/*
 * test_TextDecoderOptions.js
 * bug 764234 tests
 */

/* eslint-env mozilla/testharness */

function runTextDecoderOptions() {
  const data = [
    0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab,
    0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
    0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0xc1, 0xc2, 0xc3,
    0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
    0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdf,
    0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb,
    0xec, 0xed, 0xee, 0xef, 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
    0xf8, 0xf9, 0xfa, 0xfb,
  ];

  const expectedString =
    "\u00a0\u0e01\u0e02\u0e03\u0e04\u0e05\u0e06\u0e07" +
    "\u0e08\u0e09\u0e0a\u0e0b\u0e0c\u0e0d\u0e0e\u0e0f" +
    "\u0e10\u0e11\u0e12\u0e13\u0e14\u0e15\u0e16\u0e17" +
    "\u0e18\u0e19\u0e1a\u0e1b\u0e1c\u0e1d\u0e1e\u0e1f" +
    "\u0e20\u0e21\u0e22\u0e23\u0e24\u0e25\u0e26\u0e27" +
    "\u0e28\u0e29\u0e2a\u0e2b\u0e2c\u0e2d\u0e2e\u0e2f" +
    "\u0e30\u0e31\u0e32\u0e33\u0e34\u0e35\u0e36\u0e37" +
    "\u0e38\u0e39\u0e3a\u0e3f\u0e40\u0e41\u0e42\u0e43" +
    "\u0e44\u0e45\u0e46\u0e47\u0e48\u0e49\u0e4a\u0e4b" +
    "\u0e4c\u0e4d\u0e4e\u0e4f\u0e50\u0e51\u0e52\u0e53" +
    "\u0e54\u0e55\u0e56\u0e57\u0e58\u0e59\u0e5a\u0e5b";

  test(testDecoderGetEncoding, "testDecoderGetEncoding");
  test(testDecodeGreek, "testDecodeGreek");
  test(function () {
    testConstructorFatalOption(data, expectedString);
  }, "testConstructorFatalOption");
  test(function () {
    testConstructorEncodingOption(data, expectedString);
  }, "testConstructorEncodingOption");
  test(function () {
    testDecodeStreamOption(data, expectedString);
  }, "testDecodeStreamOption");
  test(testDecodeStreamCompositions, "testDecodeStreamCompositions");
  test(function () {
    testDecodeABVOption(data, expectedString);
  }, "testDecodeABVOption");
  test(testDecoderForThaiEncoding, "testDecoderForThaiEncoding");
  test(testInvalid2022JP, "testInvalid2022JP");
  test(testDecoderForBig5, "testDecoderForBig5");
}

/*
 * function testConstructor()
 *
 * - This function tests the constructor optional arguments.
 * - Stream option remains null for this test.
 * - The stream option is passed to the decode function.
 * - This function is not testing the decode function.
 *
 */
function testConstructorFatalOption() {
  //invalid string to decode passed, fatal = false
  testCharset({
    fatal: false,
    encoding: "iso-8859-11",
    input: [],
    expected: "",
    msg: "constructor fatal option set to false test.",
  });

  //invalid string to decode passed, fatal = true
  testCharset({
    fatal: true,
    encoding: "iso-8859-11",
    input: [],
    expected: "",
    msg: "constructor fatal option set to true test.",
  });
}

function testConstructorEncodingOption(aData, aExpectedString) {
  function errorMessage(encoding) {
    return `TextDecoder constructor: The given encoding '${String(
      encoding
    ).trim()}' is not supported.`;
  }

  // valid encoding passed
  var encoding = "iso-8859-11";
  testCharset({
    encoding,
    input: aData,
    expected: aExpectedString,
    msg: "decoder testing constructor valid encoding.",
  });

  // passing spaces for encoding
  encoding = "   ";
  testCharset({
    encoding,
    input: aData,
    error: "RangeError",
    errorMessage: errorMessage(encoding),
    msg: "constructor encoding, spaces encoding test.",
  });

