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Test Info:
- Manifest: dom/encoding/test/unit/xpcshell.toml
// NOTE: Requires testharness.js
test(function () {
var badStrings = [
{ input: "\ud800", expected: "\ufffd" }, // Surrogate half
{ input: "\udc00", expected: "\ufffd" }, // Surrogate half
{ input: "abc\ud800def", expected: "abc\ufffddef" }, // Surrogate half
{ input: "abc\udc00def", expected: "abc\ufffddef" }, // Surrogate half
{ input: "\udc00\ud800", expected: "\ufffd\ufffd" }, // Wrong order
];
badStrings.forEach(function (t) {
var encoded = new TextEncoder().encode(t.input);
var decoded = new TextDecoder("utf-8").decode(encoded);
assert_equals(t.expected, decoded);
});
}, "bad data");
test(function () {
var bad = [
{ encoding: "utf-8", input: [0xc0] }, // ends early
{ encoding: "utf-8", input: [0xc0, 0x00] }, // invalid trail
{ encoding: "utf-8", input: [0xc0, 0xc0] }, // invalid trail
{ encoding: "utf-8", input: [0xe0] }, // ends early
{ encoding: "utf-8", input: [0xe0, 0x00] }, // invalid trail
{ encoding: "utf-8", input: [0xe0, 0xc0] }, // invalid trail
{ encoding: "utf-8", input: [0xe0, 0x80, 0x00] }, // invalid trail
{ encoding: "utf-8", input: [0xe0, 0x80, 0xc0] }, // invalid trail
{ encoding: "utf-8", input: [0xfc, 0x80, 0x80, 0x80, 0x80, 0x80] }, // > 0x10FFFF
{ encoding: "utf-16le", input: [0x00] }, // truncated code unit
{ encoding: "utf-16le", input: [0x00, 0xd8] }, // surrogate half
{ encoding: "utf-16le", input: [0x00, 0xd8, 0x00, 0x00] }, // surrogate half
{ encoding: "utf-16le", input: [0x00, 0xdc, 0x00, 0x00] }, // trail surrogate
{ encoding: "utf-16le", input: [0x00, 0xdc, 0x00, 0xd8] }, // swapped surrogates
// TODO: Single byte encoding cases
];
bad.forEach(function (t) {
assert_throws({ name: "TypeError" }, function () {
new TextDecoder(t.encoding, { fatal: true }).decode(
new Uint8Array(t.input)
);
});
});
}, "fatal flag");
test(function () {
var encodings = [
{ label: "utf-8", encoding: "utf-8" },
{ label: "utf-16", encoding: "utf-16le" },
{ label: "utf-16le", encoding: "utf-16le" },
{ label: "utf-16be", encoding: "utf-16be" },
{ label: "ascii", encoding: "windows-1252" },
{ label: "iso-8859-1", encoding: "windows-1252" },
];
encodings.forEach(function (test) {
assert_equals(
new TextDecoder(test.label.toLowerCase()).encoding,
test.encoding
);
assert_equals(
new TextDecoder(test.label.toUpperCase()).encoding,
test.encoding
);
});
}, "Encoding names are case insensitive");
test(function () {
var utf8_bom = [0xef, 0xbb, 0xbf];
var utf8 = [
0x7a, 0xc2, 0xa2, 0xe6, 0xb0, 0xb4, 0xf0, 0x9d, 0x84, 0x9e, 0xf4, 0x8f,
0xbf, 0xbd,
];
var utf16le_bom = [0xff, 0xfe];
var utf16le = [
0x7a, 0x00, 0xa2, 0x00, 0x34, 0x6c, 0x34, 0xd8, 0x1e, 0xdd, 0xff, 0xdb,
0xfd, 0xdf,
];
var utf16be_bom = [0xfe, 0xff];
var utf16be = [
0x00, 0x7a, 0x00, 0xa2, 0x6c, 0x34, 0xd8, 0x34, 0xdd, 0x1e, 0xdb, 0xff,
0xdf, 0xfd,
];
var string = "z\xA2\u6C34\uD834\uDD1E\uDBFF\uDFFD"; // z, cent, CJK water, G-Clef, Private-use character
// missing BOMs
assert_equals(new TextDecoder("utf-8").decode(new Uint8Array(utf8)), string);
assert_equals(
new TextDecoder("utf-16le").decode(new Uint8Array(utf16le)),
string
);
assert_equals(
new TextDecoder("utf-16be").decode(new Uint8Array(utf16be)),
