E58d98e4bd93e38386e382b9e38388 Articles

Writing Tests in Spring Boot - Introduction to Unit Testing with JUnit and Mockito

Learn how to write Spring Boot unit tests with JUnit 5 and Mockito, explained step by step for the Service layer (@Mock/@InjectMocks) and Controller layer (@WebMvcTest/@MockBean/MockMvc). Master the Given-When-Then pattern, success/failure cases, and assertThrows through concrete code examples.

2026-01-09