  // invalid encoding passed
  encoding = "asdfasdf";
  testCharset({
    encoding,
    input: aData,
    error: "RangeError",
    errorMessage: errorMessage(encoding),
    msg: "constructor encoding, invalid encoding test.",
  });

  // null encoding passed
  encoding = null;
  testCharset({
    encoding,
    input: aData,
    error: "RangeError",
    errorMessage: errorMessage(encoding),
    msg: 'constructor encoding, "null" encoding test.',
  });

  // empty encoding passed
  encoding = "";
  testCharset({
    encoding,
    input: aData,
    error: "RangeError",
    errorMessage: errorMessage(encoding),
    msg: "constructor encoding, empty encoding test.",
  });

  // replacement character test
  aExpectedString =
    "\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd" +
    "\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd" +
    "\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd" +
    "\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd" +
    "\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd" +
    "\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd" +
    "\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd" +
    "\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd" +
    "\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd" +
    "\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd" +
    "\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd\ufffd";
  testCharset({
    encoding: "utf-8",
    input: aData,
    expected: aExpectedString,
    msg: "constuctor encoding, utf-8 test.",
  });
}

/*
 * function testDecodeStreamOption()
 *
 * - fatal remains null for the entire test
 * - encoding remains as "iso-8859-11"
 * - The stream option is modified for this test.
 * - ArrayBufferView is modified for this test.
 */
function testDecodeStreamOption(data, expectedString) {
  const streamData = [];
  const expectedStreamString = [];
  const chunkSize = data.length / 3;
  for (let i = 0; i < data.length; i += chunkSize) {
    streamData.push(data.slice(i, i + chunkSize));
    expectedStreamString.push(expectedString.slice(i, i + chunkSize));
  }

  // streaming test

  /* - the streaming is null
   *  - streaming is not set in the decode function
   */
  testCharset({
    encoding: "iso-8859-11",
    array: [
      { input: streamData[0], expected: expectedStreamString[0] },
      { input: streamData[1], expected: expectedStreamString[1] },
      { input: streamData[2], expected: expectedStreamString[2] },
    ],
    msg: "decode() stream test zero.",
  });

  testCharset({
    encoding: "iso-8859-11",
    array: [
      { input: streamData[0], expected: expectedStreamString[0], stream: true },
      { input: streamData[1], expected: expectedStreamString[1], stream: true },
      { input: streamData[2], expected: expectedStreamString[2], stream: true },
    ],
    msg: "decode() stream test one.",
  });

  testCharset({
    encoding: "iso-8859-11",
    array: [
      { input: streamData[0], expected: expectedStreamString[0], stream: true },
      { input: streamData[1], expected: expectedStreamString[1] },
      { input: streamData[2], expected: expectedStreamString[2] },
    ],
    msg: "decode() stream test two.",
  });

  testCharset({
    encoding: "utf-8",
    array: [
      { input: [0xc2], expected: "\uFFFD" },
      { input: [0x80], expected: "\uFFFD" },
    ],
    msg: "decode() stream test utf-8.",
  });

  testCharset({
    encoding: "utf-8",
    fatal: true,
    array: [
      { input: [0xc2], error: "TypeError" },
      { input: [0x80], error: "TypeError" },
    ],
    msg: "decode() stream test utf-8 fatal.",
  });
}

