.build();

  public void testAllHashFunctionsHaveKnownHashes() throws Exception {
    for (Method method : Hashing.class.getDeclaredMethods()) {
      if (shouldHaveKnownHashes(method)) {
        HashFunction hashFunction = (HashFunction) method.invoke(Hashing.class);
        assertTrue(
            "There should be at least 3 entries in KNOWN_HASHES for " + hashFunction,