private static final long ONE_BYTE_ROUNDTRIPPABLE_CHARACTERS = 0x007f - 0x0000 + 1;

  // 128
  private static final long EXPECTED_ONE_BYTE_ROUNDTRIPPABLE_COUNT =
      ONE_BYTE_ROUNDTRIPPABLE_CHARACTERS;

  // 1920 [chars 0x0080 to 0x07FF]
  private static final long TWO_BYTE_ROUNDTRIPPABLE_CHARACTERS = 0x07FF - 0x0080 + 1;

  // 18,304
  private static final long EXPECTED_TWO_BYTE_ROUNDTRIPPABLE_COUNT =

  private static final long ONE_BYTE_ROUNDTRIPPABLE_CHARACTERS = 0x007f - 0x0000 + 1;

  // 128
  private static final long EXPECTED_ONE_BYTE_ROUNDTRIPPABLE_COUNT =
      ONE_BYTE_ROUNDTRIPPABLE_CHARACTERS;

  // 1920 [chars 0x0080 to 0x07FF]
  private static final long TWO_BYTE_ROUNDTRIPPABLE_CHARACTERS = 0x07FF - 0x0080 + 1;

  // 18,304
  private static final long EXPECTED_TWO_BYTE_ROUNDTRIPPABLE_COUNT =

            3962, 36742, 26172, 23588, 30127, 38177, 36214, 32959, 32882, 20982, 36992, 40802,
            20179, 27424, 20018, 28450, 25932, 24674, 27745, 9475, 20740, 29627, 48292, 33146, 3928,
            32764, 36941, 1927, 32318, 26421, 35722, 35010, 3939, 21193, 44264, 26525, 22296, 3107,
            39569, 39658, 2637, 22615, 19992, 28171, 37034, 31684, 39575, 2454, 26609, 26825, 24736,

            3962, 36742, 26172, 23588, 30127, 38177, 36214, 32959, 32882, 20982, 36992, 40802,
            20179, 27424, 20018, 28450, 25932, 24674, 27745, 9475, 20740, 29627, 48292, 33146, 3928,
            32764, 36941, 1927, 32318, 26421, 35722, 35010, 3939, 21193, 44264, 26525, 22296, 3107,
            39569, 39658, 2637, 22615, 19992, 28171, 37034, 31684, 39575, 2454, 26609, 26825, 24736,