}

  public void testWriteBytesToUndersizedArrayLongMaxLength() {
    byte[] dest = new byte[3];
    assertThrows(IndexOutOfBoundsException.class, () -> HASH_ABCD.writeBytesTo(dest, 0, 5));
  }

  public void testWriteBytesToUndersizedArrayShortMaxLength() {
    byte[] dest = new byte[3];
    HASH_ABCD.writeBytesTo(dest, 0, 2);

  }

  public void testWriteBytesToUndersizedArrayLongMaxLength() {
    byte[] dest = new byte[3];
    assertThrows(IndexOutOfBoundsException.class, () -> HASH_ABCD.writeBytesTo(dest, 0, 5));
  }

  public void testWriteBytesToUndersizedArrayShortMaxLength() {
    byte[] dest = new byte[3];
    HASH_ABCD.writeBytesTo(dest, 0, 2);

   * @return the number of bytes written to {@code dest}
   * @throws IndexOutOfBoundsException if there is not enough room in {@code dest}
   */
  @CanIgnoreReturnValue
  public int writeBytesTo(byte[] dest, int offset, int maxLength) {
    maxLength = min(maxLength, bits() / 8);
    Preconditions.checkPositionIndexes(offset, offset + maxLength, dest.length);
    writeBytesToImpl(dest, offset, maxLength);

    HashCode makeHash(Hasher[] hashers) {
      byte[] bytes = new byte[bits() / 8];
      int i = 0;
      for (Hasher hasher : hashers) {
        HashCode newHash = hasher.hash();
        i += newHash.writeBytesTo(bytes, i, newHash.bits() / 8);
      }
      return HashCode.fromBytesNoCopy(bytes);
    }

    @Override
    public int bits() {
      int bitSum = 0;
      for (HashFunction function : functions) {