function testDecodeStreamCompositions() {
  var tests = [
    { encoding: "utf-8", input: [0xc2, 0x80], expected: ["", "\x80"] },
    {
      encoding: "utf-8",
      input: [0xef, 0xbb, 0xbf, 0xc2, 0x80],
      expected: ["", "", "", "", "\x80"],
    },
    { encoding: "utf-16", input: [0x01, 0x00], expected: ["", "\x01"] },
    {
      encoding: "utf-16",
      input: [0x01, 0x00, 0x03, 0x02],
      expected: ["", "\x01", "", "\u0203"],
    },
    { encoding: "utf-16", input: [0xff, 0xfd], expected: ["", "\uFDFF"] },
    { encoding: "utf-16", input: [0xff, 0xfe], expected: ["", ""] },
    { encoding: "utf-16", input: [0xff, 0xff], expected: ["", "\uFFFF"] },
    {
      encoding: "utf-16",
      input: [0xff, 0xfe, 0x01, 0x00],
      expected: ["", "", "", "\x01"],
    },
    {
      encoding: "utf-16",
      input: [0xff, 0xfe, 0xff, 0xfe],
      expected: ["", "", "", "\uFEFF"],
    },
    {
      encoding: "utf-16",
      input: [0xff, 0xfe, 0xfe, 0xff],
      expected: ["", "", "", "\uFFFE"],
    },
    { encoding: "utf-16", input: [0xfd, 0xfe], expected: ["", "\uFEFD"] },
    { encoding: "utf-16", input: [0xfd, 0xff], expected: ["", "\uFFFD"] },
    { encoding: "utf-16", input: [0xfe, 0xfd], expected: ["", "\uFDFE"] },
    { encoding: "utf-16", input: [0xfe, 0xfe], expected: ["", "\uFEFE"] },
    { encoding: "utf-16", input: [0xfe, 0xff], expected: ["", "\uFFFE"] },
    {
      encoding: "utf-16",
      input: [0xfe, 0xff, 0x01, 0x00],
      expected: ["", "\uFFFE", "", "\x01"],
    },
    {
      encoding: "utf-16",
      input: [0xfe, 0xff, 0xff, 0xfe],
      expected: ["", "\uFFFE", "", "\uFEFF"],
    },
    {
      encoding: "utf-16",
      input: [0xfe, 0xff, 0xfe, 0xff],
      expected: ["", "\uFFFE", "", "\uFFFE"],
    },
    { encoding: "utf-16le", input: [0x01, 0x00], expected: ["", "\x01"] },
    {
      encoding: "utf-16le",
      input: [0x01, 0x00, 0x03, 0x02],
      expected: ["", "\x01", "", "\u0203"],
    },
    {
      encoding: "utf-16le",
      input: [0xff, 0xfe, 0x01, 0x00],
      expected: ["", "", "", "\x01"],
    },
    {
      encoding: "utf-16le",
      input: [0xfe, 0xff, 0x01, 0x00],
      expected: ["", "\uFFFE", "", "\x01"],
    },
    { encoding: "utf-16be", input: [0x01, 0x00], expected: ["", "\u0100"] },
    {
      encoding: "utf-16be",
      input: [0x01, 0x00, 0x03, 0x02],
      expected: ["", "\u0100", "", "\u0302"],
    },
    { encoding: "utf-16be", input: [0xfd, 0xfe], expected: ["", "\uFDFE"] },
    { encoding: "utf-16be", input: [0xfd, 0xff], expected: ["", "\uFDFF"] },
    { encoding: "utf-16be", input: [0xfe, 0xfd], expected: ["", "\uFEFD"] },
    { encoding: "utf-16be", input: [0xfe, 0xfe], expected: ["", "\uFEFE"] },
    { encoding: "utf-16be", input: [0xfe, 0xff], expected: ["", ""] },
    {
      encoding: "utf-16be",
      input: [0xfe, 0xff, 0x01, 0x00],
      expected: ["", "", "", "\u0100"],
    },
    { encoding: "utf-16be", input: [0xff, 0xfd], expected: ["", "\uFFFD"] },
    { encoding: "utf-16be", input: [0xff, 0xfe], expected: ["", "\uFFFE"] },
    { encoding: "utf-16be", input: [0xff, 0xff], expected: ["", "\uFFFF"] },
    {
      encoding: "utf-16be",
      input: [0xff, 0xfe, 0x01, 0x00],
      expected: ["", "\uFFFE", "", "\u0100"],
    },
    { encoding: "shift_jis", input: [0x81, 0x40], expected: ["", "\u3000"] },
  ];
  tests.forEach(function (t) {
    (function generateCompositions(a, n) {
      a.push(n);
      var l = a.length - 1;
      var array = [];
      for (var i = 0, o = 0; i <= l; i++) {
        array.push({
          input: t.input.slice(o, o + a[i]),
          expected: t.expected.slice(o, (o += a[i])).join(""),
          stream: i < l,
        });
      }
      testCharset({
        encoding: t.encoding,
        array,
        msg: "decode() stream test " + t.encoding + " " + a.join("-") + ".",
      });
      while (a[l] > 1) {
        a[l]--;
        generateCompositions(a.slice(0), n - a[l]);
      }
    })([], t.input.length);
  });
}

