}

  public void testForStrings() {
    PrimitiveSink primitiveSink = mock(PrimitiveSink.class);
    unencodedCharsFunnel().funnel("test", primitiveSink);
    verify(primitiveSink).putUnencodedChars("test");
  }

  public void testForStrings_null() {
    assertNullsThrowException(unencodedCharsFunnel());
  }

  public void testForStringsCharset() {

    String s = new String(chars);
    // this is the correct implementation of the spec
    for (int i = 0; i < s.length(); i++) {
      h1.putChar(s.charAt(i));
    }
    h2.putUnencodedChars(s);
    assertEquals(h1.hash(), h2.hash());
  }

  static class StreamingVersion extends AbstractHashFunction {
    @Override
    public int bits() {
      return 32;
    }

    @Override

    @Override
    public Hasher putBytes(ByteBuffer bytes) {
      ensureCapacity(bytes.remaining());
      buffer.put(bytes);
      return this;
    }

    @Override
    public Hasher putUnencodedChars(CharSequence charSequence) {
      ensureCapacity(charSequence.length() * Character.BYTES);
      for (int i = 0, len = charSequence.length(); i < len; i++) {
        buffer.putChar(charSequence.charAt(i));
      }

  }

  public void testStringsConsistency() {
    for (String s : Arrays.asList("", "some", "test", "strings", "to", "try")) {
      assertEquals(HASH_FN.newHasher().putUnencodedChars(s).hash(), HASH_FN.hashUnencodedChars(s));
    }
  }

  public void testUtf8() {
    char[] charsA = new char[128];
    char[] charsB = new char[128];

    for (int i = 0; i < charsA.length; i++) {

   * perform better than its longhand equivalent, but should not perform worse.
   *
   * @since 23.0
   */
  HashCode hashBytes(ByteBuffer input);

  /**
   * Shortcut for {@code newHasher().putUnencodedChars(input).hash()}. The implementation
   * <i>might</i> perform better than its longhand equivalent, but should not perform worse. Note
   * that no character encoding is performed; the low byte and high byte of each {@code char} are

  }

  private enum UnencodedCharsFunnel implements Funnel<CharSequence> {
    INSTANCE;

    @Override
    public void funnel(CharSequence from, PrimitiveSink into) {
      into.putUnencodedChars(from);
    }

    @Override
    public String toString() {
      return "Funnels.unencodedCharsFunnel()";
    }
  }

  /**