Testcontainers Java module for WireMock

NOTE: This project is under development, the GitHub Packages release is coming soon. Not all WireMock features are supported at the moment, and there might be incompatible changes before the 1.0 release. Contributions are welcome!

This module allows provisioning the WireMock server as a standalone container within your unit tests, based on WireMock Docker.

While you can run WireMock Java with the same result for the most of the use-cases, it might be helpful to isolate JVMs or to run on Java versions and platforms not supported by WireMock. A common example is using Wiremock 3.x with Java 1.8.

Compatibility

WireMock

The module is compatible with the following WireMock versions:

• WireMock (aka WireMock Java) 2.0.0 and above
• WireMock (aka WireMock Java) 3.x versions. Note that the official image for WireMock 3 is yet to be released and verified (issue #59)

Other WireMock implementations may work but have not been tested yet. Please feel free to contribute the integration tests and compatibility layers!

Test Frameworks

Versions before 1.0-alpha-16 were tested with JUnit 4 and JUnit 5. Newer versions were updates to Testcontainers 2 and hence require JUnit 5. All JUnit 5 compatible test frameworks should work.

Java

The module is compatible with Java 8 and above.s

Usage

Importing the dependency

The module is published to Maven Central and GitHub Packages. You can also use JitPack to add the dependency in your projects.

Maven

<dependency>
  <groupId>org.wiremock.integrations.testcontainers</groupId>
  <artifactId>wiremock-testcontainers-module</artifactId>
  <version>${see the releases}</version>
  <scope>test</scope>
</dependency>

Gradle

dependencies {
  testImplementation 'org.wiremock.integrations.testcontainers:wiremock-testcontainers-module:${wiremock-testcontainers.version}'
}

GitHub Packages

GitHub Packages uses the official Maven coordinates (same as Maven Central above), but you will need to configure the server and authentication.

JitPack

JitPack / Maven

  <dependencies>
    <dependency>
      <groupId>com.github.wiremock</groupId>
      <artifactId>wiremock-testcontainers-java</artifactId>
      <version>${wiremock-testcontainers.version}</version>
      <scope>test</scope>
    </dependency>
    <!-- .... Other Dependencies -->
  </dependencies>

  <repositories>
    <repository>
      <id>jitpack.io</id>
      <url>https://jitpack.io</url>
    </repository>
  </repositories>

JitPack / Gradle

  allprojects {
		repositories {
			maven { url 'https://jitpack.io' }
		}
	}

  dependencies {
		testImplementation 'com.github.wiremock:wiremock-testcontainers-java:${wiremock-testcontainers.version}'
	}

Using the test container in JUnit 5

P.S: Javadoc is coming soon!

Sample Code using JUnit 5

import org.junit.jupiter.api.*;
import org.wiremock.integrations.testcontainers.testsupport.http.*;

import static org.assertj.core.api.Assertions.assertThat;

@Testcontainers
class WireMockContainerJunit5Test {

    @Container
    WireMockContainer wiremockServer = new WireMockContainer("wiremock/wiremock:2.35.0")
            .withMapping("hello", WireMockContainerJunit5Test.class, "hello-world.json");

    @BeforeEach
    public void setup() {
        wiremockServer.start();
        assertThat(wiremockServer.isRunning()).isTrue();
    }
    
    @Test
    void helloWorld() throws Exception {
        // given
        String url = wiremockServer.getUrl("/hello");

        // when
        HttpResponse response = new TestHttpClient().get(url);

        // then
        assertThat(response.getBody())
                .as("Wrong response body")
                .contains("Hello, world!");
    }
}

Using WireMock extensions

The API supports adding WireMock extensions to the test container. The extension can be sourced from the classpath for bundled extensions, or added from the JAR file in the initializer.

Using external extensions

For the external extensions, an extension Jar should be pulled to the test directory before running the test. Apache Maven Dependency Plugin can be used for this purpose. Make sure that all dependencies of the extension JAR, if any, are also included.

Below you can see an examples of using the JSON Body Transformer extension from the 9cookies/wiremock-extensions.

Copying the dependency:

      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-dependency-plugin</artifactId>
        <version>3.5.0</version>
        <executions>
          <execution>
            <id>copy</id>
            <phase>package</phase>
            <goals>
              <goal>copy</goal>
            </goals>
            <configuration>
              <artifactItems>
                <artifactItem>
                  <groupId>com.ninecookies.wiremock.extensions</groupId>
                  <artifactId>wiremock-extensions</artifactId>
                  <version>0.4.1</version>
                  <classifier>jar-with-dependencies</classifier>
                </artifactItem>
              </artifactItems>
              <outputDirectory>${project.build.directory}/test-wiremock-extension</outputDirectory>
            </configuration>
          </execution>
        </executions>
      </plugin>

Mapping definition:

{
  "request": {
    "method": "POST",
    "url": "/json-body-transformer"
  },
  "response": {
    "status": 201,
    "headers": {
      "content-type": "application/json"
    },
    "jsonBody": {
      "message": "Hello, $(name)!"
    },
    "transformers" : ["json-body-transformer"]
  }
}

Test sample:

Sample code using JUnit 5

import org.junit.jupiter.api.*;
import org.wiremock.integrations.testcontainers.testsupport.http.*;

import java.nio.file.Paths;
import java.util.Collections;

import static org.assertj.core.api.Assertions.assertThat;

class WireMockContainerExtensionJunit5Test {
    
    WireMockContainer wiremockServer = new WireMockContainer("wiremock/wiremock:2.35.0")
            .withMapping("json-body-transformer", WireMockContainerExtensionJunit5Test.class, "json-body-transformer.json")
            .withExtension("JSON Body Transformer",
                    Collections.singleton("com.ninecookies.wiremock.extensions.JsonBodyTransformer"),
                    Collections.singleton(Paths.get("target", "test-wiremock-extension", "wiremock-extensions-0.4.1-jar-with-dependencies.jar").toFile()));

    @BeforeEach
    public void setup() {
       wiremockServer.start();
        assertThat(wiremockServer.isRunning()).isTrue();
    }
    
    @Test
    void testJSONBodyTransformer() throws Exception {
        // given
        String url = wiremockServer.getUrl("/json-body-transformer");
        String body = "{\"name\":\"John Doe\"}";

        // when
        HttpResponse response = new TestHttpClient().post(url, body);

        // then
        assertThat(response.getBody()).as("Wrong response body")
                .contains("Hello, John Doe!");
    }
}

Contributing

See the Contributor Guide.