[英]How to mock Asynchronous (@Async) method in Spring Boot using Mockito?
使用mockito模拟异步( @Async
)方法的最佳方法是什么? 提供以下服务:
@Service
@Transactional(readOnly=true)
public class TaskService {
@Async
@Transactional(readOnly = false)
public void createTask(TaskResource taskResource, UUID linkId) {
// do some heavy task
}
}
Mockito的验证如下:
@RunWith(SpringRunner.class)
@WebMvcTest(SomeController.class)
public class SomeControllerTest {
@Autowired
MockMvc mockMvc;
@MockBean
private TaskService taskService;
@Rule
public MockitoRule mockitoRule = MockitoJUnit.rule();
// other details omitted...
@Test
public void shouldVerify() {
// use mockmvc to fire to some controller which in turn call taskService.createTask
// .... details omitted
verify(taskService, times(1)) // taskService is mocked object
.createTask(any(TaskResource.class), any(UUID.class));
}
}
上面的测试方法shouldVerify
总是抛出:
org.mockito.exceptions.misusing.InvalidUseOfMatchersException:
Misplaced argument matcher detected here:
-> at SomeTest.java:77) // details omitted
-> at SomeTest.java:77) // details omitted
You cannot use argument matchers outside of verification or stubbing.
Examples of correct usage of argument matchers:
when(mock.get(anyInt())).thenReturn(null);
doThrow(new RuntimeException()).when(mock).someVoidMethod(anyObject());
verify(mock).someMethod(contains("foo"))
Also, this error might show up because you use argument matchers with methods that cannot be mocked.
Following methods *cannot* be stubbed/verified: final/private/equals()/hashCode().
Mocking methods declared on non-public parent classes is not supported.
如果我从TaskService.createTask
方法中删除@Async
,则不会发生上述异常。
Spring Boot版本: 1.4.0.RELEASE
Mockito版本:1.10.19
我们希望在1.4.1中修复Spring Boot中的错误 。 问题是你的模拟TaskService
仍然被异步调用,这打破了Mockito。
您可以通过为TaskService
创建一个接口并创建一个模拟来解决此问题。 只要你只在实现上留下@Async
注释就可以了。
像这样的东西:
public interface TaskService {
void createTask(TaskResource taskResource, UUID linkId);
}
@Service
@Transactional(readOnly=true)
public class AsyncTaskService implements TaskService {
@Async
@Transactional(readOnly = false)
@Override
public void createTask(TaskResource taskResource, UUID linkId) {
// do some heavy task
}
}
发现通过将Async模式更改为AspectJ修复了问题:
@EnableCaching
@SpringBootConfiguration
@EnableAutoConfiguration
@ComponentScan(lazyInit = true)
@EnableAsync(mode = AdviceMode.ASPECTJ) // Changes here!!!
public class Main {
public static void main(String[] args) {
new SpringApplicationBuilder().sources(Main.class)
.run(args);
}
}
在我明白这个问题的真正根源之前,我会接受这个暂时的解决方案。
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