Java 如何断言Rest客户端异常?
我试图断言rest客户端异常。我的代码如下:Java 如何断言Rest客户端异常?,java,spring-boot,junit,mockito,resttemplate,Java,Spring Boot,Junit,Mockito,Resttemplate,我试图断言rest客户端异常。我的代码如下: public class SomeClass { public SomeResponse postMessage() { SomeBean requestObject = new SomeBean(); SomeResponse response = null; try{ response = restTemaple.postForEntity("http://som
public class SomeClass {
public SomeResponse postMessage() {
SomeBean requestObject = new SomeBean();
SomeResponse response = null;
try{
response = restTemaple.postForEntity("http://someUrl", requestObject, SomeResponse.class);
} catch(RestTemplateException e) {
Sysout("Rest Template Exception!");
}
return response;
}
}
@RunWith(MockitoJUnitRunner.class)
@ActiveProfiles("test")
@PropertySource("classpath:application-test.properties")
public class testClass {
@InjectMocks
SomeClass service;
@Mock
RestTempalte restTemplate;
@Test (expected = RestTemplateException.class)
public void myTest() {
Mockito.when(
restTemplate.postForEntity(Mockito.anyString(), Mockito.any(SomeBean.class), Mockito.any()))
.thenThrow(new RestClientException(null));
service.postMessage();
}
}
我的测试用例如下:
public class SomeClass {
public SomeResponse postMessage() {
SomeBean requestObject = new SomeBean();
SomeResponse response = null;
try{
response = restTemaple.postForEntity("http://someUrl", requestObject, SomeResponse.class);
} catch(RestTemplateException e) {
Sysout("Rest Template Exception!");
}
return response;
}
}
@RunWith(MockitoJUnitRunner.class)
@ActiveProfiles("test")
@PropertySource("classpath:application-test.properties")
public class testClass {
@InjectMocks
SomeClass service;
@Mock
RestTempalte restTemplate;
@Test (expected = RestTemplateException.class)
public void myTest() {
Mockito.when(
restTemplate.postForEntity(Mockito.anyString(), Mockito.any(SomeBean.class), Mockito.any()))
.thenThrow(new RestClientException(null));
service.postMessage();
}
}
我得到一个Junit断言错误。请在下面找到stackTrace:
java.lang.AssertionError: Expected exception: org.springframework.web.client.RestClientException
at org.junit.internal.runners.statements.ExpectException.evaluate(ExpectException.java:32)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.mockito.internal.runners.DefaultInternalRunner$1.run(DefaultInternalRunner.java:79)
at org.mockito.internal.runners.DefaultInternalRunner.run(DefaultInternalRunner.java:85)
at org.mockito.internal.runners.StrictRunner.run(StrictRunner.java:39)
at org.mockito.junit.MockitoJUnitRunner.run(MockitoJUnitRunner.java:163)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
请告诉我这件事。我如何在这里抛出并断言rest客户端异常?您正在将异常捕获到
postMessage
中,而无需重新抛出异常。如果将异常处理到postMessage
,则不必测试方法执行是否会抛出RestClientException,因为它是在那里处理的。如果您等待方法抛出此异常,请不要捕获它,只需在方法声明中使用throws-RestClientException即可
public class SomeClass {
public void postMessage() throws RestClientException {
SomeBean requestObject = new SomeBean();
return restTemaple.postForEntity("http://someUrl", requestObject, SomeResponse.class);
}
}
然后在单元测试中不调用postMessage
。您只是向您的mock发出指令,说明在调用restempalte.postForEntity
时如何做出反应
@Test (expected = RestClientException.class)
public void myTest() {
Mockito.when(
restTemplate.postForEntity(Mockito.anyString(), Mockito.any(SomeBean.class), Mockito.any()))
.thenThrow(new RestClientException(null));
service.postMessage(); // something like that needed here
}
在postMessage
中返回某些内容也很奇怪,因为该方法的返回类型是void
public SomeResponse postMessage() throws RestClientException {
SomeBean requestObject = new SomeBean();
return restTemaple.postForEntity("http://someUrl", requestObject, SomeResponse.class);
}
看起来好多了谢谢你的回复。我已经编辑了上面的代码。在上述情况下,我无法避免catch块,因为在catch块中,我们正在处理一些服务器端日志逻辑。上面的代码仍然得到相同的堆栈跟踪。因此,您需要检查您的测试逻辑。如果捕获此异常而不重新引用它,则此断言将永远不匹配。如果在此catch块中执行某些操作来处理异常,则可以测试此行为。当这个方法通过catch块时,它返回什么样的响应?在您的示例中,它将返回null。因此,您可以像这样进行测试,然后执行-->assertNull(service.postMessage())如果您确实希望抛出此异常以保持日志逻辑,请添加指令
throw e
在catch块的末尾,不要忘记将抛出RestClientException
添加到postMessage
方法声明中,正如我上面所说的,非常感谢您的上述帮助。我理解以上几点。我这里还有另一个场景,比如:尝试{…}catch(异常e){Throw new MyException();}如果我尝试:Mockito.when(restemplate.postForEntity(Mockito.anyString(),Mockito.any(SomeBean.class),Mockito.any())。然后抛出(new MyException(null));这有点像我预料的那样给我带来了一个错误。有什么想法吗?因为您不能为restemplate.postForEntity
抛出自定义异常。我已经编辑了我的答案,因为我看到这个方法可以抛出RestClientException
而不是restemplateexception
。如果您的方法postMessage
在restemaple.postForEntity
引发RestClientException
时引发MyException
,您必须像那样指定它。然后抛出(新的RestClientException(“消息”)
和@Test(预期=MyException.class)