string
);
// matching BOMs
assert_equals(
new TextDecoder("utf-8").decode(new Uint8Array(utf8_bom.concat(utf8))),
string
);
assert_equals(
new TextDecoder("utf-16le").decode(
new Uint8Array(utf16le_bom.concat(utf16le))
),
string
);
assert_equals(
new TextDecoder("utf-16be").decode(
new Uint8Array(utf16be_bom.concat(utf16be))
),
string
);
// matching BOMs split
var decoder8 = new TextDecoder("utf-8");
assert_equals(
decoder8.decode(new Uint8Array(utf8_bom.slice(0, 1)), { stream: true }),
""
);
assert_equals(
decoder8.decode(new Uint8Array(utf8_bom.slice(1).concat(utf8))),
string
);
assert_equals(
decoder8.decode(new Uint8Array(utf8_bom.slice(0, 2)), { stream: true }),
""
);
assert_equals(
decoder8.decode(new Uint8Array(utf8_bom.slice(2).concat(utf8))),
string
);
var decoder16le = new TextDecoder("utf-16le");
assert_equals(
decoder16le.decode(new Uint8Array(utf16le_bom.slice(0, 1)), {
stream: true,
}),
""
);
assert_equals(
decoder16le.decode(new Uint8Array(utf16le_bom.slice(1).concat(utf16le))),
string
);
var decoder16be = new TextDecoder("utf-16be");
assert_equals(
decoder16be.decode(new Uint8Array(utf16be_bom.slice(0, 1)), {
stream: true,
}),
""
);
assert_equals(
decoder16be.decode(new Uint8Array(utf16be_bom.slice(1).concat(utf16be))),
string
);
// mismatching BOMs
assert_not_equals(
new TextDecoder("utf-8").decode(new Uint8Array(utf16le_bom.concat(utf8))),
string
);
assert_not_equals(
new TextDecoder("utf-8").decode(new Uint8Array(utf16be_bom.concat(utf8))),
string
);
assert_not_equals(
new TextDecoder("utf-16le").decode(
new Uint8Array(utf8_bom.concat(utf16le))
),
string
);
assert_not_equals(
new TextDecoder("utf-16le").decode(
new Uint8Array(utf16be_bom.concat(utf16le))
),
string
);
assert_not_equals(
new TextDecoder("utf-16be").decode(
new Uint8Array(utf8_bom.concat(utf16be))
),
string
);
assert_not_equals(
new TextDecoder("utf-16be").decode(
new Uint8Array(utf16le_bom.concat(utf16be))
),
string
);
}, "Byte-order marks");
test(function () {
assert_equals(new TextDecoder("utf-8").encoding, "utf-8"); // canonical case
assert_equals(new TextDecoder("UTF-16").encoding, "utf-16le"); // canonical case and name
assert_equals(new TextDecoder("UTF-16BE").encoding, "utf-16be"); // canonical case and name
assert_equals(new TextDecoder("iso8859-1").encoding, "windows-1252"); // canonical case and name
assert_equals(new TextDecoder("iso-8859-1").encoding, "windows-1252"); // canonical case and name
}, "Encoding names");
test(function () {
["utf-8", "utf-16le", "utf-16be"].forEach(function (encoding) {
var string =
"\x00123ABCabc\x80\xFF\u0100\u1000\uFFFD\uD800\uDC00\uDBFF\uDFFF";
var octets = {
"utf-16le": [
0x00, 0x00, 0x31, 0x00, 0x32, 0x00, 0x33, 0x00, 0x41, 0x00, 0x42, 0x00,
0x43, 0x00, 0x61, 0x00, 0x62, 0x00, 0x63, 0x00, 0x80, 0x00, 0xff, 0x00,
0x00, 0x01, 0x00, 0x10, 0xfd, 0xff, 0x00, 0xd8, 0x00, 0xdc, 0xff, 0xdb,
0xff, 0xdf,
],
"utf-16be": [
0x00, 0x00, 0x00, 0x31, 0x00, 0x32, 0x00, 0x33, 0x00, 0x41, 0x00, 0x42,
0x00, 0x43, 0x00, 0x61, 0x00, 0x62, 0x00, 0x63, 0x00, 0x80, 0x00, 0xff,
0x01, 0x00, 0x10, 0x00, 0xff, 0xfd, 0xd8, 0x00, 0xdc, 0x00, 0xdb, 0xff,
0xdf, 0xff,
],
};
var encoded = octets[encoding] || new TextEncoder().encode(string);
