如何使用 spring-test-junit5 进行嵌套测试？

我一直在玩JUnit 5 http://junit.org/junit5/ and 弹簧测试junit5 https://github.com/sbrannen/spring-test-junit5。然后我尝试使用嵌套测试 http://junit.org/junit5/docs/current/user-guide/#writing-tests-nested功能，但我的测试失败了。当我使用 gradle 直接从命令行运行时也会发生这种情况。

@ExtendWith(SpringExtension.class)
@ContextConfiguration(classes = TestConfig.class)
@DisplayName("In cat club")
public class NestedCatTests {
    @Autowired
    Cat cat;

    @Autowired
    List<Cat> cats;

    @Test
    @DisplayName("Catbert is the cat")
    void catWasAutowired() {
        assertEquals(
                "Catbert",
                cat.getName()
        );
    }

    @Nested
    @DisplayName("Catbert")
    class IsMemberOfClub {
        @Test
        @DisplayName("is a member")
        void isMemberOf() {
            assertTrue(cats.contains(cat));
        }
    }
}

我得到以下异常：

java.lang.IllegalStateException: Failed to load ApplicationContext

at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:124)
at org.springframework.test.context.support.DefaultTestContext.getApplicationContext(DefaultTestContext.java:83)
at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:117)
at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:83)
at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:230)
at org.springframework.test.context.junit.jupiter.SpringExtension.postProcessTestInstance(SpringExtension.java:91)
at org.junit.jupiter.engine.descriptor.ClassTestDescriptor.lambda$null$1(ClassTestDescriptor.java:196)
at org.junit.jupiter.engine.descriptor.JupiterTestDescriptor.executeAndMaskThrowable(JupiterTestDescriptor.java:102)
...
at java.lang.reflect.Method.invoke(Method.java:497)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)

Caused by: java.lang.IllegalStateException: Neither GenericXmlContextLoader nor AnnotationConfigContextLoader was able to load an ApplicationContext from [MergedContextConfiguration@4816278d testClass = NestedCatTests.IsMemberOfClub, locations = '{}', classes = '{}', contextInitializerClasses = '[]', activeProfiles = '{}', propertySourceLocations = '{}', propertySourceProperties = '{}', contextCustomizers = set[[empty]], contextLoader = 'org.springframework.test.context.support.DelegatingSmartContextLoader', parent = [null]].
at org.springframework.test.context.support.AbstractDelegatingSmartContextLoader.loadContext(AbstractDelegatingSmartContextLoader.java:263)
at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContextInternal(DefaultCacheAwareContextLoaderDelegate.java:98)
at org.springframework.test.context.cache.DefaultCacheAwareContextLoaderDelegate.loadContext(DefaultCacheAwareContextLoaderDelegate.java:116)
... 44 more

我有一个工作@嵌套测试示例 https://github.com/hantsy/spring-reactive-jwt-sample/blob/master/src/test/java/com/example/demo/IntegrationTests.java使用Spring Boot。

@SpringBootTest(webEnvironment = RANDOM_PORT)
@Slf4j
@DisplayName("API endpoints integration tests")
class IntegrationTests {

    @LocalServerPort
    private int port;

    private WebTestClient client;

    @Autowired
    private JwtTokenProvider jwtTokenProvider;

    @BeforeEach
    private void setup() {
        this.client = WebTestClient.bindToServer()
                .baseUrl("http://localhost:" + port)
                .build();
    }

    @Nested
    @DisplayName("if user is not logged in")
    class NotLoggedIn { ... }

    @Nested
    @DisplayName("if user logged as user")
    class LoggedAsUser{ ... }

//...

}