Run the test with a debugger stopping on NPEs

e.g.
org.rhq.enterprise.server.resource.group.test.RecursiveResourceGroupTest.testImplicitGroupMembershipFromInventoryUpdate():
            Resource nodeOne = ResourceTreeHelper.findNode(fullTree, "1");
            resourceGroupManager
                .addResourcesToGroup(subject, recursiveGroup.getId(), new Integer[] { nodeOne.getId() });

If nodeOne is null, nodeOne.getId() yields a NPE which got silently swallowed later, so the Test never fails.


ResourceTreeHelper:

   public static List<Resource> getSubtree(Resource resource) {
        List<Resource> subtree = new ArrayList<Resource>();

        List<Resource> toBeSearched = new LinkedList<Resource>();
        toBeSearched.add(resource);
        while (toBeSearched.size() > 0) {
            Resource next = toBeSearched.get(0);
            subtree.add(next);
            toBeSearched.addAll(next.getChildResources());
        }

next is null in the testsuite called from org.rhq.enterprise.server.resource.group.test.RecursiveResourceGroupTest.testImplicitGroupMembershipFromComplexGroupUpdates()