for (var len = 1; len <= 5; ++len) {
var out = "",
decoder = new TextDecoder(encoding);
for (var i = 0; i < encoded.length; i += len) {
var sub = [];
for (var j = i; j < encoded.length && j < i + len; ++j) {
sub.push(encoded[j]);
}
out += decoder.decode(new Uint8Array(sub), { stream: true });
}
out += decoder.decode();
assert_equals(out, string, "streaming decode " + encoding);
}
});
}, "Streaming Decode");
test(function () {
var jis = [0x82, 0xc9, 0x82, 0xd9, 0x82, 0xf1];
var expected = "\u306B\u307B\u3093"; // Nihon
assert_equals(
new TextDecoder("shift_jis").decode(new Uint8Array(jis)),
expected
);
}, "Shift_JIS Decode");
test(function () {
var encodings = [
"utf-8",
"ibm866",
"iso-8859-2",
"iso-8859-3",
"iso-8859-4",
"iso-8859-5",
"iso-8859-6",
"iso-8859-7",
"iso-8859-8",
"iso-8859-8-i",
"iso-8859-10",
"iso-8859-13",
"iso-8859-14",
"iso-8859-15",
"iso-8859-16",
"koi8-r",
"koi8-u",
"macintosh",
"windows-874",
"windows-1250",
"windows-1251",
"windows-1252",
"windows-1253",
"windows-1254",
"windows-1255",
"windows-1256",
"windows-1257",
"windows-1258",
"x-mac-cyrillic",
"gbk",
"gb18030",
"big5",
"euc-jp",
"iso-2022-jp",
"shift_jis",
"euc-kr",
"x-user-defined",
];
encodings.forEach(function (encoding) {
var string = "",
bytes = [];
for (var i = 0; i < 128; ++i) {
// Encodings that have escape codes in 0x00-0x7F
if (
encoding === "iso-2022-jp" &&
(i === 0x1b || i === 0xe || i === 0xf)
) {
continue;
}
string += String.fromCharCode(i);
bytes.push(i);
}
var ascii_encoded = new TextEncoder().encode(string);
assert_equals(
new TextDecoder(encoding).decode(ascii_encoded),
string,
encoding
);
//assert_array_equals(new TextEncoder().encode(string), bytes, encoding);
});
}, "Supersets of ASCII decode ASCII correctly");
test(function () {
assert_throws({ name: "TypeError" }, function () {
new TextDecoder("utf-8", { fatal: true }).decode(new Uint8Array([0xff]));
});
// This should not hang:
new TextDecoder("utf-8").decode(new Uint8Array([0xff]));
assert_throws({ name: "TypeError" }, function () {
new TextDecoder("utf-16", { fatal: true }).decode(new Uint8Array([0x00]));
});
// This should not hang:
new TextDecoder("utf-16").decode(new Uint8Array([0x00]));
assert_throws({ name: "TypeError" }, function () {
new TextDecoder("utf-16be", { fatal: true }).decode(new Uint8Array([0x00]));
});
// This should not hang:
new TextDecoder("utf-16be").decode(new Uint8Array([0x00]));
}, "Non-fatal errors at EOF");
test(function () {
var encodings = [
"utf-8",
"ibm866",
"iso-8859-2",
"iso-8859-3",
"iso-8859-4",
"iso-8859-5",
"iso-8859-6",
"iso-8859-7",
"iso-8859-8",
"iso-8859-8-i",
"iso-8859-10",
"iso-8859-13",
"iso-8859-14",
"iso-8859-15",
"iso-8859-16",
"koi8-r",
"koi8-u",
"macintosh",
"windows-874",
"windows-1250",
"windows-1251",
"windows-1252",
"windows-1253",
"windows-1254",
"windows-1255",
"windows-1256",
"windows-1257",
"windows-1258",
"x-mac-cyrillic",
"gbk",
"gb18030",
"big5",
"euc-jp",
"iso-2022-jp",
"shift_jis",
"euc-kr",
"x-user-defined",
"utf-16le",
"utf-16be",
];
encodings.forEach(function (encoding) {
assert_equals(new TextDecoder(encoding).encoding, encoding);
assert_equals(new TextEncoder(encoding).encoding, "utf-8");
});
}, "Non-UTF-8 encodings supported only for decode, not encode");