"
        body contains "isAdmin" equalTo true
        body contains "points" equalTo 3.0
        body contains "lastName" // just checking if key exists
    }
    

  • Headers

    wiremock.post {
        headers contains "User-Agent" like "Firefox.*" 
    }
    

  • Query parameters

    wiremock.post {
        urlPath equalTo "/users/1"
        queryParams contains "page" like "1.*" 
    }  
    

  • Priority

    wiremock.post {
        url equalTo "/test"
        priority = 2
    } returnsJson  {
        statusCode = 403
    }
    
    wiremock.post {
        url equalTo "/test"
        headers contains "Authorization"
        priority = 1
    } returnsJson  {
        statusCode = 200
    }
    

  • Cookies

• Response specification

  • Returns

    wiremock.get {
        url equalTo "/users/1"
    } returns {
        statusCode = 200
        header = "Content-Type" to "application/json"
        body = """
        {
          "id": 1,
          "name": "Bob"
        }
        """
    }
    

  • Or easier returnsJson

    wiremock.get {
        url equalTo "/users/1"
    } returnsJson {
        body = """
        {
          "id": 1,
          "name": "Bob"
        }
        """
    }
    

  • Delays

    wiremock.post {
        url equalTo "/users"
    } returnsJson {
        delay fixedMs 100
        //or gaussian distribution
        delay medianMs 100 sigma 0.1
    }       
    

• Chaining

   val bobResponse: SpecifyResponse = {
       body = """
           {
             "id": 1,
             "name": "Bob"
           }
           """
   }
  
   wiremock.post {
       url equalTo "/users"
   } and {
       body contains "id" equalTo 1
   } and {
       body contains "isAdmin" equalTo true
   } returns {
       header = "Content-Type" to "application/json"
   } and bobResponse and {
       statusCode = 201
   }
  

• Scenarios - stateful behaviour

   wiremock.post {
       url equalTo "/users"
   } returnsJson bobResponse and {
       toState = "Alice"
   }
  
   wiremock.post {
       url equalTo "/users"
       whenState = "Alice"
   } returnsJson aliceResponse and {
       clearState = true
   }
  

• Verification api

   wm.verify {
      headers contains "User-Agent" equalTo "curl"
      queryParams contains "filter" equalTo "true"
      cookies contains "cookieKey" equalTo "cookieValue"
      body contains "pet" equalTo "dog"
  }
  
  //exactly
  wm.verify {
    urlPath equalTo "/users/1"
    exactly = 1
  } moreThan 2 //lessThan lessThanOrEqual  moreThanOrEqual
  
  //atLeast atMost
  wm.verify {
    urlPath equalTo "/users/1"
    atLeast = 1
    atMost = 3
  }
  

• WiremMckTest Junit5 extension

  class Junit5RegisterExtensionTest {
  
      @JvmField
      @RegisterExtension
      var wm = WireMockExtension.newInstance()
              .options(wireMockConfig().dynamicPort())
              .build()
  
      @Test
      fun testGet() {
          wm.get {
              url equalTo "/hello"
          } returns {
              statusCode = 200
          }
  
          When {
              get("${wm.baseUrl()}/hello")
          } Then {
              statusCode(200)
          }
      }
  }
  

More examples

• Examples.kt
• JUnit4 example
• Junit5 base class
• Verification test cases
• WithBuilderTests - extension point for using original wiremock api and its extensions(like webhooks)

Compatibility

The Library is compatible with WireMock - 2.8.0 and higher

Release notes