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This patch introduces a DecompressionStreamAlgorithms abstract base class, which is implemented by ZLibDecompressionStreamAlgorithms and ZstdDecompressionStreamAlgorithms. It also introduces a new static pref for the "zstd" format to be used with CompressionStream and DecompressionStream, and introduces new WPTs for zstd DecompressionStream with equivalent coverage to those for ZLib. Differential Revision: https://phabricator.services.mozilla.com/D238685
31 lines
906 B
JavaScript
31 lines
906 B
JavaScript
// META: global=window,worker
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"use strict";
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// The zstd-compressed bytes for an empty string "".
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const compressedZstdBytes = new Uint8Array([
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0x28, 0xb5, 0x2f, 0xfd, 0x24, 0x00, 0x01, 0x00, 0x00, 0x99, 0xe9, 0xd8, 0x51,
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]);
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promise_test(async t => {
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const ds = new DecompressionStream("zstd");
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const writer = ds.writable.getWriter();
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const reader = ds.readable.getReader();
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const writePromise = writer.write(compressedZstdBytes);
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const writerClosePromise = writer.close();
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const { value, done } = await reader.read();
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assert_true(done, "The done flag should be set after reading empty input");
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await writePromise;
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await writerClosePromise;
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const decompressedText = new TextDecoder().decode(value);
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assert_equals(
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decompressedText,
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"",
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"The decompressed text should match the expected text"
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);
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}, "decompressing empty zstd input should yield an empty string");
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