@Test
    @DisplayName("Should convert long to hex string with padding")
    void testLongToHexString() {
        // Test various long values
        assertEquals("0000000000000000", Hexdump.toHexString(0L, 16));
        assertEquals("00000000000000FF", Hexdump.toHexString(255L, 16));
        assertEquals("FFFFFFFFFFFFFFFF", Hexdump.toHexString(-1L, 16));

        // Test different sizes

    void testToHexStringLong() {
        // Test zero
        assertEquals("0000000000000000", Hexdump.toHexString(0L, 16));
        assertEquals("00000000", Hexdump.toHexString(0L, 8));
        assertEquals("0000", Hexdump.toHexString(0L, 4));

        // Test positive values
        assertEquals("00000000000000FF", Hexdump.toHexString(255L, 16));
        assertEquals("000000FF", Hexdump.toHexString(255L, 8));

    val socket =
      MockWebServerSocket(
        FakeSocket(
          localAddress =
            InetAddress.getByAddress(
              "::1",
              byteArrayOf(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1),
            ),
          localPort = 80,
        ),
      )
    val request = RecordedRequest(DEFAULT_REQUEST_LINE_HTTP_1, headers, emptyList(), 0, ByteString.EMPTY, 0, 0, socket)

    for (i in 0..0x3f) formattedFlags.add(formatFlags(TYPE_HEADERS, i))
    assertThat(formattedFlags).containsExactly(
      "",
      "END_STREAM",
      "00000010",
      "00000011",
      "END_HEADERS",
      "END_STREAM|END_HEADERS",
      "00000110",
      "00000111",
      "PADDED",
      "END_STREAM|PADDED",
      "00001010",
      "00001011",
      "00001100",

    assertInvalid(
      "http://[0:0:0:0:0:1:0.0.0.000000]/",
      "Invalid URL host: \"[0:0:0:0:0:1:0.0.0.000000]\"",
    )
    assertInvalid(
      "http://[0:0:0:0:0:1:0.010.0.010]/",
      "Invalid URL host: \"[0:0:0:0:0:1:0.010.0.010]\"",
    )
    assertInvalid(
      "http://[0:0:0:0:0:1:0.0.0.000001]/",
      "Invalid URL host: \"[0:0:0:0:0:1:0.0.0.000001]\"",
    )
  }

  @Test

		"\x020000000000000000000" +
		"00000\v\x00\x00\x00\x00\x00000000000" +
		"00000000000000PK\x01\x0200" +
		"00000000000000000000" +
		"00\v\x00\x00\x00\x00\x00000000000000" +
		"00000000000PK\x01\x020000<" +
		"0\x00\x0000000000000000\v\x00\v" +
		"\x00\x00\x00\x00\x0000000000\x00\x00\x00\x00000" +
		"00000000PK\x01\x0200000000" +
		"0000000000000000\v\x00\x00\x00" +
		"\x00\x0000PK\x05\x06000000\x05\x00\xfd\x00\x00\x00" +

\sfoo.com\s\s  s:http h:example.org p:/foo/foo.com
a:\t\sfoo.com  s:a p:\sfoo.com
http://f:21/\sb\s?\sd\s#\se\s  s:http h:f port:21 p:/%20b%20 q:?%20d%20 f:#\se
http://f:/c  s:http h:f p:/c
http://f:0/c  s:http h:f port:0 p:/c
http://f:00000000000000/c  s:http h:f port:0 p:/c
http://f:00000000000000000000080/c  s:http h:f p:/c
http://f:b/c
http://f:\s/c
http://f:\n/c  s:http h:f p:/c
http://f:fifty-two/c
http://f:999999/c  s:http h:f port:999999 p:/c

      ).toString(),
    ).isEqualTo("example.com:1003 via proxy 1.2.3.4:5678")
  }

  @Test fun routeToStringIpv6() {
    val ipv6Address =
      InetAddress.getByAddress(
        byteArrayOf(0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1),
      )
    assertThat(
      Route(
        factory.newAddress(uriHost = "::1", uriPort = 1003),
        Proxy.NO_PROXY,
        InetSocketAddress(ipv6Address, uriPort),

    100L,
    1000L,
    10000L,
    100000L,
    1000000L,
    10000000L,
    100000000L,
    1000000000L,
    10000000000L,
    100000000000L,
    1000000000000L,
    10000000000000L,
    100000000000000L,
    1000000000000000L,
    10000000000000000L,
    100000000000000000L,
    1000000000000000000L
  };

  // halfPowersOf10[i] = largest long less than 10^(i + 0.5)

make([]byte, emLen) psLen := emLen - sLen - hLen - 2 db := em[:psLen+1+sLen] h := em[psLen+1+sLen : emLen-1] // 4. Generate a random octet string salt of length sLen; if sLen = 0, // then salt is the empty string. // // 5. Let // M' = (0x)00 00 00 00 00 00 00 00 || mHash || salt; // // M' is an octet string of length 8 + hLen + sLen with eight // initial zero octets. // // 6. Let H = Hash(M'), an octet string of length hLen. var prefix [8]byte hash.Reset() hash.Write(prefix[:]) hash.Write(mHash) hash.Write(salt)...