在JUnit Jupiter中使用自定义组合注释时，为@Autowired bean获取NPE

Question

TransactionalIntegrationTest.java

@TestMethodOrder(OrderAnnotation.class)
@SpringJUnitWebConfig(locations = { "classpath:service.xml","classpath:data.xml" })
@Tag("1")
public @interface TransactionalIntegrationTest {}

MyTestTest .java

@TransactionalIntegrationTest
public class MyTestTest {
@Autowired
protected CreateUser createUser;

@BeforeEach
public void setUp() throws Exception {
createUser.createTimesheetUser(...)} --> NPE
}

在createUser上获取NullPointerException。

如果我不使用元注释，那么它将正常工作。

MyTestTest.java

@TestMethodOrder(OrderAnnotation.class)
@SpringJUnitWebConfig(locations = { "classpath:service.xml","classpath:data.xml" })
@Tag("1")
public class MyTestTest {
@Autowired
protected CreateUser createUser;

@BeforeEach
public void setUp() throws Exception {
createUser.createTimesheetUser(...)} --> works now
}

Answer 1

您可能会缺少@Retention声明，该声明允许诸如Spring和JUnit之类的框架在运行时查看批注。

如下声明您组成的注释应该起作用。

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
@TestMethodOrder(OrderAnnotation.class)
@SpringJUnitWebConfig(locations = { "classpath:service.xml", "classpath:data.xml" })
@Tag("1")
public @interface TransactionalIntegrationTest {
}