| // META: global=window,worker |
| // META: script=pako/pako_inflate.min.js |
| // META: timeout=long |
| |
| 'use strict'; |
| |
| // This test asserts that compressing '' doesn't affect the compressed data. |
| // Example: compressing ['Hello', '', 'Hello'] results in 'HelloHello' |
| |
| async function compressChunkList(chunkList, format) { |
| const cs = new CompressionStream(format); |
| const writer = cs.writable.getWriter(); |
| for (const chunk of chunkList) { |
| const chunkByte = new TextEncoder().encode(chunk); |
| writer.write(chunkByte); |
| } |
| 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 chunkLists = [ |
| ['', 'Hello', 'Hello'], |
| ['Hello', '', 'Hello'], |
| ['Hello', 'Hello', ''] |
| ]; |
| const expectedValue = new TextEncoder().encode('HelloHello'); |
| |
| for (const chunkList of chunkLists) { |
| promise_test(async t => { |
| const compressedData = await compressChunkList(chunkList, 'deflate'); |
| // 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'); |
| }, `the result of compressing [${chunkList}] with deflate should be 'HelloHello'`); |
| |
| promise_test(async t => { |
| const compressedData = await compressChunkList(chunkList, 'gzip'); |
| // decompress with pako, and check that we got the same result as our original string |
| assert_array_equals(expectedValue, pako.inflate(compressedData), 'value should match'); |
| }, `the result of compressing [${chunkList}] with gzip should be 'HelloHello'`); |
| } |