Bug 329184 Detached view that is an activation target candidate can prevent perspective switching
1. Detach the 'Outline' view. 2. Window > Open Perspective > Debug 3. Window > Open Perspective > Java 4. The perspective switch doesn't actually happen. You see the 'Debug' perspective's content with an 'Outline' view detached. Closing the 'Outline' view in the 'Debug' perspective will workaround this problem.
tests/org.eclipse.e4.ui.tests/src/org/eclipse/e4/ui/tests/application/EPartServiceTest.java
}
	public void testSavePart_CancelFalseFalseTrue() {
		testSavePart(ISaveHandler.Save.CANCEL, false, false, true);
	}
	public void testSavePart_CancelFalseFalseFalse() {
		testSavePart(ISaveHandler.Save.CANCEL, false, false, false);
	}
	private void testSavePart_NoHandler(boolean beforeDirty,
			boolean throwException, boolean confirm) {
		MApplication application = ApplicationFactoryImpl.eINSTANCE
				.createApplication();
		MWindow window = BasicFactoryImpl.eINSTANCE.createWindow();
		application.getChildren().add(window);
		MPart saveablePart = BasicFactoryImpl.eINSTANCE.createPart();
		saveablePart.setDirty(beforeDirty);
		saveablePart
				.setContributionURI("platform:/plugin/org.eclipse.e4.ui.tests/org.eclipse.e4.ui.tests.application.ClientEditor");
		window.getChildren().add(saveablePart);
		initialize(applicationContext, application);
		getEngine().createGui(window);
		ClientEditor editor = (ClientEditor) saveablePart.getObject();
		editor.setThrowException(throwException);
		
		applicationContext.set(ISaveHandler.class.getName(), null);
		EPartService partService = (EPartService) window.getContext().get(
				EPartService.class.getName());
		if (beforeDirty) {
			assertEquals(!throwException,
					partService.savePart(saveablePart, confirm));
		} else {