title: PowerMock Mockito [PowerMockito] @PrepareForTest -> java.lang.NoClassDefFoundError: javassist/NotFoundException
body: <p>I'm trying to use my 1st PowerMockito [PowerMock + Mockito] mock in an existing JUnit test.</p>
  
  <p>I've narrowed down that when I simply have the presence of the class-level annotation <code>@PrepareForTest</code> (along with <code>@RunWith(PowerMockRunner.class)</code>, but not any actual mocking code), I get <code>java.lang.NoClassDefFoundError: javassist/NotFoundException</code>:  If I comment out the <code>@PrepareForTest</code>, and also any actual mocking code to eliminate confounding variables, that error does not happen; if I UN-comment just the <code>@PrepareForTest</code>, then the error happens.  So I believe that narrows the problem down to just to do with trying to use the annotation...</p>
  
  <p>I have these jars on my buildpath: junit-4.11.jaar, junit-addons-1.4.jar, mockito-all-1.9.5.jar, mockito-all-1.9.5-sources.jar, powermock-mockito-1.5.4-full.jar.</p>
  
  <p>The powermock-mockito-1.5.4-full.jar is the only new one I added to try out PowerMockito (from <a href="https://code.google.com/p/powermock/wiki/Downloads?tm=2">https://code.google.com/p/powermock/wiki/Downloads?tm=2</a>):  It gives me everything additional I need to write the new PowerMockito mocking code without Eclipse compile errors.  (I already had the other mentioned ars from previous existing JUnit &amp; Mockito [alone, no PowerMockito] tests),</p>
  
  <p><strong>What could I be doing wrong to get that error?</strong></p>