Run tests and next steps

Run the tests

$ ./mvnw test

Or with Gradle:

$ ./gradlew test

You should see the WireMock Docker container start in the console output. It acts as the photo service, serving mock responses based on the configured expectations. All tests should pass.

Summary

You built a Micronaut application that integrates with an external REST API using declarative HTTP clients, then tested that integration using WireMock and the Testcontainers WireMock module. Testing at the HTTP protocol level instead of mocking Java methods lets you catch serialization issues and simulate realistic failure scenarios.

Tip

Testcontainers WireMock modules are available for Go and Python as well.

To learn more about Testcontainers, visit the Testcontainers overview.

Further reading

• Testcontainers WireMock module
• WireMock documentation
• Testcontainers JUnit 5 quickstart
• Testing REST API integrations in Spring Boot using WireMock