title: PowerMockMockito test runs under Junit but not under TestNG
body: <p>Am trying to run <a href="http://code.google.com/p/powermock/source/browse/trunk/modules/module-test/mockito/junit4/src/test/java/samples/powermockito/junit4/system/SystemClassUserTest.java" rel="nofollow">this baseline unit test</a> from Powermock.   Running the code As-Is off of that link, with both Mockito and Junit and it runs without error.  Unfortunately, I need Mockito and TestNG and that gives me errors on 6 out of the 10 tests:</p>
  
  <pre><code>Mockito cannot mock this class: class replica.java.util.UUID$$PowerMock5
  Mockito can only mock visible &amp; non-final classes.
  </code></pre>
  
  <p>Sorry this is a long code post, but I wanted to be complete.  The first test passes, the second, 5th, 6th, 7th, 9th and 10th all fail.   Can this be made to work under TestNG?</p>
  
  <p><strong>EDIT - add version numbers</strong></p>
  
  <h2>These results occur with Mockito V1.9.0, Powermock V1.4.12, and TestNG v6.8 (all running under Java 1.7)</h2>
  
  <p>Here is the code with my minor modifications:</p>
  
  <pre class="lang-java prettyprint-override"><code>/*
   * Copyright 2008 the original author or authors.
   * 
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   * 
   * http://www.apache.org/licenses/LICENSE-2.0
   * 
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  
  import static org.mockito.BDDMockito.given;
  import static org.mockito.Matchers.anyLong;
  import static org.mockito.Mockito.times;
  import static org.powermock.api.mockito.PowerMockito.doNothing;
  import static org.powermock.api.mockito.PowerMockito.mock;
  import static org.powermock.api.mockito.PowerMockito.mockStatic;
  import static org.powermock.api.mockito.PowerMockito.spy;
  import static org.powermock.api.mockito.PowerMockito.verifyStatic;
  import static org.powermock.api.mockito.PowerMockito.when;
  
  import java.net.URL;
  import java.net.URLConnection;
  import java.net.URLEncoder;
  import java.util.Collections;
  import java.util.LinkedList;
  import java.util.List;
  import java.util.UUID;
  
  import org.powermock.core.classloader.annotations.PrepareForTest;
  import org.powermock.modules.testng.PowerMockObjectFactory;
  import org.testng.Assert;
  import org.testng.IObjectFactory;
  import org.testng.annotations.ObjectFactory;
  import org.testng.annotations.Test;
  
  /**
   * Demonstrates PowerMockito's ability to mock non-final and final system
   * classes. To mock a system class you need to prepare the calling class for
   * testing. I.e. let's say you're testing class A which interacts with
   * URLEncoder then you would do:
   * 
   * &lt;pre&gt;
   * 
   * &amp;#064;PrepareForTest({A.class})
   * 
   * &lt;/pre&gt;
   */
  // @RunWith(PowerMockRunner.class)
  @PrepareForTest({ SystemClassUser.class })
  public class SystemClassUserTest {
  
      @ObjectFactory
      public IObjectFactory getObjectFactory() {
          return new PowerMockObjectFactory();
      }
  
      @Test
      public void assertThatMockingOfNonFinalSystemClassesWorks() throws Exception {
          mockStatic(URLEncoder.class);
  
          when(URLEncoder.encode("string", "enc")).thenReturn("something");
  
          Assert.assertEquals("something", new SystemClassUser().performEncode());
  
      }
  
      @Test
      public void assertThatMockingOfTheRuntimeSystemClassWorks() throws Exception {
          mockStatic(Runtime.class);
  
          Runtime runtimeMock = mock(Runtime.class);
          Process processMock = mock(Process.class);
  
          when(Runtime.getRuntime()).thenReturn(runtimeMock);
          when(runtimeMock.exec("command")).thenReturn(processMock);
  
          Assert.assertSame(processMock, new SystemClassUser().executeCommand());
      }
  
      @Test
      public void assertThatMockingOfFinalSystemClassesWorks() throws Exception {
          mockStatic(System.class);
  
          when(System.getProperty("property")).thenReturn("my property");
  
          Assert.assertEquals("my property", new SystemClassUser().getSystemProperty());
      }
  
      @Test
      public void assertThatPartialMockingOfFinalSystemClassesWorks() throws Exception {
          spy(System.class);
  
          when(System.nanoTime()).thenReturn(2L);
  
          new SystemClassUser().doMoreComplicatedStuff();
  
