The Spring TestContext Framework (located in the org.springframework.test.context package) provides generic, annotation-driven unit and integration testing support that is agnostic of the testing framework in use. The TestContext framework also places a great deal of importance on convention over configuration, with reasonable defaults that you can override through annotation-based configuration.spring-doc.cn

In addition to generic testing infrastructure, the TestContext framework provides explicit support for JUnit 4, JUnit Jupiter (AKA JUnit 5), and TestNG. For JUnit 4 and TestNG, Spring provides abstract support classes. Furthermore, Spring provides a custom JUnit Runner and custom JUnit Rules for JUnit 4 and a custom Extension for JUnit Jupiter that let you write so-called POJO test classes. POJO test classes are not required to extend a particular class hierarchy, such as the abstract support classes.spring-doc.cn

The following section provides an overview of the internals of the TestContext framework. If you are interested only in using the framework and are not interested in extending it with your own custom listeners or custom loaders, feel free to go directly to the configuration (context management, dependency injection, transaction management ), support classes, and annotation support sections.spring-doc.cn