/*
 * function testDecodeABVOption()
 *
 * - ABV for ArrayBufferView
 * - fatal remains null for the entire test
 * - encoding remains as "iso-8859-11"
 * - The stream option is modified for this test.
 * - ArrayBufferView is modified for this test.
 */
function testDecodeABVOption(data, expectedString) {
  // valid data
  testCharset({
    encoding: "iso-8859-11",
    input: data,
    expected: expectedString,
    msg: "decode test ABV valid data.",
  });

  // invalid empty data
  testCharset({
    encoding: "iso-8859-11",
    input: [],
    expected: "",
    msg: "decode test ABV empty data.",
  });

  // spaces
  testCharset({
    encoding: "iso-8859-11",
    input: ["\u0020\u0020"],
    expected: "\0",
    msg: "text decoding ABV string test.",
  });

  testCharset({
    encoding: "iso-8859-11",
    input: [""],
    expected: "\0",
    msg: "text decoding ABV empty string test.",
  });

  // null for Array Buffer
  testCharset({
    encoding: "iso-8859-11",
    input: null,
    error: "TypeError",
    msg: "text decoding ABV null test.",
  });
}

function testDecodeGreek() {
  var data = [
    0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab,
    0xac, 0xad, 0xaf, 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, 0xb8,
    0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0xc1, 0xc2, 0xc3, 0xc4,
    0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, 0xd0,
    0xd1, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd,
    0xde, 0xdf, 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9,
    0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5,
    0xf6, 0xf7, 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe,
  ];

  var expectedString =
    "\u00a0\u2018\u2019\u00a3\u20ac\u20af\u00a6\u00a7\u00a8" +
    "\u00a9\u037a\u00ab\u00ac\u00ad\u2015\u00b0\u00b1" +
    "\u00b2\u00b3\u0384\u0385\u0386\u00b7\u0388\u0389" +
    "\u038a\u00bb\u038c\u00bd\u038e\u038f\u0390\u0391" +
    "\u0392\u0393\u0394\u0395\u0396\u0397\u0398\u0399" +
    "\u039a\u039b\u039c\u039d\u039e\u039f\u03a0\u03a1" +
    "\u03a3\u03a4\u03a5\u03a6\u03a7\u03a8\u03a9\u03aa" +
    "\u03ab\u03ac\u03ad\u03ae\u03af\u03b0\u03b1\u03b2" +
    "\u03b3\u03b4\u03b5\u03b6\u03b7\u03b8\u03b9\u03ba" +
    "\u03bb\u03bc\u03bd\u03be\u03bf\u03c0\u03c1\u03c2" +
    "\u03c3\u03c4\u03c5\u03c6\u03c7\u03c8\u03c9\u03ca" +
    "\u03cb\u03cc\u03cd\u03ce";

  testCharset({
    encoding: "greek",
    input: data,
    expected: expectedString,
    msg: "decode greek test.",
  });
}

function testDecoderForThaiEncoding() {
  // TEST One
  const data = [
    0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, 0xa8, 0xa9, 0xaa, 0xab,
    0xac, 0xad, 0xae, 0xaf, 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
    0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, 0xc0, 0xc1, 0xc2, 0xc3,
    0xc4, 0xc5, 0xc6, 0xc7, 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
    0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, 0xd8, 0xd9, 0xda, 0xdf,
    0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, 0xe8, 0xe9, 0xea, 0xeb,
    0xec, 0xed, 0xee, 0xef, 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
    0xf8, 0xf9, 0xfa, 0xfb,
  ];

