38 lines
1.7 KiB
JavaScript
38 lines
1.7 KiB
JavaScript
// META: global=window,worker
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// META: script=resources/readable-stream-from-array.js
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// META: script=resources/readable-stream-to-array.js
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const cases = [
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{encoding: 'utf-8', bytes: [0xEF, 0xBB, 0xBF, 0x61, 0x62, 0x63]},
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{encoding: 'utf-16le', bytes: [0xFF, 0xFE, 0x61, 0x00, 0x62, 0x00, 0x63, 0x00]},
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{encoding: 'utf-16be', bytes: [0xFE, 0xFF, 0x00, 0x61, 0x00, 0x62, 0x00, 0x63]}
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];
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const BOM = '\uFEFF';
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// |inputChunks| is an array of chunks, each represented by an array of
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// integers. |ignoreBOM| is true or false. The result value is the output of the
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// pipe, concatenated into a single string.
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async function pipeAndAssemble(inputChunks, encoding, ignoreBOM) {
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const chunksAsUint8 = inputChunks.map(values => new Uint8Array(values));
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const readable = readableStreamFromArray(chunksAsUint8);
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const outputArray = await readableStreamToArray(readable.pipeThrough(
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new TextDecoderStream(encoding, {ignoreBOM})));
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return outputArray.join('');
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}
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for (const testCase of cases) {
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for (let splitPoint = 0; splitPoint < 4; ++splitPoint) {
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promise_test(async () => {
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const inputChunks = [testCase.bytes.slice(0, splitPoint),
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testCase.bytes.slice(splitPoint)];
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const withIgnoreBOM =
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await pipeAndAssemble(inputChunks, testCase.encoding, true);
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assert_equals(withIgnoreBOM, BOM + 'abc', 'BOM should be preserved');
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const withoutIgnoreBOM =
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await pipeAndAssemble(inputChunks, testCase.encoding, false);
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assert_equals(withoutIgnoreBOM, 'abc', 'BOM should be stripped')
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}, `ignoreBOM should work for encoding ${testCase.encoding}, split at ` +
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`character ${splitPoint}`);
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}
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}
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