Bug 328339 Part activation history seems to ignore detached windows
1. Detach a view. 2. Drag another view into said detached window. 3. Activate the two views alternatively. 4. Close one of them. 5. A part in the workbench window is activated instead of the other view in the detached window.
tests/org.eclipse.e4.ui.tests/src/org/eclipse/e4/ui/tests/application/EPartServiceTest.java
.getActiveChild());
	}
	public void testSwitchPerspective03() {
		MApplication application = ApplicationFactoryImpl.eINSTANCE
				.createApplication();
		MWindow windowA = BasicFactoryImpl.eINSTANCE.createWindow();
		application.getChildren().add(windowA);
		application.setSelectedElement(windowA);
		MWindow windowB = BasicFactoryImpl.eINSTANCE.createWindow();
		application.getChildren().add(windowB);
		MPerspectiveStack perspectiveStackB = AdvancedFactoryImpl.eINSTANCE
				.createPerspectiveStack();
		windowB.getChildren().add(perspectiveStackB);
		windowB.setSelectedElement(perspectiveStackB);
		MPerspective perspectiveB1 = AdvancedFactoryImpl.eINSTANCE
				.createPerspective();
		perspectiveStackB.getChildren().add(perspectiveB1);
		perspectiveStackB.setSelectedElement(perspectiveB1);
		MPart partB1 = BasicFactoryImpl.eINSTANCE.createPart();
		perspectiveB1.getChildren().add(partB1);
		perspectiveB1.setSelectedElement(partB1);
		MPerspective perspectiveB2 = AdvancedFactoryImpl.eINSTANCE
				.createPerspective();
		perspectiveStackB.getChildren().add(perspectiveB2);
		MPart partB2 = BasicFactoryImpl.eINSTANCE.createPart();
		perspectiveB2.getChildren().add(partB2);
		perspectiveB2.setSelectedElement(partB2);
		initialize(applicationContext, application);
		getEngine().createGui(windowA);
		getEngine().createGui(windowB);