Bug 329482 Uninstantiated part may be rendered when closing another part in the same stack
1. Activate the 'Javadoc' view. 2. Activate the 'Package Explorer' view. 3. Shutdown. 4. Restart. 5. Ctrl+3 > Properties 6. Hide the 'Properties' view. 7. Now the 'Problems' view is the selected element. It should be the 'Javadoc' view.
tests/org.eclipse.e4.ui.tests/src/org/eclipse/e4/ui/tests/application/EPartServiceTest.java
initialize(applicationContext, application);
		getEngine().createGui(window);
		EPartService partService = (EPartService) window.getContext().get(
				EPartService.class.getName());
		Collection<MPart> dirtyParts = partService.getDirtyParts();
		assertNotNull(dirtyParts);
		if (before) {
			assertEquals(1, dirtyParts.size());
			assertEquals(saveablePart, dirtyParts.iterator().next());
		} else {
			assertEquals(0, dirtyParts.size());
		}
		saveablePart.setDirty(after);
		dirtyParts = partService.getDirtyParts();
		if (after) {
			assertEquals(1, dirtyParts.size());
			assertEquals(saveablePart, dirtyParts.iterator().next());
		} else {
			assertEquals(0, dirtyParts.size());
		}
	}
	public void testGetDirtyParts3_TrueTrue() {
		testGetDirtyParts3(true, true);
	}
	public void testGetDirtyParts3_TrueFalse() {
		testGetDirtyParts3(true, false);
	}
	public void testGetDirtyParts3_FalseTrue() {
		testGetDirtyParts3(false, true);
	}