  const expectedString =
    "\u00a0\u0e01\u0e02\u0e03\u0e04\u0e05\u0e06\u0e07\u0e08\u0e09\u0e0a\u0e0b\u0e0c\u0e0d\u0e0e\u0e0f\u0e10\u0e11\u0e12\u0e13\u0e14\u0e15\u0e16\u0e17\u0e18\u0e19\u0e1a\u0e1b\u0e1c\u0e1d\u0e1e\u0e1f\u0e20\u0e21\u0e22\u0e23\u0e24\u0e25\u0e26\u0e27\u0e28\u0e29\u0e2a\u0e2b\u0e2c\u0e2d\u0e2e\u0e2f\u0e30\u0e31\u0e32\u0e33\u0e34\u0e35\u0e36\u0e37\u0e38\u0e39\u0e3a\u0e3f\u0e40\u0e41\u0e42\u0e43\u0e44\u0e45\u0e46\u0e47\u0e48\u0e49\u0e4a\u0e4b\u0e4c\u0e4d\u0e4e\u0e4f\u0e50\u0e51\u0e52\u0e53\u0e54\u0e55\u0e56\u0e57\u0e58\u0e59\u0e5a\u0e5b";

  testCharset({
    encoding: "iso-8859-11",
    input: data,
    expected: expectedString,
    msg: "decoder testing valid ISO-8859-11 encoding.",
  });
}

