Bug 327026 [Compatibility] NPE thrown when reopening an editor after moving a view into the shared area
1. Open an editor. 2. Move the 'Problems' view into the shared area. 3. Close the 'Problems' view. 4. Close the editor. 5. Reopen the same file from step 1. 6. An NPE is thrown. java.lang.NullPointerException at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.getParentWithContext(PartServiceImpl.java:224) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.internalFixContext(PartServiceImpl.java:272) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.bringToTop(PartServiceImpl.java:248) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:742) at org.eclipse.e4.ui.internal.workbench.PartServiceImpl.showPart(PartServiceImpl.java:795) at org.eclipse.ui.internal.WorkbenchPage.busyOpenEditor(WorkbenchPage.java:2206) at org.eclipse.ui.internal.WorkbenchPage.access$14(WorkbenchPage.java:2173) at org.eclipse.ui.internal.WorkbenchPage$6.run(WorkbenchPage.java:2155) at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2151) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2135) at org.eclipse.ui.internal.WorkbenchPage.openEditor(WorkbenchPage.java:2126) at org.eclipse.ui.ide.IDE.openEditor(IDE.java:651) at org.eclipse.ui.ide.IDE.openEditor(IDE.java:610) at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:354) at org.eclipse.jdt.internal.ui.javaeditor.EditorUtility.openInEditor(EditorUtility.java:164) at org.eclipse.jdt.ui.actions.OpenAction.run(OpenAction.java:219)
tests/org.eclipse.e4.ui.tests/src/org/eclipse/e4/ui/tests/application/EPartServiceTest.java
MWindow window = application.getChildren().get(0);
		MPartStack partStack = (MPartStack) window.getChildren().get(0);
		MPart part = (MPart) partStack.getChildren().get(0);
		partStack.setSelectedElement(part);
		getEngine().createGui(window);
		EPartService partService = (EPartService) window.getContext().get(
				EPartService.class.getName());
		assertTrue(partService.isPartVisible(part));
	}
	public void testIsPartVisible_ViewVisible_myService() {
		MApplication application = createApplication("partId");
		MWindow window = application.getChildren().get(0);
		MPartStack partStack = (MPartStack) window.getChildren().get(0);
		MPart part = (MPart) partStack.getChildren().get(0);
		partStack.setSelectedElement(part);
		getEngine().createGui(window);
		EPartService partService = (EPartService) part.getContext().get(
				EPartService.class.getName());
		assertTrue(partService.isPartVisible(part));
	}
	public void testIsPartVisible_ViewNotVisible() {
		MApplication application = createApplication("partId", "partId2");
		MWindow window = application.getChildren().get(0);
		MPartStack partStack = (MPartStack) window.getChildren().get(0);
		partStack.setSelectedElement(partStack.getChildren().get(0));
		getEngine().createGui(window);
		MPart part = (MPart) partStack.getChildren().get(1);
		EPartService partService = (EPartService) window.getContext().get(
				EPartService.class.getName());
		assertFalse(partService.isPartVisible(part));