@Test
public void testForLotsOfChange64() throws UnsupportedEncodingException {

  long h1 = MurmurHash.hash64A("abc".getBytes(Charsets.UTF_8), 0);
  long h2 = MurmurHash.hash64A("abc ".getBytes(Charsets.UTF_8), 0);
  int flipCount = Long.bitCount(h1 ^ h2);
  Assert.assertTrue("Small changes should result in lots of bit flips, only found " + flipCount, flipCount > 25);
}