function testDecoderGetEncoding() {
  var labelEncodings = [
    { encoding: "utf-8", labels: ["unicode-1-1-utf-8", "utf-8", "utf8"] },
    { encoding: "ibm866", labels: ["866", "cp866", "csibm866", "ibm866"] },
    {
      encoding: "iso-8859-2",
      labels: [
        "csisolatin2",
        "iso-8859-2",
        "iso-ir-101",
        "iso8859-2",
        "iso88592",
        "iso_8859-2",
        "iso_8859-2:1987",
        "l2",
        "latin2",
      ],
    },
    {
      encoding: "iso-8859-3",
      labels: [
        "csisolatin3",
        "iso-8859-3",
        "iso-ir-109",
        "iso8859-3",
        "iso88593",
        "iso_8859-3",
        "iso_8859-3:1988",
        "l3",
        "latin3",
      ],
    },
    {
      encoding: "iso-8859-4",
      labels: [
        "csisolatin4",
        "iso-8859-4",
        "iso-ir-110",
        "iso8859-4",
        "iso88594",
        "iso_8859-4",
        "iso_8859-4:1988",
        "l4",
        "latin4",
      ],
    },
    {
      encoding: "iso-8859-5",
      labels: [
        "csisolatincyrillic",
        "cyrillic",
        "iso-8859-5",
        "iso-ir-144",
        "iso8859-5",
        "iso88595",
        "iso_8859-5",
        "iso_8859-5:1988",
      ],
    },
    {
      encoding: "iso-8859-6",
      labels: [
        "arabic",
        "asmo-708",
        "csiso88596e",
        "csiso88596i",
        "csisolatinarabic",
        "ecma-114",
        "iso-8859-6",
        "iso-8859-6-e",
        "iso-8859-6-i",
        "iso-ir-127",
        "iso8859-6",
        "iso88596",
        "iso_8859-6",
        "iso_8859-6:1987",
      ],
    },
    {
      encoding: "iso-8859-7",
      labels: [
        "csisolatingreek",
        "ecma-118",
        "elot_928",
        "greek",
        "greek8",
        "iso-8859-7",
        "iso-ir-126",
        "iso8859-7",
        "iso88597",
        "iso_8859-7",
        "iso_8859-7:1987",
        "sun_eu_greek",
      ],
    },
    {
      encoding: "iso-8859-8",
      labels: [
        "csiso88598e",
        "csisolatinhebrew",
        "hebrew",
        "iso-8859-8",
        "iso-8859-8-e",
        "iso-ir-138",
        "iso8859-8",
        "iso88598",
        "iso_8859-8",
        "iso_8859-8:1988",
        "visual",
      ],
    },
    {
      encoding: "iso-8859-8-i",
      labels: ["csiso88598i", "iso-8859-8-i", "logical"],
    },
    {
      encoding: "iso-8859-10",
      labels: [
        "csisolatin6",
        "iso-8859-10",
        "iso-ir-157",
        "iso8859-10",
        "iso885910",
        "l6",
        "latin6",
      ],
    },
    {
      encoding: "iso-8859-13",
      labels: ["iso-8859-13", "iso8859-13", "iso885913"],
    },
    {
      encoding: "iso-8859-14",
      labels: ["iso-8859-14", "iso8859-14", "iso885914"],
    },
    {
      encoding: "iso-8859-15",
      labels: [
        "csisolatin9",
        "iso-8859-15",
        "iso8859-15",
        "iso885915",
        "iso_8859-15",
        "l9",
      ],
    },
    { encoding: "iso-8859-16", labels: ["iso-8859-16"] },
    {
      encoding: "koi8-r",
      labels: ["cskoi8r", "koi", "koi8", "koi8-r", "koi8_r"],
    },
    { encoding: "koi8-u", labels: ["koi8-u"] },
    {
      encoding: "macintosh",
      labels: ["csmacintosh", "mac", "macintosh", "x-mac-roman"],
    },
    {
      encoding: "windows-874",
      labels: [
        "dos-874",
        "iso-8859-11",
        "iso8859-11",
        "iso885911",
        "tis-620",
        "windows-874",
      ],
    },
    {
      encoding: "windows-1250",
      labels: ["cp1250", "windows-1250", "x-cp1250"],
    },
    {
      encoding: "windows-1251",
      labels: ["cp1251", "windows-1251", "x-cp1251"],
    },
    {
      encoding: "windows-1252",
      labels: [
        "ansi_x3.4-1968",
        "ascii",
        "cp1252",
        "cp819",
        "csisolatin1",
        "ibm819",
        "iso-8859-1",
        "iso-ir-100",
        "iso8859-1",
        "iso88591",
        "iso_8859-1",
        "iso_8859-1:1987",
        "l1",
        "latin1",
        "us-ascii",
        "windows-1252",
        "x-cp1252",
      ],
    },
    {
      encoding: "windows-1253",
      labels: ["cp1253", "windows-1253", "x-cp1253"],
    },
    {
      encoding: "windows-1254",
      labels: [
        "cp1254",
        "csisolatin5",
        "iso-8859-9",
        "iso-ir-148",
        "iso8859-9",
        "iso88599",
        "iso_8859-9",
        "iso_8859-9:1989",
        "l5",
        "latin5",
        "windows-1254",
        "x-cp1254",
      ],
    },
    {
      encoding: "windows-1255",
      labels: ["cp1255", "windows-1255", "x-cp1255"],
    },
    {
      encoding: "windows-1256",
      labels: ["cp1256", "windows-1256", "x-cp1256"],
    },
    {
      encoding: "windows-1257",
      labels: ["cp1257", "windows-1257", "x-cp1257"],
    },
    {
      encoding: "windows-1258",
      labels: ["cp1258", "windows-1258", "x-cp1258"],
    },
    {
      encoding: "x-mac-cyrillic",
      labels: ["x-mac-cyrillic", "x-mac-ukrainian"],
    },
    {
      encoding: "gbk",
      labels: [
        "chinese",
        "csgb2312",
        "csiso58gb231280",
        "gb2312",
        "gb_2312",
        "gb_2312-80",
        "gbk",
        "iso-ir-58",
        "x-gbk",
      ],
    },
    { encoding: "gb18030", labels: ["gb18030"] },
    {
      encoding: "big5",
      labels: ["big5", "cn-big5", "csbig5", "x-x-big5", "big5-hkscs"],
    },
    {
      encoding: "euc-jp",
      labels: ["cseucpkdfmtjapanese", "euc-jp", "x-euc-jp"],
    },
    { encoding: "iso-2022-jp", labels: ["csiso2022jp", "iso-2022-jp"] },
    {
      encoding: "shift_jis",
      labels: [
        "csshiftjis",
        "ms932",
        "ms_kanji",
        "shift-jis",
        "shift_jis",
        "sjis",
        "windows-31j",
        "x-sjis",
      ],
    },
    {
      encoding: "euc-kr",
      labels: [
        "cseuckr",
        "csksc56011987",
        "euc-kr",
        "iso-ir-149",
        "korean",
        "ks_c_5601-1987",
        "ks_c_5601-1989",
        "ksc5601",
        "ksc_5601",
        "windows-949",
      ],
    },
    { encoding: "utf-16le", labels: ["utf-16", "utf-16le"] },
    { encoding: "utf-16be", labels: ["utf-16be"] },
    { encoding: "x-user-defined", labels: ["x-user-defined"] },
    {
      error: "RangeError",
      labels: [
        "x-windows-949",
        "\u0130SO-8859-1",
        "csiso2022kr",
        "iso-2022-kr",
        "iso-2022-cn",
        "iso-2022-cn-ext",
        "replacement",
        "hz-gb-2312",
      ],
    },
  ];

