Bug 327980 Part activation history should not be perspective-dependent
tests/org.eclipse.e4.ui.tests/src/org/eclipse/e4/ui/tests/application/EPartServiceTest.java
partStackA.getChildren().add(placeholderB1);
		MPerspective perspectiveB = AdvancedFactoryImpl.eINSTANCE
				.createPerspective();
		perspectiveStack.getChildren().add(perspectiveB);
		MPartStack partStackB = BasicFactoryImpl.eINSTANCE.createPartStack();
		perspectiveB.getChildren().add(partStackB);
		perspectiveB.setSelectedElement(partStackB);
		MPlaceholder placeholderC = AdvancedFactoryImpl.eINSTANCE
				.createPlaceholder();
		partC.setCurSharedRef(placeholderC);
		placeholderC.setRef(partC);
		partStackB.getChildren().add(placeholderC);
		partStackB.setSelectedElement(placeholderC);
		MPlaceholder placeholderB2 = AdvancedFactoryImpl.eINSTANCE
				.createPlaceholder();
		placeholderB2.setRef(partB);
		partStackB.getChildren().add(placeholderB2);
		initialize(applicationContext, application);
		getEngine().createGui(window);
		EPartService partService = window.getContext().get(EPartService.class);
		partService.activate(partA);
		partService.switchPerspective(perspectiveB);
		partService.activate(partB);
		partService.switchPerspective(perspectiveA);
		assertEquals(partB, partService.getActivePart());
		partService.activate(partA);
		assertEquals(partA, partService.getActivePart());
		partService.switchPerspective(perspectiveB);
		assertEquals(partB, partService.getActivePart());
		partService.activate(partC);