Bug 266769 [CommonNavigator] Reorg test identifiers
tests/org.eclipse.ui.tests.navigator/src/org/eclipse/ui/tests/navigator/DnDTest.java
IWorkbenchPage activePage = PlatformUI.getWorkbench()
				.getActiveWorkbenchWindow().getActivePage();
		TextEditor editorPart = (TextEditor) IDE.openEditor(activePage, file);
		Control end = (Control) editorPart.getAdapter(Control.class);
		
		TreeItem[] items = _viewer.getTree().getItems();
		
		TreeItem start = items[_p1Ind].getItem(0).getItem(0);
		if (!SWTEventHelper.performDnD(start, end)) {
			System.out.println("Drag and drop failed - test invalid");
			return;
		}
		assertNotNull(TestDragAssistant._finishedEvent);
		assertNotNull(TestDragAssistant._finishedSelection);
	}
	
	
	public void testSetDragOperation() throws Exception {
		_contentService.bindExtensions(new String[] { TEST_DROP_COPY_CONTENT },
				false);
		_contentService.getActivationService().activateExtensions(
				new String[] { TEST_DROP_COPY_CONTENT }, false);
		_viewer.expandToLevel(_p1, 3);
		
		_viewer.setSelection(new StructuredSelection(_p1.getFolder("f1")
				.getFile("file1.txt")));
		DisplayHelper.sleep(100);
		TreeItem[] items = _viewer.getTree().getItems();