title: org.mockito.exceptions.misusing.NotAMockException
body: <p>I have tried below lines</p>
  
  <pre><code>@Test
  public void getXYZ_Success() throws Exception  {
      Response result=abc.XYZ(exampleHeader);
      Response response=new Response(); 
      response.setMessage(null);
      response.setStatusCode("01");
      response.setStatus("Failure");
  
      List&lt;ExampleFilterLkp&gt; exampleFilterList=new ArrayList&lt;exampleFilterLkp&gt;();
      exampleFilterLkp exampleFilterLkp=new exampleFilterLkp();
      examplFilterLkp.setexampleKey("1");
      exampleList.add(exampleFilterLkp);      
      doReturn(response).when(result);
  }
  </code></pre>
  
  <p>I'm getting below error, how to solve this issue, please help me</p>
  
  <blockquote>
    <p>org.mockito.exceptions.misusing.NotAMockException: 
    Argument passed to when() is not a mock!
    Example of correct stubbing:
        doThrow(new RuntimeException()).when(mock).someMethod();
        at com.firstdata.mpl.manager.exampleTest.getexampleFilter_NullFailure(FuelManagerTest.java:184)
        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:497)
        at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47)
        at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
        at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44)
        at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
        at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
        at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70)
        at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
        at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238)
        at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63)
        at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236)
        at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53)
        at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229)
        at org.junit.runners.ParentRunner.run(ParentRunner.java:309)
        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:670)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
        at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)</p>
  </blockquote>