| // META: global=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); |
| } |