A practical guide comparing unit, integration, and E2E tests in JUnit 6. Covers precise definitions, full code examples for each layer, speed and reliability trade-offs, recommended proportions, and guidance on when to write each type.
A complete guide to JUnit 6 test reporting: Maven Surefire HTML reports, Allure Framework with @Step and @Feature annotations, custom TestExecutionListener HTML reports, Allure in GitHub Actions CI, and guidance on choosing the right reporting tool for your audience.
A complete JaCoCo setup guide for JUnit 6 projects. Covers Maven and Gradle plugin configuration, coverage metrics explained, HTML report interpretation, enforcing minimum thresholds in CI, excluding generated code, and integrating with SonarQube.
Complete CI/CD pipeline configurations for JUnit 6 tests: GitHub Actions workflows with parallel stages, caching, and coverage gates; Jenkins declarative pipelines with JUnit result publishing; Testcontainers in CI environments; and Maven Surefire optimisation for CI.
A comprehensive guide to managing test data in JUnit 6 projects. Covers inline data, Object Mother, Test Data Builder, @Sql scripts, database seeders, Faker libraries, and strategies for cleaning up test data across unit, slice, and integration test layers.
A complete guide to testing microservices with JUnit 6: single-service integration tests with WireMock, consumer-driven contract tests with Spring Cloud Contract, and end-to-end tests with Docker Compose and Testcontainers. Covers async event testing and state management strategies.
A practical comparison of H2 in-memory, shared real database, and Testcontainers for database testing in JUnit 6 projects. Includes code examples for all three approaches, trade-off analysis, and a decision guide for choosing the right strategy per scenario.
A complete guide to using Testcontainers with JUnit 6 for real database integration testing. Covers PostgreSQL container setup, Spring Boot @DynamicPropertySource integration, singleton pattern for performance, multi-service containers, and CI/CD pipeline compatibility.
A complete guide to using Mockito with JUnit 6: @Mock, @Spy, @InjectMocks, @Captor, stubbing with when/thenReturn, argument matchers, verifying interactions, ArgumentCaptor, InOrder verification, and best practices for effective test isolation.
A complete guide to testing REST APIs with JUnit 6 using both MockMvc and WebTestClient. Covers GET, POST, PUT, DELETE testing, JSON path assertions, validation error testing, file uploads, authentication, and a matcher quick-reference table.