val body = "\u0800".toRequestBody(contentType)
    assertThat(body.contentType()).isEqualTo("text/plain; charset=utf-8".toMediaType())
    assertThat(body.contentLength()).isEqualTo(3)
    assertThat(bodyToHex(body)).isEqualTo("e0a080")
  }

  @Test
  fun stringWithNonDefaultCharsetSpecified() {
    val contentType = "text/plain; charset=utf-16be".toMediaType()
    val body = "\u0800".toRequestBody(contentType)

   30000-3FFFD
   40000-4FFFD
   50000-5FFFD
   60000-6FFFD
   70000-7FFFD
   80000-8FFFD
   90000-9FFFD
   A0000-AFFFD
   B0000-BFFFD
   C0000-CFFFD
   D0000-DFFFD
   E0000
   E0002-E001F

   * code itself encoded as UTF-8 sequence.
   */
  @Test fun prohibitionSurrogateCodes() {
    // UTF-8 encoding of the high surrogate U+D800.
    assertThat(stringPrep(Buffer().write("eda080".decodeHex()))).isNull()
  }

  @Test fun prohibitionInappropriateForPlainText() {
    assertThat(stringPrep("\ufff9")).isNull()
    assertThat(stringPrep("\ufffc")).isNull()
  }

   E0001; LANGUAGE TAG

  }

  @Test
  fun fragmentNonAsciiThatOffendsJavaNetUri() {
    val url = "http://host/#\u0080".toHttpUrl()
    assertThat(url.toString()).isEqualTo("http://host/#\u0080")
    assertThat(url.fragment).isEqualTo("\u0080")
    assertThat(url.encodedFragment).isEqualTo("\u0080")
    // Control characters may be stripped!
    assertThat(url.toUri()).isEqualTo(URI("http://host/#"))
  }

  @Test

   0080-009F; [CONTROL CHARACTERS]
   06DD; ARABIC END OF AYAH
   070F; SYRIAC ABBREVIATION MARK
   180E; MONGOLIAN VOWEL SEPARATOR
   200C; ZERO WIDTH NON-JOINER
   200D; ZERO WIDTH JOINER
   2028; LINE SEPARATOR
   2029; PARAGRAPH SEPARATOR
   2060; WORD JOINER
   2061; FUNCTION APPLICATION
   2062; INVISIBLE TIMES
   2063; INVISIBLE SEPARATOR
   206A-206F; [CONTROL CHARACTERS]
   FEFF; ZERO WIDTH NO-BREAK SPACE

  }

  @Test fun ignored() {
    assertThat("\u200b".map()).isEqualTo("")
    assertThat("\ufeff".map()).isEqualTo("")
  }

  @Test fun disallowed() {
    assertThat("\u0080".mapExpectingErrors()).isEqualTo("\u0080")
  }

  @Test fun disallowedStd3Valid() {
    assertThat("_".map()).isEqualTo("_")
    assertThat("/".map()).isEqualTo("/")
    assertThat("≠".map()).isEqualTo("≠")
  }

   E000-F8FF; [PRIVATE USE, PLANE 0]
   F0000-FFFFD; [PRIVATE USE, PLANE 15]

    assertUnescaped(e, '_');
    assertUnescaped(e, '.');
    assertUnescaped(e, '*');

    assertEscaping(e, "%00", '\u0000'); // nul
    assertEscaping(e, "%7F", '\u007f'); // del
    assertEscaping(e, "%C2%80", '\u0080'); // xx-00010,x-000000
    assertEscaping(e, "%DF%BF", '\u07ff'); // xx-11111,x-111111
    assertEscaping(e, "%E0%A0%80", '\u0800'); // xxx-0000,x-100000,x-00,0000

      }
    }

    // Testing multibyte escape sequences
    assertEscaping(e, "%00", '\u0000'); // nul
    assertEscaping(e, "%7F", '\u007f'); // del
    assertEscaping(e, "%C2%80", '\u0080'); // xx-00010,x-000000
    assertEscaping(e, "%DF%BF", '\u07ff'); // xx-11111,x-111111
    assertEscaping(e, "%E0%A0%80", '\u0800'); // xxx-0000,x-100000,x-00,0000