// the representable doubles are 2^54 and 2^54 + 4
    // 2^54+1 is less than halfway between, so HALF_DOWN and HALF_UP will both go down.
    new RoundToDoubleTester(BigDecimal.valueOf(1L << 54).add(new BigDecimal(0.5)))
        .setExpectation(twoToThe54, DOWN, FLOOR, HALF_DOWN, HALF_UP, HALF_EVEN)
        .setExpectation(Math.nextUp(twoToThe54), CEILING, UP)
        .roundUnnecessaryShouldThrow()
        .test();

 * including dots after the first colon. It matches IPv4 addresses as strings containing only
 * decimal digits and dots. This pattern matches strings like "a:.23" and "54" that are neither IP
 * addresses nor hostnames; they will be verified as IP addresses (which is a more strict
 * verification).
 */
private val VERIFY_AS_IP_ADDRESS = "([0-9a-fA-F]*:[0-9a-fA-F:.]*)|([\\d.]+)".toRegex()

  }

  private static final long[] roundToDoubleTestCandidates = {
    0,
    16,
    1L << 53,
    (1L << 53) + 1,
    (1L << 53) + 2,
    (1L << 53) + 3,
    (1L << 53) + 4,
    1L << 54,
    (1L << 54) + 1,
    (1L << 54) + 2,
    (1L << 54) + 3,
    (1L << 54) + 4,
    0x7ffffffffffffe00L, // halfway between 2^63 and next-lower double
    0x7ffffffffffffe01L, // above + 1

    assertEquals(Integer.valueOf(20), map.get(10));
    assertEquals(Integer.valueOf(0), map.get(20));
    assertEquals(Integer.valueOf(1), map.get(30));
    assertEquals(Integer.valueOf(2), map.get(54));
    assertEquals(Integer.valueOf(3), map.get(443));
    assertEquals(Integer.valueOf(4), map.get(1));
    assertEquals(Integer.valueOf(5), cache.get(6));
    assertEquals(Integer.valueOf(6), cache.apply(7));
  }

    bytesIn.writeUtf8("custom-value")
  }

  private fun checkReadThirdRequestWithoutHuffman() {
    assertThat(hpackReader!!.headerCount).isEqualTo(3)

    // [  1] (s =  54) custom-key: custom-value
    var entry = hpackReader!!.dynamicTable[readerHeaderTableLength() - 3]!!
    checkEntry(entry, "custom-key", "custom-value", 54)

    // [  2] (s =  53) cache-control: no-cache