.setDefault(byte[].class, "secret key".getBytes(UTF_8))
            .setDefault(HashCode.class, HashCode.fromLong(0));
    tester.testAllPublicStaticMethods(Hashing.class);
  }

  public void testSeedlessHashFunctionEquals() throws Exception {
    assertSeedlessHashFunctionEquals(Hashing.class);
  }

  public void testSeededHashFunctionEquals() throws Exception {
    assertSeededHashFunctionEquals(Hashing.class);
  }