*
   * 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).
    val hostNfc = "café.com"
    val hostNfcPunycode = "xn--caf-dma.com"
    val hostNfd = "café.com"
    val hostNfdPunycode = "xn--cafe-yvc.com"