| // META: global=window,worker |
| // META: script=third_party/pako/pako_inflate.min.js |
| // META: timeout=long |
| |
| 'use strict'; |
| |
| // This test asserts that compressing multiple chunks should work. |
| |
| // Example: ('Hello', 3) => TextEncoder().encode('HelloHelloHello') |
| function makeExpectedChunk(input, numberOfChunks) { |
| const expectedChunk = input.repeat(numberOfChunks); |
| return new TextEncoder().encode(expectedChunk); |
| } |
| |
| // Example: ('Hello', 3, 'deflate') => compress ['Hello', 'Hello', Hello'] |
| async function compressMultipleChunks(input, numberOfChunks, format) { |
| const cs = new CompressionStream(format); |
| const writer = cs.writable.getWriter(); |
| const chunk = new TextEncoder().encode(input); |
| for (let i = 0; i < numberOfChunks; ++i) { |
| writer.write(chunk); |
| } |
| const closePromise = writer.close(); |
| const out = []; |
| const reader = cs.readable.getReader(); |
| let totalSize = 0; |
| while (true) { |
| const { value, done } = await reader.read(); |
| if (done) |
| break; |
| out.push(value); |
| totalSize += value.byteLength; |
| } |
| await closePromise; |
| const concatenated = new Uint8Array(totalSize); |
| let offset = 0; |
| for (const array of out) { |
| concatenated.set(array, offset); |
| offset += array.byteLength; |
| } |
| return concatenated; |
| } |
| |
| const hello = 'Hello'; |
| |
| for (let numberOfChunks = 2; numberOfChunks <= 16; ++numberOfChunks) { |
| promise_test(async t => { |
| const compressedData = await compressMultipleChunks(hello, numberOfChunks, 'deflate'); |
| const expectedValue = makeExpectedChunk(hello, numberOfChunks); |
| // decompress with pako, and check that we got the same result as our original string |
| assert_array_equals(expectedValue, pako.inflate(compressedData), 'value should match'); |
| }, `compressing ${numberOfChunks} chunks with deflate should work`); |
| |
| promise_test(async t => { |
| const compressedData = await compressMultipleChunks(hello, numberOfChunks, 'gzip'); |
| const expectedValue = makeExpectedChunk(hello, numberOfChunks); |
| // decompress with pako, and check that we got the same result as our original string |
| assert_array_equals(expectedValue, pako.inflate(compressedData), 'value should match'); |
| }, `compressing ${numberOfChunks} chunks with gzip should work`); |
| |
| promise_test(async t => { |
| const compressedData = await compressMultipleChunks(hello, numberOfChunks, 'deflate-raw'); |
| const expectedValue = makeExpectedChunk(hello, numberOfChunks); |
| // decompress with pako, and check that we got the same result as our original string |
| assert_array_equals(expectedValue, pako.inflateRaw(compressedData), 'value should match'); |
| }, `compressing ${numberOfChunks} chunks with deflate-raw should work`); |
| } |