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// META: global=window,worker
// META: script=resources/readable-stream-from-array.js
// META: script=resources/readable-stream-to-array.js
'use strict';
const inputBytes = [73, 32, 240, 159, 146, 153, 32, 115, 116, 114, 101,
97, 109, 115];
for (const splitPoint of [2, 3, 4, 5]) {
promise_test(async () => {
const input = readableStreamFromArray(
[new Uint8Array(inputBytes.slice(0, splitPoint)),
new Uint8Array(inputBytes.slice(splitPoint))]);
const expectedOutput = ['I ', '\u{1F499} streams'];
const output = input.pipeThrough(new TextDecoderStream());
const array = await readableStreamToArray(output);
assert_array_equals(array, expectedOutput,
'the split code point should be in the second chunk ' +
'of the output');
}, 'a code point split between chunks should not be emitted until all ' +
'bytes are available; split point = ' + splitPoint);
}
promise_test(async () => {
const splitPoint = 6;
const input = readableStreamFromArray(
[new Uint8Array(inputBytes.slice(0, splitPoint)),
new Uint8Array(inputBytes.slice(splitPoint))]);
const output = input.pipeThrough(new TextDecoderStream());
const array = await readableStreamToArray(output);
assert_array_equals(array, ['I \u{1F499}', ' streams'],
'the multibyte character should be in the first chunk ' +
'of the output');
}, 'a code point should be emitted as soon as all bytes are available');
for (let splitPoint = 1; splitPoint < 7; ++splitPoint) {
promise_test(async () => {
const input = readableStreamFromArray(
[new Uint8Array(inputBytes.slice(0, splitPoint)),
new Uint8Array([]),
new Uint8Array(inputBytes.slice(splitPoint))]);
const concatenatedOutput = 'I \u{1F499} streams';
const output = input.pipeThrough(new TextDecoderStream());
const array = await readableStreamToArray(output);
assert_equals(array.length, 2, 'two chunks should be output');
assert_equals(array[0].concat(array[1]), concatenatedOutput,
'output should be unchanged by the empty chunk');
}, 'an empty chunk inside a code point split between chunks should not ' +
'change the output; split point = ' + splitPoint);
}
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