assertInvalid("http://\n/", "Invalid URL host: \"\n\"")
    assertInvalid("http:// /", "Invalid URL host: \" \"")
    assertInvalid("http://%20/", "Invalid URL host: \"%20\"")
  }

  @Test
  fun hostnameLowercaseCharactersMappedDirectly() {
    assertThat(parse("http://abcd").host).isEqualTo("abcd")
    assertThat(parse("http://σ").host).isEqualTo("xn--4xa")
  }

  @Test
  fun hostnameUppercaseCharactersConvertedToLowercase() {