Spring Boot Test: Load Main Class

When conducting unit tests using Spring Boot, it is necessary to load the main class in order to access the Spring Boot context environment and its corresponding configurations. There are various methods for loading the main class for testing, here are a few commonly used ones:

1. By using the @SpringBootTest annotation in a test class, the Spring Boot context environment will be automatically loaded by starting the class.

@SpringBootTest
public class MyTest {
    // 测试代码
}

1. Specify the startup class using the @SpringBootTest annotation: If there are multiple startup classes, you can use the classes attribute to specify which one to load.

@SpringBootTest(classes = MyApplication.class)
public class MyTest {
    // 测试代码
}

1. Using the @ContextConfiguration annotation: load the startup class with the @ContextConfiguration annotation and specify its location.

@RunWith(SpringRunner.class)
@ContextConfiguration(classes = MyApplication.class)
public class MyTest {
    // 测试代码
}

1. The SpringApplicationConfiguration annotation can be used to load the main class in earlier versions of Spring Boot.

@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = MyApplication.class)
public class MyTest {
    // 测试代码
}

All of these methods can be used to load the startup class for testing, simply choose the appropriate method based on the specific circumstances.