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wiremock-testcontainers-java

★ 66 Open GitHub ↗

WireMock module for Testcontainers for Java

// repository documentation

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# Testcontainers Java module for WireMock

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> 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](https://github.com/wiremock/wiremock-docker).

While you can run [WireMock Java](https://github.com/wiremock/wiremock)
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](https://github.com/wiremock/wiremock-testcontainers-java/issues/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](https://jitpack.io/) to add the dependency in your projects.

#### Maven

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

#### Gradle

```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

<details>
<summary>
JitPack / Maven
</summary>

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

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

</details>

<details>
<summary>
JitPack / Gradle
</summary>

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

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

```

</details>

### Using the test container in JUnit 5

P.S: Javadoc is coming soon!

#### Sample Code using JUnit 5

```java
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](https://wiremock.org/docs/extending-wiremock/)
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](https://maven.apache.org/plugins/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](https://github.com/9cookies/wiremock-extensions).

Copying the dependency:

```xml
      <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:

```json
{
  "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

```java
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](./CONTRIBUTING.md).

wiremock-testcontainers-java

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