  for (var le of labelEncodings) {
    for (var label of le.labels) {
      try {
        var decoder = new TextDecoder(label);
      } catch (e) {
        assert_true(!!le.error, label + " shoud not throw " + e.name);
        assert_equals(
          e.name,
          le.error,
          label + " label encoding unsupported test."
        );
        continue;
      }
      assert_true(!le.error, label + " shoud throw " + le.error);
      assert_equals(
        decoder.encoding,
        le.encoding,
        label + " label encoding test."
      );
    }
  }
}

function testCharset(test) {
  try {
    var fatal = test.fatal ? { fatal: test.fatal } : null;
    var decoder = new TextDecoder(test.encoding, fatal);
  } catch (e) {
    assert_equals(
      e.name,
      test.error,
      test.msg + " error thrown from the constructor."
    );
    if (test.errorMessage) {
      assert_equals(
        e.message,
        test.errorMessage,
        test.msg + " error thrown from the constructor."
      );
    }
    return;
  }

  var array = test.array || [test];
  var num_strings = array.length;
  for (var i = 0; i < num_strings; i++) {
    var decodeView =
      array[i].input !== null ? new Uint8Array(array[i].input) : null;
    var stream = array[i].stream ? { stream: array[i].stream } : null;
    var outText;
    try {
      outText = decoder.decode(decodeView, stream);
    } catch (e) {
      assert_equals(
        e.name,
        array[i].error,
        test.msg + " error thrown from decode()."
      );
      return;
    }

    var expected = array[i].expected;
    if (outText !== expected) {
      assert_equals(
        escape(outText),
        escape(expected),
        test.msg + " Code points do not match expected code points."
      );
      break;
    }
  }
  assert_true(!test.error, test.msg);
}

function testInvalid2022JP() {
  var inputs = [
    [0x80],
    [0x1b, 0xff],
    [0x1b, 0x28, 0xff],
    [0x1b, 0x24, 0x80],
    [0x1b, 0x24, 0x28, 0x80],
    [0x1b, 0x28, 0x4a, 0xff],
    [0x1b, 0x28, 0x49, 0xff],
    [0x1b, 0x24, 0x40, 0x20],
    [0x1b, 0x24, 0x41, 0x20],
    [0x1b, 0x24, 0x42, 0x20],
    [0x1b, 0x24, 0x28, 0x43, 0x20],
    [0x1b, 0x24, 0x28, 0x44, 0x20],
    [0x1b, 0x24, 0x40, 0x80, 0x21],
    [0x1b, 0x24, 0x41, 0xff, 0x21],
    [0x1b, 0x24, 0x42, 0x80, 0x21],
    [0x1b, 0x24, 0x28, 0x43, 0xff, 0x21],
    [0x1b, 0x24, 0x28, 0x44, 0x80, 0x21],
    [0x1b, 0x24, 0x40, 0x21, 0x20],
    [0x1b, 0x24, 0x41, 0x21, 0x20],
    [0x1b, 0x24, 0x42, 0x21, 0x20],
    [0x1b, 0x24, 0x28, 0x43, 0x21, 0x20],
    [0x1b, 0x24, 0x28, 0x44, 0x21, 0x20],
    [0x1b, 0x2e, 0xff],
    [0x1b, 0x4e, 0x20],
    [0x1b, 0x4e, 0x7f],
    [0x1b, 0x2e, 0x41, 0x1b, 0x4e, 0x80],
    [0x1b, 0x2e, 0x41, 0x1b, 0x4e, 0xff],
  ];

