如何使用Mockito在Spring Boot中模拟异步(@Async)方法？
如何使用Mockito在Spring Boot中模拟异步(@Async)方法？
提问于 2016-08-18 18:42:06
用mockito模拟异步(@Async)方法的最好方法是什么？提供的服务如下：
@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总是会抛出：
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，上面的异常就不会发生。
Spring Boot版本：1.4.0.RELEASE
Mockito版本: 1.10.19
Stack Overflow用户
发布于 2016-08-19 18:33:17
我们希望在1.4.1中修复一个bug in Spring Boot。问题是您的模拟TaskService仍然被异步调用，这破坏了Mockito。
您可以通过为TaskService创建一个接口并创建一个模拟接口来解决这个问题。只要您只在实现上保留@Async注释，事情就会正常进行。
如下所示：
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
}
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/39016119
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