Learn how to write integration tests with @SpringBootTest. Learn different options for customizing the application context for the tests.
Learn how to test WebClient REST calls with MockWebServer. Learn the responsibilities of a web client and how to test them.
Learn how to test JSON serialization in Spring Boot using @JsonTest. Learn why to test serialization separately and how.
Learn how to test Spring Boot repositories using @DataJpaTest. Learn what should be tested on the persistence layer and how.
Learn how to test Spring Boot web controllers using @WebMvcTest. Learn what responsibilities a controller has and how to test them.
Learn how to write unit tests for Spring Boot applications. Learn the technical details necessary to write good unit tests.
Learn how to write JUnit 5 nested tests. Learn how to provide a hierarchical structure to describe relationships between the tests.
Learn how to use the Mockito mocking framework with JUnit 5. Learn both the test framework independent way, and using the Mockito JUnit 5 extension.
Learn how to run code before and after each test or all tests in the test class. Also learn the execution order of lifecycle methods in different cases.
Learn how to assert an exception is thrown using JUnit 5. Also, learn how to check the error message of the thrown exception.