audioworkletglobalscope-creation-time.https.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-audioworklet-interface/audioworkletglobalscope-creation-time.https.html - WPT Dashboard Interop Dashboard

<!doctype html>

<title>Test consistency of processing after resume()</title>

<script src=/resources/testharness.js></script>

<script src=/resources/testharnessreport.js></script>

<script>

const get_node_and_reply = (context) => {

  const node = new AudioWorkletNode(context, 'port-processor');

  return new Promise((resolve) => {

    node.port.onmessage = (event) => resolve({node: node, reply: event.data});

});

};

const modulePath = '/webaudio/the-audio-api/' +

    'the-audioworklet-interface/processors/port-processor.js';

promise_test(async t => {

  const realtime = new AudioContext();

  const sampleRate = realtime.sampleRate;

  // Create a basic oscillator to form an audio graph.

  const oscillator = realtime.createOscillator();

  oscillator.connect(realtime.destination);

  oscillator.start();

  // Start rendering and suspend after a delay.

  await new Promise(resolve => t.step_timeout(resolve, 1000));

  await realtime.suspend();

  // Capture currentTime after suspending.

  const contextTime = realtime.currentTime;

  // Load the audio module.

  await realtime.audioWorklet.addModule(modulePath);

  // creates AudioWorkletNode.

  const construct1 = await get_node_and_reply(realtime);

  // workletFrame should be the currentFrame sent in the message

  // by the AudioWorkletNode.

  const workletFrame = construct1.reply.currentFrame;

  // Assert that contextTime * sampleRate equals workletFrame.

  assert_equals(

      Math.floor(contextTime * sampleRate), workletFrame,

      `Expected workletFrame (${

          workletFrame}) to be equal to contextTime * sampleRate (${

          contextTime * sampleRate})`);

}, 'currentTime vs currentFrames in Audio Worklet global scope');

</script>