java 球衣/Mockito：NullInsteadOfMockException on client.post 调用验证
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jersey/Mockito: NullInsteadOfMockException on client.post call verification
提问by Joanna Derks
I've run into a strange issue with unit testing the following jersey client call:
我在对以下 jersey 客户端调用进行单元测试时遇到了一个奇怪的问题：
WebResource webResource = _client.resource(url);
ClientResponse response = webResource
.accept("application/json")
.type("application/x-www-form-urlencoded")
.post(ClientResponse.class, postBody);
PostBody is a MultivaluedMap.
PostBody 是一个多值映射。
The unit test verifies fine the acceptand typecalls but fails on the postone with this exception:
单元测试验证了accept和type调用，但在post此异常中失败：
org.mockito.exceptions.misusing.NullInsteadOfMockException:
Argument passed to verify() should be a mock but is null!
Here's the test code:
这是测试代码：
_client = Mockito.mock(Client.class);
_webResource = Mockito.mock(WebResource.class);
_builder = Mockito.mock(WebResource.Builder.class);
_response = Mockito.mock(ClientResponse.class);
Mockito.when(_client.resource(Mockito.anyString())).thenReturn(_webResource);
Mockito.when(_response.getEntity(Mockito.any(Class.class))).thenReturn(new RefreshTokenDto());
Mockito.when(_response.getStatus()).thenReturn(200);
Mockito.when(_builder.post(Mockito.eq(ClientResponse.class), Mockito.anyObject())).thenReturn(_response);
Mockito.when(_builder.type(Mockito.anyString())).thenReturn(_builder);
Mockito.when(_webResource.accept(Mockito.anyString())).thenReturn(_builder);
RefreshTokenDto response = _clientWrapper.exchangeAuthorizationCodeForToken(_token);
Assert.assertNotNull(response);
Mockito.verify(_client.resource(_baseUrl + "token"));
Mockito.verify(_webResource.accept("application/json"));
Mockito.verify(_builder.type("application/x-www-form-urlencoded"));
// TODO: this line throws NullRefExc for some unknown reason
Mockito.verify(_builder.post(Mockito.any(Class.class), Mockito.any(MultivaluedMap.class)));
Can you see anything wrong with this code?
你能看出这段代码有什么问题吗？
回答by Dawood ibn Kareem
Yes. You've misused verify. The argument to verifyhas to be the mock itself. Then you call the method you want to verify on the value that's returned by verify. So in this case, the first verifycall should be
是的。你误用了verify. 的论点verify必须是模拟本身。然后调用要验证的方法，该方法由 返回的值verify。所以在这种情况下，第一个verify调用应该是
Mockito.verify(_client).resource(_baseUrl + "token");
and similarly for the other verifycalls.
其他verify电话也类似。
回答by entpnerd
I ran into this issue, but for when()instead of verify(). I found this question by googling. For me, I had forgotten to add MockitoAnnotations.initMocks()in my test class' constructor.
我遇到了这个问题，但when()不是verify(). 我通过谷歌搜索发现了这个问题。对我来说，我忘记添加MockitoAnnotations.initMocks()测试类的构造函数。
