assertTrue(len4.matches('c'));
    assertTrue(len4.matches('d'));
    for (char c = 'e'; c < 'z'; c++) {
      assertFalse(len4.matches(c));
    }

    Random rand = new Random(1234);
    for (int testCase = 0; testCase < 100; testCase++) {
      char[] chars = randomChars(rand, rand.nextInt(63) + 1);
      CharMatcher m = SmallCharMatcher.from(bitSet(chars), new String(chars));

            1090, 12540, 1088, 12398, 95, 1089, 39, 1604, 33, 233, 12290, 30340, 1083, 1074, 12289,
            12531, 1082, 12356, 34, 3634, 91, 93, 63, 62, 1076, 225, 1605, 1084, 3609, 1610, 12395,
            12375, 1585, 1087, 1608, 12391, 12488, 3619, 1091, 12390, 243, 12377, 1606, 61, 3629,
            12473, 1578, 12427, 42, 12394, 12452, 12483, 12383, 12539, 3656, 12392, 3648, 12434,

  }

  @GwtIncompatible // Chars.fromByteArray
  public void testFromByteArray() {
    assertThat(Chars.fromByteArray(new byte[] {0x23, 0x45, (byte) 0xDC})).isEqualTo('\u2345');
    assertThat(Chars.fromByteArray(new byte[] {(byte) 0xFE, (byte) 0xDC})).isEqualTo('\uFEDC');
  }

  @GwtIncompatible // Chars.fromByteArray
  public void testFromByteArrayFails() {
    try {

    X2331,
    X2332,
    X2333,
    X2334,
    X2335,
    X2336,
    X2337,
    X2338,
    X2339,
    X2340,
    X2341,
    X2342,
    X2343,
    X2344,
    X2345,
    X2346,
    X2347,
    X2348,
    X2349,
    X2350,
    X2351,
    X2352,
    X2353,
    X2354,
    X2355,
    X2356,
    X2357,
    X2358,
    X2359,

    X2331,
    X2332,
    X2333,
    X2334,
    X2335,
    X2336,
    X2337,
    X2338,
    X2339,
    X2340,
    X2341,
    X2342,
    X2343,
    X2344,
    X2345,
    X2346,
    X2347,
    X2348,
    X2349,
    X2350,
    X2351,
    X2352,
    X2353,
    X2354,
    X2355,
    X2356,
    X2357,
    X2358,
    X2359,