audioworkletprocessor-gc.https.html

<!doctype html>
<html>
<head>
<title>Test GC of AudioWorkletProcessor</title>
<script src="../../resources/gc.js"></script>
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
</head>
<body>
<script>
promise_test(async () => {
  await asyncGC();
  assert_equals(internals.audioHandlerCount(), 0,
                'the initial handler count should be zero.');

  const context = new AudioContext();
  await context.audioWorklet.addModule('worklet-processors/gc-processor.js');

  let node1 = new AudioWorkletNode(context, 'gc-processor');
  let node2 = new AudioWorkletNode(context, 'gc-processor');

  await new Promise(resolve => {
    // Checking `node2` only is good enough.
    node2.port.onmessage = (event) => {
      if (event.data.status === 'created') {
        resolve();
        node2.port.onmessage = null;
      }
    }
  });

  assert_equals(internals.audioHandlerCount(), 3,
                'the handler count should be 3.');
  assert_equals(internals.audioWorkletProcessorCount(), 2,
                'the worklet processor count should be 2.');

  return new Promise(resolve => {
    // Finish the life cycle of `node2` by terminating the matching processor.
    node2.port.postMessage({command: 'finish'});

    node2.port.onmessage = async (event) => {
      if (event.data.status === 'finished') {
        node2.port.onmessage = null;
        node2.port.close();
        node2.disconnect();
        node2 = null;

        // Perform GC and force clean up tasks of AudioContext.
        await asyncGC();
        await context.close();

        // Trigger GC on AudioWorkletGlobalScope via `node1` and its processor.
        node1.port.postMessage({command: 'gc'});

        node1.port.onmessage = async (event) => {
          if (event.data.status === 'collected') {
            assert_equals(internals.audioHandlerCount(), 2,
                          'the handler count after gc should be 2.');
            assert_equals(internals.audioWorkletProcessorCount(), 1,
                          'the worklet processor after gc count should be 1.');
            resolve();
          }
        };
      }
    };
  });
}, 'Test GC of AudioWorkletProcessor');
</script>
</body>
</html>
chromium/third_party/blink/web_tests/webaudio/internals/audioworkletprocessor-gc.https.html
