assertFalse(Utf8.isWellFormed(toByteArray(bytes)));
  }

  private static long[] generateFourByteShardsExpectedRunnables() {
    long[] expected = new long[128];
    // 0-63 are all 5300224
    for (int i = 0; i <= 63; i++) {
      expected[i] = 5300224;
    }
    // 97-111 are all 2342912
    for (int i = 97; i <= 111; i++) {
      expected[i] = 2342912;
    }
    // 113-117 are all 1048576

    assertFalse(Utf8.isWellFormed(toByteArray(bytes)));
  }

  private static long[] generateFourByteShardsExpectedRunnables() {
    long[] expected = new long[128];
    // 0-63 are all 5300224
    for (int i = 0; i <= 63; i++) {
      expected[i] = 5300224;
    }
    // 97-111 are all 2342912
    for (int i = 97; i <= 111; i++) {
      expected[i] = 2342912;
    }
    // 113-117 are all 1048576