Bug 61709 NPE in JUnit view plus strange behavior
I200405060200 + plug-in export for I200405110800 I was running two JUnit plug-in tests from two different workbench window (maybe I switched to early from one window to the other). I then saw very odd behavior: the JUnit view switched showing results from both tests (see attached picture which shows that the jdt.ui.tests are run but a result from the refactoring tests is reported (below title). The cause for this might be the following NPE(?):
org.eclipse.jdt.junit/src/org/eclipse/jdt/internal/junit/ui/TestHierarchyTab.java
if (parent == fCachedParent)
			return;
		fCachedItems= parent.getItems();
		fCachedParent= parent;	
	}
	private void collapsePassedTests(TreeItem treeItem) {
		TreeItem parent= treeItem.getParentItem();
		if (parent != null) {
			TreeItem[] items= null;
			if (parent == fCachedParent)
				items= fCachedItems;
			else 
				items= parent.getItems();
				
			if (isLast(treeItem, items)) {
				boolean ok= true;
				for (int i= 0; i < items.length; i++) {
					if (isFailure(items[i])) {
						ok= false;
						break;
					}
				}
				if (ok) {
					parent.setExpanded(false);
					collapsePassedTests(parent);
				}
			}
		}
	}
	private boolean isLast(TreeItem treeItem, TreeItem[] items) {