Bug 334559 EPartService's part searching path may not include parts outside of the active perspective
tests/org.eclipse.e4.ui.tests/src/org/eclipse/e4/ui/tests/application/EPartServiceTest.java
assertEquals(
				"Bringing a part to top that's not in the same container as the active part shouldn't change the active part",
				partC, partService.getActivePart());
	}
	public void testGetParts_Empty() {
		MApplication application = createApplication(1, new String[1][0]);
		MWindow window = application.getChildren().get(0);
		getEngine().createGui(window);
		EPartService partService = (EPartService) window.getContext().get(
				EPartService.class.getName());
		Collection<MPart> parts = partService.getParts();
		assertNotNull(parts);
		assertEquals(0, parts.size());
	}
	public void testGetParts_OneWindow() {
		MApplication application = createApplication("partId", "partId2");
		MWindow window = application.getChildren().get(0);
		MPartStack partStack = (MPartStack) window.getChildren().get(0);
		getEngine().createGui(window);
		EPartService partService = (EPartService) window.getContext().get(
				EPartService.class.getName());
		Collection<MPart> parts = partService.getParts();
		assertNotNull(parts);
		assertEquals(2, parts.size());
		assertTrue(parts.containsAll(partStack.getChildren()));
	}
	public void testGetParts_TwoWindows() {
		MApplication application = createApplication(new String[] { "partId",
				"partId2" }, new String[] { "partIA", "partIdB", "partIdC" });
		MWindow windowA = application.getChildren().get(0);