Examples of org.powermock.core.classloader.MockClassLoader

org.powermock.core.classloader.MockClassLoader
Mock all classes except system classes.
Notice that there are two different types of classes that are not mocked:
1. system classes are deferred to another classloader
2. testing framework classes are loaded, but not modified
@author Johan Haleby @author Jan Kronquist

  }


  @Test
  public void loadsObjectGraphThatIncludesPrimitiveArraysInSpecifiedClassloaderAndReturnsResultInOriginalClassloader()
      throws Exception {
    MockClassLoader classloader = createClassloader();
    final int[] expected = new int[] { 1, 2 };
    final MyPrimitiveArrayHolder myClass = new MyPrimitiveArrayHolder(expected);
    int[] actual = new ClassloaderExecutor(classloader).execute(new Callable<int[]>() {
      public int[] call() throws Exception {
        assertEquals(MockClassLoader.class.getName(), this.getClass().getClassLoader().getClass().getName());

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  @Ignore("It seems like this test works on certain JVM's and fails on others. WHY!??!")
  @Test
  public void loadsObjectGraphThatIncludesCollectionInSpecifiedClassloaderAndReturnsResultInOriginalClassloader()
      throws Exception {
    final MockClassLoader classloader = createClassloader();
    final Collection<MyReturnValue> expected = new LinkedList<MyReturnValue>();
    expected.add(new MyReturnValue(new MyArgument("one")));
    expected.add(new MyReturnValue(new MyArgument("two")));
    final MyCollectionHolder myClass = new MyCollectionHolder(expected);
    Collection<?> actual = new ClassloaderExecutor(classloader).execute(new Callable<Collection<?>>() {

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    }
  }


  @Test
  public void usesReferenceCloningWhenTwoFieldsPointToSameInstance() throws Exception {
    final MockClassLoader classloader = createClassloader();
    final MyReferenceFieldHolder tested = new MyReferenceFieldHolder();
    assertSame(tested.getMyArgument1(), tested.getMyArgument2());
    assertSame(tested.getMyArgument1(), MyReferenceFieldHolder.MY_ARGUMENT);
    new ClassloaderExecutor(classloader).execute(new Runnable() {
      public void run() {

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    });
  }


  @Test
  public void worksWithObjectHierarchy() throws Exception {
    final MockClassLoader classloader = createClassloader();
    final MyHierarchicalFieldHolder tested = new MyHierarchicalFieldHolder();
    assertSame(tested.getMyArgument1(), tested.getMyArgument2());
    assertEquals(tested.getMyArgument3(), tested.getMyArgument2());
    new ClassloaderExecutor(classloader).execute(new Runnable() {
      public void run() {

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  }


  @Test
  @Ignore("It seems like this test works on certain JVM's and fails on others. WHY!??!")
  public void worksWithObjectHierarchyAndOverloadedFields() throws Exception {
    final MockClassLoader classloader = createClassloader();
    final MyHierarchicalOverloadedFieldHolder tested = new MyHierarchicalOverloadedFieldHolder();
    assertSame(tested.getMyArgument1(), tested.getMyArgument2());
    assertEquals(tested.getMyArgument1(), tested.getMyArgument3());
    assertSame(tested.getMyArgument3(), MyHierarchicalOverloadedFieldHolder.MY_ARGUMENT);
    assertNotSame(MyReferenceFieldHolder.MY_ARGUMENT, MyHierarchicalOverloadedFieldHolder.MY_ARGUMENT);

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    });
  }


  @Test
  public void worksWithReflection() throws Exception {
    final MockClassLoader classloader = createClassloader();
    final MyArgument myArgument = new MyArgument("test");
    final MyReturnValue instance = new MyReturnValue(myArgument);
    Method method = instance.getClass().getMethod("getMyArgument");
    final ReflectionMethodInvoker tested = new ReflectionMethodInvoker(method, instance);
    new ClassloaderExecutor(classloader).execute(new Runnable() {

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      }
    });
  }


  private MockClassLoader createClassloader() {
    MockClassLoader classloader = new MockClassLoader(new String[] { MyClass.class.getName(),
        MyArgument.class.getName(), MyReturnValue.class.getName() });
    MockTransformer mainMockTransformer = new MockTransformer() {
      public CtClass transform(CtClass clazz) throws Exception {
        return clazz;
      }
    };
    LinkedList<MockTransformer> linkedList = new LinkedList<MockTransformer>();
    linkedList.add(mainMockTransformer);
    classloader.setMockTransformerChain(linkedList);
    return classloader;
  }

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     * This tests that a inner 'public static final class' can be modified to drop the final modifier. Fixes <a
     * href="http://code.google.com/p/powermock/issues/detail?id=95">Issue 95</a>.
     */
    @Test
    public void staticFinalInnerClassesShouldBecomeNonFinal() throws Exception {
        MockClassLoader mockClassLoader = new MockClassLoader(new String[] { MockClassLoader.MODIFY_ALL_CLASSES });
        mockClassLoader.setMockTransformerChain(Collections.<MockTransformer> singletonList(new MainMockTransformer()));
        Class<?> clazz = Class.forName(SupportClasses.StaticFinalInnerClass.class.getName(), true, mockClassLoader);
        assertFalse(Modifier.isFinal(clazz.getModifiers()));
    }

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     * This tests that a inner 'public final class' can be modified to drop the final modifier. Fixes <a
     * href="http://code.google.com/p/powermock/issues/detail?id=95">Issue 95</a>.
     */
    @Test
    public void finalInnerClassesShouldBecomeNonFinal() throws Exception {
        MockClassLoader mockClassLoader = new MockClassLoader(new String[] { MockClassLoader.MODIFY_ALL_CLASSES });
        mockClassLoader.setMockTransformerChain(Collections.<MockTransformer> singletonList(new MainMockTransformer()));
        Class<?> clazz = Class.forName(SupportClasses.FinalInnerClass.class.getName(), true, mockClassLoader);
        assertFalse(Modifier.isFinal(clazz.getModifiers()));
    }

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     * This tests that a inner 'enum' can be modified to drop the final modifier. Fixes <a
     * href="http://code.google.com/p/powermock/issues/detail?id=95">Issue 95</a>.
     */
    @Test
    public void enumClassesShouldBecomeNonFinal() throws Exception {
        MockClassLoader mockClassLoader = new MockClassLoader(new String[] { MockClassLoader.MODIFY_ALL_CLASSES });
        mockClassLoader.setMockTransformerChain(Collections.<MockTransformer> singletonList(new MainMockTransformer()));
        Class<?> clazz = Class.forName(SupportClasses.EnumClass.class.getName(), true, mockClassLoader);
        assertFalse(Modifier.isFinal(clazz.getModifiers()));
    }

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