if (compress != -1) return null // Multiple "::" delimiters.
      i += 2
      b += 2
      compress = b
      if (i == limit) break
    } else if (b != 0) {
      // Group separator ":" delimiter.
      if (input.startsWith(":", startIndex = i)) {
        i++
      } else if (input.startsWith(".", startIndex = i)) {

    var delta = 0
    var bias = INITIAL_BIAS
    var h = b
    while (h < input.size) {
      val m = input.minBy { if (it >= n) it else Int.MAX_VALUE }

      val increment = (m - n) * (h + 1)
      if (delta > Int.MAX_VALUE - increment) return false // Prevent overflow.
      delta += increment

      n = m

      for (c in input) {
        if (c < n) {

from your test's `tearDown()`.

### API

#### MockResponse

Mock responses default to an empty response body and a `200` status code.
You can set a custom body with a string, input stream or byte array. Also
add headers with a fluent builder API.

```java
MockResponse response = new MockResponse()
    .addHeader("Content-Type", "application/json; charset=utf-8")

    "input": "aa--",
    "output": "aa--"
  },
  {
    "input": "a†--",
    "output": "xn--a---kp0a"
  },
  {
    "input": "ab--c",
    "output": "ab--c"
  },
  {
    "comment": "Label with leading hyphen",
    "input": "-x",
    "output": "-x"
  },
  {
    "input": "-†",
    "output": "xn----xhn"
  },
  {
    "input": "-x.xn--zca",
    "output": "-x.xn--zca"

) {
  /**
   * Returns [input] in canonical form according to these rules, or null if no such canonical form
   * exists for it.
   */
  operator fun invoke(input: String): String? = invoke(Buffer().writeUtf8(input))

  internal operator fun invoke(input: BufferedSource): String? {
    // 1. Map.
    val mapResult = Buffer()
    while (!input.exhausted()) {
      val codePoint = input.readUtf8CodePoint()

      }
    }

    private fun isDot(input: String): Boolean {
      return input == "." || input.equals("%2e", ignoreCase = true)
    }

    private fun isDotDot(input: String): Boolean {
      return input == ".." ||
        input.equals("%2e.", ignoreCase = true) ||
        input.equals(".%2e", ignoreCase = true) ||
        input.equals("%2e%2e", ignoreCase = true)
    }

    /**

      inet4AddressToAscii(
        byteArrayOf(255.toByte(), 255.toByte(), 255.toByte(), 255.toByte()),
      ),
    ).isEqualTo("255.255.255.255")
  }

  private fun decodeIpv6(input: String): ByteArray? = decodeIpv6(input, 0, input.length)

  @Test
  fun testToCanonicalHost() {
    // IPv4
    assertThat("127.0.0.1".toCanonicalHost()).isEqualTo("127.0.0.1")

 * Each line of the `urltestdata.txt` file specifies a test. Lines look like this:
 *
 * ```
 * http://example\t.\norg http://example.org/foo/bar s:http h:example.org p:/
 * ```
 */
class WebPlatformUrlTestData {
  var input: String? = null
  var base: String? = null
  var scheme = ""
  var username = ""
  var password: String? = null
  var host = ""
  var port = ""
  var path = ""
  var query = ""
  var fragment = ""

 *
 * Each test is a line of the file `toascii.json`.
 */
@Serializable
class WebPlatformToAsciiData {
  var input: String? = null
  var output: String? = null
  var comment: String? = null

  override fun toString() = "input=$input output=$output"

  companion object {
    fun load(): List<WebPlatformToAsciiData> {

    val request = server.takeRequest()
    assertThat(request.headers["Accept-Encoding"]).isEqualTo("custom")
  }

  /**
   * Test a bug where gzip input streams weren't exhausting the input stream, which corrupted the
   * request that followed or prevented connection reuse. http://code.google.com/p/android/issues/detail?id=7059
   * http://code.google.com/p/android/issues/detail?id=38817
   */