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// META: global=window,worker,shadowrealm
// META: script=third_party/pako/pako_inflate.min.js
// META: timeout=long
'use strict';
const SMALL_FILE = "/media/foo.vtt";
const LARGE_FILE = "/media/test-av-384k-44100Hz-1ch-320x240-30fps-10kfr.webm";
async function compressArrayBuffer(input, format) {
const cs = new CompressionStream(format);
const writer = cs.writable.getWriter();
writer.write(input);
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;
}
test(() => {
assert_throws_js(TypeError, () => {
const transformer = new CompressionStream("nonvalid");
}, "non supported format should throw");
}, "CompressionStream constructor should throw on invalid format");
promise_test(async () => {
const buffer = new ArrayBuffer(0);
const bufferView = new Uint8Array(buffer);
const compressedData = await compressArrayBuffer(bufferView, "deflate");
// decompress with pako, and check that we got the same result as our original string
assert_array_equals(bufferView, pako.inflate(compressedData));
}, "deflated empty data should be reinflated back to its origin");
promise_test(async () => {
const response = await fetch(SMALL_FILE)
const buffer = await response.arrayBuffer();
const bufferView = new Uint8Array(buffer);
const compressedData = await compressArrayBuffer(bufferView, "deflate");
// decompress with pako, and check that we got the same result as our original string
assert_array_equals(bufferView, pako.inflate(compressedData));
}, "deflated small amount data should be reinflated back to its origin");
promise_test(async () => {
const response = await fetch(LARGE_FILE)
const buffer = await response.arrayBuffer();
const bufferView = new Uint8Array(buffer);
const compressedData = await compressArrayBuffer(bufferView, "deflate");
// decompress with pako, and check that we got the same result as our original string
assert_array_equals(bufferView, pako.inflate(compressedData));
}, "deflated large amount data should be reinflated back to its origin");
promise_test(async () => {
const buffer = new ArrayBuffer(0);
const bufferView = new Uint8Array(buffer);
const compressedData = await compressArrayBuffer(bufferView, "gzip");
// decompress with pako, and check that we got the same result as our original string
assert_array_equals(bufferView, pako.inflate(compressedData));
}, "gzipped empty data should be reinflated back to its origin");
promise_test(async () => {
const response = await fetch(SMALL_FILE)
const buffer = await response.arrayBuffer();
const bufferView = new Uint8Array(buffer);
const compressedData = await compressArrayBuffer(bufferView, "gzip");
// decompress with pako, and check that we got the same result as our original string
assert_array_equals(bufferView, pako.inflate(compressedData));
}, "gzipped small amount data should be reinflated back to its origin");
promise_test(async () => {
const response = await fetch(LARGE_FILE)
const buffer = await response.arrayBuffer();
const bufferView = new Uint8Array(buffer);
const compressedData = await compressArrayBuffer(bufferView, "gzip");
// decompress with pako, and check that we got the same result as our original string
assert_array_equals(bufferView, pako.inflate(compressedData));
}, "gzipped large amount data should be reinflated back to its origin");
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