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// Flags: --expose-internals
'use strict';
const common = require('../common');
const assert = require('assert');
const { customInspectSymbol: inspect } = require('internal/util');
const buf = Buffer.from([0xef, 0xbb, 0xbf, 0x74, 0x65,
0x73, 0x74, 0xe2, 0x82, 0xac]);
// Make Sure TextDecoder exist
assert(TextDecoder);
// Test TextDecoder, UTF-8, fatal: false, ignoreBOM: false
{
['unicode-1-1-utf-8', 'utf8', 'utf-8'].forEach((i) => {
const dec = new TextDecoder(i);
assert.strictEqual(dec.encoding, 'utf-8');
const res = dec.decode(buf);
assert.strictEqual(res, 'test€');
});
['unicode-1-1-utf-8', 'utf8', 'utf-8'].forEach((i) => {
const dec = new TextDecoder(i);
let res = '';
res += dec.decode(buf.slice(0, 8), { stream: true });
res += dec.decode(buf.slice(8));
assert.strictEqual(res, 'test€');
});
}
// Test TextDecoder, UTF-8, fatal: false, ignoreBOM: true
{
['unicode-1-1-utf-8', 'utf8', 'utf-8'].forEach((i) => {
const dec = new TextDecoder(i, { ignoreBOM: true });
const res = dec.decode(buf);
assert.strictEqual(res, '\ufefftest€');
});
['unicode-1-1-utf-8', 'utf8', 'utf-8'].forEach((i) => {
const dec = new TextDecoder(i, { ignoreBOM: true });
let res = '';
res += dec.decode(buf.slice(0, 8), { stream: true });
res += dec.decode(buf.slice(8));
assert.strictEqual(res, '\ufefftest€');
});
}
// Test TextDecoder, UTF-8, fatal: true, ignoreBOM: false
if (common.hasIntl) {
['unicode-1-1-utf-8', 'utf8', 'utf-8'].forEach((i) => {
const dec = new TextDecoder(i, { fatal: true });
common.expectsError(() => dec.decode(buf.slice(0, 8)),
{
code: 'ERR_ENCODING_INVALID_ENCODED_DATA',
type: TypeError,
message: 'The encoded data was not valid ' +
'for encoding utf-8'
});
});
['unicode-1-1-utf-8', 'utf8', 'utf-8'].forEach((i) => {
const dec = new TextDecoder(i, { fatal: true });
dec.decode(buf.slice(0, 8), { stream: true });
dec.decode(buf.slice(8));
});
} else {
common.expectsError(
() => new TextDecoder('utf-8', { fatal: true }),
{
code: 'ERR_NO_ICU',
type: TypeError,
message: '"fatal" option is not supported on Node.js compiled without ICU'
});
}
// Test TextDecoder, UTF-16le
{
const dec = new TextDecoder('utf-16le');
const res = dec.decode(Buffer.from('test€', 'utf-16le'));
assert.strictEqual(res, 'test€');
}
// Test TextDecoder, UTF-16be
if (common.hasIntl) {
const dec = new TextDecoder('utf-16be');
const res = dec.decode(Buffer.from('test€', 'utf-16le').swap16());
assert.strictEqual(res, 'test€');
}
{
const inspectFn = TextDecoder.prototype[inspect];
const decodeFn = TextDecoder.prototype.decode;
const {
encoding: { get: encodingGetter },
fatal: { get: fatalGetter },
ignoreBOM: { get: ignoreBOMGetter },
} = Object.getOwnPropertyDescriptors(TextDecoder.prototype);
const instance = new TextDecoder();
const expectedError = {
code: 'ERR_INVALID_THIS',
type: TypeError,
