builder.addHeader("", "Value")
    }
  }

  @Test
  fun headerAllowsTabOnlyInValues() {
    val builder = Request.Builder()
    builder.header("key", "sample\tvalue")
    assertFailsWith<IllegalArgumentException> {
      builder.header("sample\tkey", "value")
    }
  }

  @Test
  fun headerForbidsControlCharacters() {
    assertForbiddenHeader("\u0000")

      builder.addHeader("", "Value")
    }
  }

  @Test
  fun headerAllowsTabOnlyInValues() {
    val builder = Request.Builder()
    builder.header("key", "sample\tvalue")
    assertFailsWith<IllegalArgumentException> {
      builder.header("sample\tkey", "value")
    }
  }

  @Test
  fun headerForbidsControlCharacters() {
    assertForbiddenHeader("\u0000")

tsurugi.ishikawa.jp tsuruoka.yamagata.jp tsuruta.aomori.jp tsushima.aichi.jp tsushima.nagasaki.jp tsuwano.shimane.jp tsuyama.okayama.jp tt tt.im tube tui tula.su tuleap-partners.com tunes tunk.org tur.ar tur.br turek.pl turin.it turystyka.pl tuscany.it tushu tuva.su tuxfamily.org tv tv.bb tv.bo tv.br tv.im tv.in tv.it tv.kg tv.na tv.sd tv.tr tv.tz tvedestrand.no tvs tw tw.cn twmail.cc twmail.net twmail.org tx.us tychy.pl tydal.no tynset.no typedream.app tysfjord.no tysnes.no tysvar.no tysvær.no tz tønsberg.no...