decompression-empty-input.tentative.any.js

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This WPT test may be referenced by the following Test IDs:
- /compression/zstd/decompression-empty-input.tentative.any.html - WPT Dashboard Interop Dashboard
- /compression/zstd/decompression-empty-input.tentative.any.serviceworker.html - WPT Dashboard Interop Dashboard
- /compression/zstd/decompression-empty-input.tentative.any.sharedworker.html - WPT Dashboard Interop Dashboard
- /compression/zstd/decompression-empty-input.tentative.any.worker.html - WPT Dashboard Interop Dashboard

// META: global=window,worker

"use strict";

// The zstd-compressed bytes for an empty string "".

const compressedZstdBytes = new Uint8Array([

  0x28, 0xb5, 0x2f, 0xfd, 0x24, 0x00, 0x01, 0x00, 0x00, 0x99, 0xe9, 0xd8, 0x51,

]);

promise_test(async t => {

  const ds = new DecompressionStream("zstd");

  const writer = ds.writable.getWriter();

  const reader = ds.readable.getReader();

  const writePromise = writer.write(compressedZstdBytes);

  const writerClosePromise = writer.close();

  const { value, done } = await reader.read();

  assert_true(done, "The done flag should be set after reading empty input");

  await writePromise;

  await writerClosePromise;

  const decompressedText = new TextDecoder().decode(value);

  assert_equals(

    decompressedText,

"",

    "The decompressed text should match the expected text"

);

}, "decompressing empty zstd input should yield an empty string");