spring-boot-test-patterns
Comprehensive testing patterns for Spring Boot applications covering unit, slice, integration, and container-based tests.
- Covers four test types with performance targets: unit tests (< 50ms), slice tests (< 100ms), integration tests (< 500ms), and full context tests with Testcontainers
- Includes patterns for Mockito-based unit testing, JPA/MVC slice testing with focused Spring contexts, and REST API testing with MockMvc and WebTestClient
- Demonstrates Spring Boot 3.5+
@ServiceConnectionfor cleaner container management and@DynamicPropertySourcefor dynamic property registration - Provides context caching strategies, container reuse patterns, and CI/CD configuration examples for GitHub Actions and Docker Compose
Spring Boot Testing Patterns
Overview
Comprehensive guidance for writing robust test suites for Spring Boot applications using JUnit 5, Mockito, Testcontainers, and performance-optimized slice testing patterns.
When to Use
- Writing unit tests for services or repositories with mocked dependencies
- Implementing integration tests with real databases via Testcontainers
- Testing REST APIs with
@WebMvcTestor MockMvc - Configuring
@ServiceConnectionfor container management in Spring Boot 3.5+
Quick Reference
| Test Type | Annotation | Target Time | Use Case |
|---|---|---|---|
| Unit Tests | @ExtendWith(MockitoExtension.class) |
< 50ms | Business logic without Spring context |
| Repository Tests | @DataJpaTest |
< 100ms | Database operations with minimal context |
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