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// META: global=window,worker
const EXPECTED_SIZE = 27000000;
const EXPECTED_SHA256 = [
74, 100, 37, 243, 147, 61, 116, 60, 241, 221, 126,
18, 24, 71, 204, 28, 50, 62, 201, 130, 152, 225,
217, 183, 10, 201, 143, 214, 102, 155, 212, 248,
];
promise_test(async () => {
const response = await fetch('resources/big.text.gz');
assert_true(response.ok);
const arrayBuffer = await response.arrayBuffer();
assert_equals(arrayBuffer.byteLength, EXPECTED_SIZE,
'uncompressed size should match');
const sha256 = await crypto.subtle.digest('SHA-256', arrayBuffer);
assert_array_equals(new Uint8Array(sha256), EXPECTED_SHA256,
'digest should match');
}, 'large gzip data should be decompressed successfully');
promise_test(async () => {
const response = await fetch('resources/big.text.gz');
assert_true(response.ok);
const reader = response.body.getReader({mode: 'byob'});
let offset = 0;
// Pre-allocate space for the output. The response body will be read
// chunk-by-chunk into this array.
let ab = new ArrayBuffer(EXPECTED_SIZE);
while (offset < EXPECTED_SIZE) {
// To stress the data pipe, we want to use a different size read each
// time. Unfortunately, JavaScript doesn't have a seeded random number
// generator, so this creates the possibility of making this test flaky if
// it doesn't work for some edge cases.
let size = Math.floor(Math.random() * 65535 + 1);
if (size + offset > EXPECTED_SIZE) {
size = EXPECTED_SIZE - offset;
}
const u8 = new Uint8Array(ab, offset, size);
const { value, done } = await reader.read(u8);
ab = value.buffer;
// Check that we got our original array back.
assert_equals(ab.byteLength, EXPECTED_SIZE,
'backing array should be the same size');
assert_equals(offset, value.byteOffset, 'offset should match');
assert_less_than_equal(value.byteLength, size,
'we should not have got more than we asked for');
offset = value.byteOffset + value.byteLength;
if (done) break;
}
assert_equals(offset, EXPECTED_SIZE,
'we should have read the whole thing');
const sha256 = await crypto.subtle.digest('SHA-256', new Uint8Array(ab));
assert_array_equals(new Uint8Array(sha256), EXPECTED_SHA256,
'digest should match');
}, 'large gzip data should be decompressed successfully with byte stream');
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