public void testFidFilter() { FidFilterImpl ff = new FidFilterImpl(); ff.addFid("1"); FidFilterImpl ff2 = new FidFilterImpl("1"); assertNotNull(ff2); assertEquals(ff, ff2); assertTrue(!ff.equals(null)); assertTrue(!ff.equals("a string not even a filter")); ff2.addFid("2"); assertTrue(!ff.equals(ff2)); ff.addFid("2"); assertEquals(ff, ff2); }