Mockito is not mocking the method

Question

I am trying to write a test case for a method, but that method is not getting mocked I guess.

Here is the method whose response is returning null:

      response = httpClient.makeRequest(HttpMethod.POST, params.getUrl(), request, headers, null, param1.getRequest().getId(),
          param1, false);

The actual method:

  public HttpResponse makeRequest(String method, String url, String param, Header[] headers, String serviceName, String requestId,
      className param1, Boolean useProxy) throws SystemException {
....
....
....
return httpResponse;
}

This is the mocking code of the respected method:

Mockito.when(httpClient.makeRequest(Mockito.anyString(), Mockito.anyString(), Mockito.anyString(), Mockito.any(), Mockito.anyString(), Mockito.anyString(), Mockito.any(), Mockito.anyBoolean())).thenReturn(response);

The exception that I am getting:

com.morfeus.workflow.exception.WorkflowException: java.lang.NullPointerException

    at com.morfeus.workflow.processor.WebhookProcessor.process(WebhookProcessor.java:164)
    at com.morfeus.workflow.processor.script.WebhookScriptProcessorTest.process(WebhookScriptProcessorTest.java:157)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.springframework.test.context.junit4.statements.RunBeforeTestExecutionCallbacks.evaluate(RunBeforeTestExecutionCallbacks.java:74)
    at org.springframework.test.context.junit4.statements.RunAfterTestExecutionCallbacks.evaluate(RunAfterTestExecutionCallbacks.java:84)
    at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
    at org.springframework.test.context.junit4.statements.RunBeforeTestMethodCallbacks.evaluate(RunBeforeTestMethodCallbacks.java:75)
    at org.springframework.test.context.junit4.statements.RunAfterTestMethodCallbacks.evaluate(RunAfterTestMethodCallbacks.java:86)
    at org.springframework.test.context.junit4.statements.SpringRepeat.evaluate(SpringRepeat.java:84)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:251)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:97)
    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$2.evaluate(ParentRunner.java:268)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:190)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:47)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
Caused by: java.lang.NullPointerException
    at com.morfeus.workflow.processor.WebhookProcessor.process(WebhookProcessor.java:151)
    ... 32 more

Answer 1

You are passing null but expecting anyString() .

From docs ,

Since Mockito 2.1.0, only allow non-null String. As this is a nullable reference, the suggested API to match null wrapper would be isNull(). We felt this change would make tests harness much safer that it was with Mockito 1.x.

Use isNull instead.

Modify it to,

Mockito.when(httpClient.makeRequest(Mockito.anyString(), Mockito.anyString(), Mockito.anyString(), Mockito.any(), Mockito.isNull(), Mockito.anyString(), Mockito.any(), Mockito.anyBoolean())).thenReturn(response);

or don't pass null .