  var failureCount = 0;
  inputs.forEach(function (input) {
    try {
      // decode() should never throw unless {fatal: true} is specified
      new TextDecoder("iso-2022-jp").decode(new Uint8Array(input));
    } catch (e) {
      if (e.name !== "TypeError") {
        throw e;
      }
      failureCount++;
    }
  });
  assert_equals(
    failureCount,
    0,
    failureCount + " of " + inputs.length + " tests failed"
  );
}

function testDecoderForBig5() {
  const inputs = [
    [0x61, 0x62],
    [0x87, 0x40],
    [0xfe, 0xfe],
    [0xfe, 0xfd],
    [0x88, 0x62],
    [0x88, 0x64],
    [0x88, 0x66],
    [0x88, 0xa3],
    [0x88, 0xa5],
    [0x88, 0xa7],
    [0x99, 0xd4],
    [0x99, 0xd5],
    [0x99, 0xd6],
    [0x61, 0x87, 0x40, 0x62],
    [0x61, 0xfe, 0xfe, 0x62],
    [0x61, 0xfe, 0xfd, 0x62],
    [0x61, 0x88, 0x62, 0x62],
    [0x61, 0x88, 0x64, 0x62],
    [0x61, 0x88, 0x66, 0x62],
    [0x61, 0x88, 0xa3, 0x62],
    [0x61, 0x88, 0xa5, 0x62],
    [0x61, 0x88, 0xa7, 0x62],
    [0x61, 0x99, 0xd4, 0x62],
    [0x61, 0x99, 0xd5, 0x62],
    [0x61, 0x99, 0xd6, 0x62],
    [0x80, 0x61],
    [0xff, 0x61],
    [0xfe, 0x39],
    [0x87, 0x66],
    [0x81, 0x40],
    [0x61, 0x81],
  ];
  const expectations = [
    "\u0061\u0062",
    "\u43F0",
    "\u79D4",
    "\uD864\uDD0D",
    "\u00CA\u0304",
    "\u00CA\u030C",
    "\u00CA",
    "\u00EA\u0304",
    "\u00EA\u030C",
    "\u00EA",
    "\u8991",
    "\uD85E\uDD67",
    "\u8A29",
    "\u0061\u43F0\u0062",
    "\u0061\u79D4\u0062",
    "\u0061\uD864\uDD0D\u0062",
    "\u0061\u00CA\u0304\u0062",
    "\u0061\u00CA\u030C\u0062",
    "\u0061\u00CA\u0062",
    "\u0061\u00EA\u0304\u0062",
    "\u0061\u00EA\u030C\u0062",
    "\u0061\u00EA\u0062",
    "\u0061\u8991\u0062",
    "\u0061\uD85E\uDD67\u0062",
    "\u0061\u8A29\u0062",
    "\uFFFD\u0061",
    "\uFFFD\u0061",
    "\uFFFD\u0039",
    "\uFFFD\u0066",
    "\uFFFD\u0040",
    "\u0061\uFFFD",
  ];

  for (var i = 0; i < inputs.length; i++) {
    testCharset({
      encoding: "big5",
      input: inputs[i],
      expected: expectations[i],
      msg: "decoder test #" + i + " for big5.",
    });
  }
}