.isEqualTo("http://a$dotA126/")
    assertInvalid("http://aa$dotA126/", "Invalid URL host: \"aa$dotA126\"")
  }

  /**
   * UTS 46 Validity Criteria: Decoded punycode must be NFC.
   *
   * https://www.unicode.org/reports/tr46/#Validity_Criteria
   */
  @Test
  fun hostnameInPunycodeNfcAndNfd() {
    // café can be NFC (é is one code point) or NFD (e plus ´ as two code points).

     */
    fun protocols(protocols: List<Protocol>) =
      apply {
        // Create a private copy of the list.
        val protocolsCopy = protocols.toMutableList()

        // Validate that the list has everything we require and nothing we forbid.
        require(Protocol.H2_PRIOR_KNOWLEDGE in protocolsCopy || HTTP_1_1 in protocolsCopy) {