* running the same hash function on the equivalent input. For cross-language compatibility, use
   * {@link #putString}, usually with a charset of UTF-8. For other use cases, use {@code
   * putUnencodedChars}.
   *
   * @since 15.0 (since 11.0 as putString(CharSequence)).
   */
  @CanIgnoreReturnValue
  @Override
  Hasher putUnencodedChars(CharSequence charSequence);

  /**

    assertEquals(
        HashCode.fromBytes(mac.doFinal("!!!".getBytes(UTF_8))),
        Hashing.hmacSha1(SHA1_KEY)
            .newHasher()
            .putString("hello", UTF_8)
            .putString("world", UTF_8)
            .putString("!!!", UTF_8)
            .hash());
  }

  public void testCustomKey() throws Exception {
    SecretKey customKey =
        new SecretKey() {
          @Override

    assertEquals(
        HashCode.fromBytes(mac.doFinal("!!!".getBytes(UTF_8))),
        Hashing.hmacSha1(SHA1_KEY)
            .newHasher()
            .putString("hello", UTF_8)
            .putString("world", UTF_8)
            .putString("!!!", UTF_8)
            .hash());
  }

  public void testCustomKey() throws Exception {
    SecretKey customKey =
        new SecretKey() {
          @Override

      }
    }
  }

  public void testPutAfterHash() {
    Hasher sha1 = Hashing.sha1().newHasher();

    assertEquals(
        "2fd4e1c67a2d28fced849ee1bb76e7391b93eb12",
        sha1.putString("The quick brown fox jumps over the lazy dog", Charsets.UTF_8)
            .hash()
            .toString());
    assertThrows(IllegalStateException.class, () -> sha1.putInt(42));
  }

  public void testHashTwice() {

      }
    }
  }

  public void testPutAfterHash() {
    Hasher sha1 = Hashing.sha1().newHasher();

    assertEquals(
        "2fd4e1c67a2d28fced849ee1bb76e7391b93eb12",
        sha1.putString("The quick brown fox jumps over the lazy dog", Charsets.UTF_8)
            .hash()
            .toString());
    assertThrows(IllegalStateException.class, () -> sha1.putInt(42));
  }

  public void testHashTwice() {

          new TestHasher().putUnencodedChars(s).hash(),
          new TestHasher().putBytes(s.getBytes(UTF_16LE)).hash());
      assertEquals(
          new TestHasher().putUnencodedChars(s).hash(),
          new TestHasher().putString(s, UTF_16LE).hash());
    }
  }

  public void testFloat() {
    TestHasher hasher = new TestHasher();
    hasher.putFloat(Float.intBitsToFloat(0x04030201));
    hasher.assertBytes(new byte[] {1, 2, 3, 4});
  }

    StringCharsetFunnel(Charset charset) {
      this.charset = Preconditions.checkNotNull(charset);
    }

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

    @Override
    public String toString() {
      return "Funnels.stringFunnel(" + charset.name() + ")";
    }

    @Override

    for (int i = 0, len = charSequence.length(); i < len; i++) {
      putChar(charSequence.charAt(i));
    }
    return this;
  }

  @Override
  @CanIgnoreReturnValue
  public Hasher putString(CharSequence charSequence, Charset charset) {
    return putBytes(charSequence.toString().getBytes(charset));
  }

  @Override
  @CanIgnoreReturnValue
  public Hasher putBytes(byte[] bytes) {

          new TestHasher().putUnencodedChars(s).hash(),
          new TestHasher().putBytes(s.getBytes(UTF_16LE)).hash());
      assertEquals(
          new TestHasher().putUnencodedChars(s).hash(),
          new TestHasher().putString(s, UTF_16LE).hash());
    }
  }

  public void testFloat() {
    TestHasher hasher = new TestHasher();
    hasher.putFloat(Float.intBitsToFloat(0x04030201));
    hasher.assertBytes(new byte[] {1, 2, 3, 4});
  }

      assertEquals(
          new Sink(4).putUnencodedChars(s).hash(),
          new Sink(4).putBytes(s.getBytes(UTF_16LE)).hash());
      assertEquals(
          new Sink(4).putUnencodedChars(s).hash(), new Sink(4).putString(s, UTF_16LE).hash());
    }
  }

  public void testFloat() {
    Sink sink = new Sink(4);
    sink.putFloat(Float.intBitsToFloat(0x04030201));
    HashCode unused = sink.hash();
    sink.assertInvariants(4);