title: Mock spring MessageContext
body: <p>i would like to mock these methods: </p>
  
  <pre><code>SaajSoapMessage saajSoapMessage = (SaajSoapMessage) messageContext.getRequest();
  SoapBody requestBody = saajSoapMessage.getSoapBody();
  </code></pre>
  
  <p>I tried it with this </p>
  
  <pre><code>messageContextMock = mock(MessageContext.class);
  saajSoapMessageMock = mock(SaajSoapMessage.class);
  
  when(messageContextMock.getRequest()).thenReturn((SaajSoapMessage) saajSoapMessageMock);
  when(saajSoapMessageMock.getSoapBody()).thenReturn(soapBodyMock);
  </code></pre>
  
  <p>But I have problem with mocking <code>getSoapBody()</code> because Junit wrote me:</p>
  
  <pre><code>at org.springframework.ws.soap.AbstractSoapMessage.getSoapBody(AbstractSoapMessage.java:36)
  </code></pre>
  
  <p>How to mock this operation correctly?</p>
  
  <p>EDIT (full stack):</p>
  
  <pre><code>java.lang.NullPointerException
      at org.springframework.ws.soap.AbstractSoapMessage.getSoapBody(AbstractSoapMessage.java:36)
      at com.project.my.WebMessageTest.setUp(WebMessageTest.java:33)
      at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
      at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
      at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
      at java.lang.reflect.Method.invoke(Method.java:606)
      at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:45)
      at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
      at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)
      at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:27)
      at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)
      at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)
      at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)
      at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)
      at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)
      at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)
      at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)
      at org.junit.runners.ParentRunner.run(ParentRunner.java:300)
      at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:50)
      at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
      at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
  </code></pre>