assertThat(parse("http://[2001:db8::1]/").host).isEqualTo("2001:db8::1")
    assertThat(parse("http://[2001:db8:0:0:0:0:2:1]/").host).isEqualTo("2001:db8::2:1")
    assertThat(parse("http://[2001:db8:0:1:1:1:1:1]/").host).isEqualTo("2001:db8:0:1:1:1:1:1")
    assertThat(parse("http://[2001:db8:0:0:1:0:0:1]/").host).isEqualTo("2001:db8::1:0:0:1")
    assertThat(parse("http://[2001:0:0:1:0:0:0:1]/").host).isEqualTo("2001:0:0:1::1")

    serverWriter.writeClose(0, null)
    assertData("8800")
  }

  @Test fun serverCloseWithCode() {
    serverWriter.writeClose(1001, null)
    assertData("880203e9")
  }

  @Test fun serverCloseWithCodeAndReason() {
    serverWriter.writeClose(1001, "Hello".encodeUtf8())
    assertData("880703e948656c6c6f")
  }

  @Test fun clientEmptyClose() {
    clientWriter.writeClose(0, null)

    .build();
client.newCall(newYorkTimesRequest).enqueue(new Callback() {
  ...
});
```

Running this race over home WiFi shows the Times (`0002`) completes just slightly sooner than the Post (`0001`):

```
0001 https://www.washingtonpost.com/
0001 0.000 callStart
0002 https://www.nytimes.com/
0002 0.000 callStart
0002 0.010 dnsStart
0001 0.013 dnsStart
0001 0.022 dnsEnd
0002 0.019 dnsEnd

   *
   * Note that transport-layer success (receiving a HTTP response code, headers and body) does not
   * necessarily indicate application-layer success: `response` may still indicate an unhappy HTTP
   * response code like 404 or 500.
   */
  @Throws(IOException::class)
  fun onResponse(
    call: Call,
    response: Response,
  )

   00A0; NO-BREAK SPACE
   1680; OGHAM SPACE MARK
   2000; EN QUAD
   2001; EM QUAD
   2002; EN SPACE
   2003; EM SPACE
   2004; THREE-PER-EM SPACE
   2005; FOUR-PER-EM SPACE
   2006; SIX-PER-EM SPACE
   2007; FIGURE SPACE
   2008; PUNCTUATION SPACE
   2009; THIN SPACE
   200A; HAIR SPACE
   200B; ZERO WIDTH SPACE
   202F; NARROW NO-BREAK SPACE
   205F; MEDIUM MATHEMATICAL SPACE

      request = call.request(),
      connectTimeoutMillis = 10_000,
      readTimeoutMillis = 10_000,
      writeTimeoutMillis = 10_000,
    )
  }

  companion object {
    private const val PROXY_A_PORT = 1001
    private const val PROXY_A_HOST = "proxya"
    private val proxyA =
      Proxy(
        Proxy.Type.HTTP,
        InetSocketAddress.createUnresolved(PROXY_A_HOST, PROXY_A_PORT),
      )

    assertFailsWith<ProtocolException> {
      clientReader.processNextFrame()
    }.also { expected ->
      assertThat(expected.message)
        .isEqualTo("Code must be in range [1000,5000): 5000")
    }
  }

  @Test fun closeReservedSetThrows() {
    data.write("880203ec".decodeHex()) // Close with code 1004
    data.write("880203ed".decodeHex()) // Close with code 1005

  }

  private fun closeWebSockets(
    client: WebSocket,
    server: WebSocket,
  ) {
    server.close(1001, "")
    clientListener.assertClosing(1001, "")
    client.close(1000, "")
    serverListener.assertClosing(1000, "")
    clientListener.assertClosed(1001, "")
    serverListener.assertClosed(1000, "")
    clientListener.assertExhausted()
    serverListener.assertExhausted()
  }

[61:24:74]:98  s:http h:example.org p:/foo/[61:24:74]:98
http:[61:27]/:foo  s:http h:example.org p:/foo/[61:27]/:foo
http://[1::2]:3:4
http://2001::1
http://2001::1]
http://2001::1]:80
http://[2001::1]  s:http h:[2001::1] p:/
http://[2001::1]:80  s:http h:[2001::1] p:/
http:/example.com/  s:http h:example.org p:/example.com/
ftp:/example.com/  s:ftp h:example.com p:/
https:/example.com/  s:https h:example.com p:/

   *
   * Note that transport-layer success (receiving a HTTP response code, headers and body) does not
   * necessarily indicate application-layer success: `response` may still indicate an unhappy HTTP
   * response code like 404 or 500.
   *
   * @throws IOException if the request could not be executed due to cancellation, a connectivity
   *     problem or timeout. Because networks can fail during an exchange, it is possible that the