LOG.info("testGetChildGroups");
  public void testGetChildGroups() {    GrouperSession  s     = SessionHelper.getRootSession();    Stem            root  = StemHelper.findRootStem(s);    Stem            edu   = StemHelper.addChildStem(root, "edu", "education");    Stem            uofc  = StemHelper.addChildStem(edu, "uofc", "uchicago");    Group           bsd   = StemHelper.addChildGroup(uofc, "bsd", "bsd");    Group           gsb   = StemHelper.addChildGroup(uofc, "gsb", "gsb");    Group           hum   = StemHelper.addChildGroup(uofc, "hum", "hum");    Group           law   = StemHelper.addChildGroup(uofc, "law", "law");    Group           psd   = StemHelper.addChildGroup(uofc, "psd", "psd");    Group           ssd   = StemHelper.addChildGroup(uofc, "ssd", "ssd");    Set children = uofc.getChildGroups();    Assert.assertTrue("6 child groups", children.size() == 6);    Iterator iter = children.iterator();    while (iter.hasNext()) {      Group child = (Group) iter.next();      Stem parent = child.getParentStem();      Assert.assertNotNull("child group has parent", parent);      Assert.assertTrue("parent == uofc", parent.equals(uofc));      Assert.assertTrue(        "root has STEM on parent", parent.hasStem(s.getSubject())      );    }  } // public void testGetChildGroups()