cobalt/black_box_tests/testdata/worker_post_message_test.html

<!DOCTYPE html>
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  Copyright 2023 The Cobalt Authors. All Rights Reserved.

  Licensed under the Apache License, Version 2.0 (the "License");
  you may not use this file except in compliance with the License.
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      http://www.apache.org/licenses/LICENSE-2.0

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  See the License for the specific language governing permissions and
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-->
<!--
  Tests postMessage() for workers.
-->

<html>
<head>
  <title>Cobalt Worker postMessage() Test</title>
  <script src='black_box_js_test_utils.js'></script>
</head>
<body>
  <script>
    const timeoutId = window.setTimeout(notReached, 10000);
    window.sharedArrayBufferFromWorker = null;
    window.sharedArrayBufferFromWorkerView = null;
    window.sharedArrayBufferFromWindow = new SharedArrayBuffer(4);
    window.sharedArrayBufferFromWindowView = new Uint8Array(window.sharedArrayBufferFromWindow);
    const worker = new Worker('worker_post_message_test.js');
    worker.addEventListener('message', event => {
      if (event.data === 'ready') {
        const arrayBuffer = new ArrayBuffer(3);
        const arrayBufferView = new Uint8Array(arrayBuffer);
        arrayBufferView[0] = 4;
        arrayBufferView[1] = 5;
        arrayBufferView[2] = 6;
        worker.postMessage({
          type: 'check-data',
          data: {
            number: 1,
            array: [2, 3],
            string: 'abc',
            arrayBuffer,
            sharedArrayBuffer: sharedArrayBufferFromWindow,
          },
        });
        return;
      }
      if (event.data.type === 'check-data') {
        const data = event.data.data;
        assertEqual(1, data.number);
        assertEqual(2, data.array.length);
        assertEqual(2, data.array[0]);
        assertEqual(3, data.array[1]);
        assertEqual('abc', data.string);
        assertEqual(3, data.arrayBuffer.byteLength);
        const arrayBufferView = new Uint8Array(data.arrayBuffer);
        assertEqual(4, arrayBufferView[0]);
        assertEqual(5, arrayBufferView[1]);
        assertEqual(6, arrayBufferView[2]);
        assertEqual(5, data.sharedArrayBuffer.byteLength);
        window.sharedArrayBufferFromWorker = data.sharedArrayBuffer;
        window.sharedArrayBufferFromWorkerView = new Uint8Array(window.sharedArrayBufferFromWorker);
        worker.postMessage({
          type: 'update-shared-array-buffers',
          index: 1,
          value: 42,
        });
        return;
      }
      if (event.data.type === 'update-shared-array-buffers-done') {
        assertEqual(42, window.sharedArrayBufferFromWindowView[1]);
        assertEqual(42, window.sharedArrayBufferFromWorkerView[1]);
        window.sharedArrayBufferFromWindowView[0] = 47;
        window.sharedArrayBufferFromWorkerView[0] = 47;
        worker.postMessage({
          type: 'check-shared-array-buffers',
          index: 0,
          value: 47,
        })
        return;
      }
      if (event.data.type === 'check-shared-array-buffers-done') {
        clearTimeout(timeoutId);
        onEndTest();
        return;
      }
      console.log(JSON.stringify(event.data));
      notReached();
    });

    setupFinished();
  </script>
</body>
</html>