// add
assertTrue("Set Test - Adding a duplicate element changed the set",
!set.add(new Integer(50)));
assertTrue("Set Test - Removing an element did not change the set", set
.remove(new Integer(50)));
assertTrue(
"Set Test - Adding and removing a duplicate element failed to remove it",
!set.contains(new Integer(50)));
set.add(new Integer(50));
new Support_CollectionTest("", set).runTest();