@Test public void testDifferences() throws Exception { BitSet bs1 = new BitSet(); BitSet bs2 = new BitSet(); bs1.set(0); bs2.set(0); bs1.set(1); bs1.set(2); bs2.set(2); bs1.set(3); bs2.set(4); Assert.assertEquals(3, FingerprinterTool.differences(bs1, bs2).size()); }