          Assert.assertEquals("2", System.getProperty("nanoTime"));
      }
  
      @Test
      public void assertThatMockingOfCollectionsWork() throws Exception {
          List&lt;?&gt; list = new LinkedList&lt;Object&gt;();
          mockStatic(Collections.class);
  
          Collections.shuffle(list);
  
          new SystemClassUser().shuffleCollection(list);
  
          verifyStatic(times(2));
          Collections.shuffle(list);
      }
  
      @Test
      public void assertThatPartialMockingOfFinalSystemClassesWorksForNonVoidMethods() throws Exception {
          spy(System.class);
  
          when(System.getProperty("property")).thenReturn("my property");
  
          final SystemClassUser systemClassUser = new SystemClassUser();
          systemClassUser.copyProperty("to", "property");
      }
  
      @Test
      public void assertThatMockingStringWorks() throws Exception {
          mockStatic(String.class);
          final String string = "string";
          final String args = "args";
          final String returnValue = "returnValue";
  
          when(String.format(string, args)).thenReturn(returnValue);
  
          final SystemClassUser systemClassUser = new SystemClassUser();
          Assert.assertEquals(systemClassUser.format(string, args), returnValue);
      }
  
      @Test
      public void mockingStaticVoidMethodWorks() throws Exception {
          mockStatic(Thread.class);
          doNothing().when(Thread.class);
          Thread.sleep(anyLong());
  
          long startTime = System.currentTimeMillis();
          final SystemClassUser systemClassUser = new SystemClassUser();
          systemClassUser.threadSleep();
          long endTime = System.currentTimeMillis();
          Assert.assertTrue(endTime - startTime &lt; 5000);
      }
  
      @Test
      public void mockingURLWorks() throws Exception {
          URL url = mock(URL.class);
          URLConnection urlConnectionMock = mock(URLConnection.class);
  
          when(url.openConnection()).thenReturn(urlConnectionMock);
  
          URLConnection openConnection = url.openConnection();
  
          Assert.assertSame(openConnection, urlConnectionMock);
      }
  
      @Test
      public void mockingUUIDWorks() throws Exception {
          // given
          final UUID mock = mock(UUID.class);
          mockStatic(UUID.class);
          given(UUID.randomUUID()).willReturn(mock);
  
          // when
          String actual = new SystemClassUser().generatePerishableToken();
  
          // then
          Assert.assertEquals("00000000000000000000000000000000", actual);
      }
  }
  </code></pre>
  
  <hr>
  
  <p>If it helps out, here is a stripped down version that executes one of the failing tests:
  [I wasn't sure if I should have edited the question, I'm sorry if that is what I should have done, but where it was already too long, this approach seemed to make a bit more sense.]</p>
  
  <pre class="lang-java prettyprint-override"><code>import static org.powermock.api.mockito.PowerMockito.mockStatic;
  import static org.powermock.api.mockito.PowerMockito.when;
  
  import org.powermock.core.classloader.annotations.PrepareForTest;
  import org.powermock.modules.testng.PowerMockObjectFactory;
  import org.testng.Assert;
  import org.testng.IObjectFactory;
  import org.testng.annotations.ObjectFactory;
  import org.testng.annotations.Test;
  
  @PrepareForTest({ SystemClassUser.class })
  public class SystemClassUserTest {
  
  @ObjectFactory
  public IObjectFactory getObjectFactory() {
      return new PowerMockObjectFactory();
  }
  
  @Test
  public void assertThatMockingOfFinalSystemClassesWorks() throws Exception {
      mockStatic(System.class);
  
      when(System.getProperty("property")).thenReturn("my property");
  
      Assert.assertEquals("my property", new SystemClassUser().getSystemProperty());
  }
  }
  </code></pre>
  
  <hr>
  
  <p>Now here is the SystemClassUser class similarly stripped down:</p>
  
  <pre class="lang-java prettyprint-override"><code>import java.io.IOException;
  
  public class SystemClassUser {
  
      public String getSystemProperty() throws IOException {
          return System.getProperty("property");
      }
  
  }
  </code></pre>
  
  <p>Running results in this Exception:</p>
  
  <p>FAILED: assertThatMockingOfFinalSystemClassesWorks
  org.mockito.exceptions.base.MockitoException: 
  Mockito cannot mock this class: class replica.java.lang.System$$PowerMock0
  Mockito can only mock visible &amp; non-final classes.</p>