message: 'Value of "this" must be of type TextDecoder'
};
inspectFn.call(instance, Infinity, {});
decodeFn.call(instance);
encodingGetter.call(instance);
fatalGetter.call(instance);
ignoreBOMGetter.call(instance);
const invalidThisArgs = [{}, [], true, 1, '', new TextEncoder()];
invalidThisArgs.forEach((i) => {
common.expectsError(() => inspectFn.call(i, Infinity, {}), expectedError);
common.expectsError(() => decodeFn.call(i), expectedError);
common.expectsError(() => encodingGetter.call(i), expectedError);
common.expectsError(() => fatalGetter.call(i), expectedError);
common.expectsError(() => ignoreBOMGetter.call(i), expectedError);
});
}
// From: https://github.com/w3c/web-platform-tests/blob/master/encoding/api-basics.html
function testDecodeSample(encoding, string, bytes) {
assert.strictEqual(
new TextDecoder(encoding).decode(new Uint8Array(bytes)),
string);
assert.strictEqual(
new TextDecoder(encoding).decode(new Uint8Array(bytes).buffer),
string);
}
// z (ASCII U+007A), cent (Latin-1 U+00A2), CJK water (BMP U+6C34),
// G-Clef (non-BMP U+1D11E), PUA (BMP U+F8FF), PUA (non-BMP U+10FFFD)
// byte-swapped BOM (non-character U+FFFE)
const sample = 'z\xA2\u6C34\uD834\uDD1E\uF8FF\uDBFF\uDFFD\uFFFE';
{
const encoding = 'utf-8';
const string = sample;
const bytes = [
0x7A, 0xC2, 0xA2, 0xE6, 0xB0, 0xB4,
0xF0, 0x9D, 0x84, 0x9E, 0xEF, 0xA3,
0xBF, 0xF4, 0x8F, 0xBF, 0xBD, 0xEF,
0xBF, 0xBE
];
const encoded = new TextEncoder().encode(string);
assert.deepStrictEqual([].slice.call(encoded), bytes);
assert.strictEqual(
new TextDecoder(encoding).decode(new Uint8Array(bytes)),
string);
assert.strictEqual(
new TextDecoder(encoding).decode(new Uint8Array(bytes).buffer),
string);
}
testDecodeSample(
'utf-16le',
sample,
[
0x7A, 0x00, 0xA2, 0x00, 0x34, 0x6C,
0x34, 0xD8, 0x1E, 0xDD, 0xFF, 0xF8,
0xFF, 0xDB, 0xFD, 0xDF, 0xFE, 0xFF
]
);
if (common.hasIntl) {
testDecodeSample(
'utf-16be',
sample,
[
0x00, 0x7A, 0x00, 0xA2, 0x6C, 0x34,
0xD8, 0x34, 0xDD, 0x1E, 0xF8, 0xFF,
0xDB, 0xFF, 0xDF, 0xFD, 0xFF, 0xFE
]
);
}
testDecodeSample(
'utf-16',
sample,
[
0x7A, 0x00, 0xA2, 0x00, 0x34, 0x6C,
0x34, 0xD8, 0x1E, 0xDD, 0xFF, 0xF8,
0xFF, 0xDB, 0xFD, 0xDF, 0xFE, 0xFF
]
);
// From: https://github.com/w3c/web-platform-tests/blob/master/encoding/api-invalid-label.html
[
'utf-8',
'unicode-1-1-utf-8',
'utf8',
'utf-16be',
'utf-16le',
'utf-16'
].forEach((i) => {
['\u0000', '\u000b', '\u00a0', '\u2028', '\u2029'].forEach((ws) => {
common.expectsError(
() => new TextDecoder(`${ws}${i}`),
{
code: 'ERR_ENCODING_NOT_SUPPORTED',
type: RangeError
}
);
common.expectsError(
() => new TextDecoder(`${i}${ws}`),
{
code: 'ERR_ENCODING_NOT_SUPPORTED',
type: RangeError
}
);
common.expectsError(
() => new TextDecoder(`${ws}${i}${ws}`),
{
code: 'ERR_ENCODING_NOT_SUPPORTED',
type: RangeError
}
);
});
});
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