521-frameworks-micronaut-testing-unit-tests

Write unit tests for Micronaut applications using a Mockito-first approach. Utilize @MockBean to mock collaborators and configure deterministic behaviors, reducing unnecessary full context loading.

The best way to mock Micronaut beans is using the @MockBean annotation. This allows precise collaborator mocking without requiring full framework context initialization for every test case.

Reduce unnecessary @MicronautTest usage by adopting a Mockito-first testing strategy. Mock bean collaborators directly to isolate logic and avoid expensive context initialization overhead in unit tests.

Yes, you can use parameterized tests with @ParameterizedTest and override configurations deterministically using @Property. This ensures isolated data-driven testing within Micronaut projects.

Yes, this testing approach facilitates HttpClient assertions. It enables precise validation of HTTP interactions while maintaining a mocked environment for external collaborators.

You should avoid @MicronautTest when pure unit testing logic without context overhead is needed. Instead, mock collaborators using Mockito to isolate services and ensure fast test execution.