autoplay-explicit-suspension.html | Explore in Territory

<!DOCTYPE html>
<html>
  <head>
    <title>
      Test if starting source node does not resume an explicitly suspended
      context
    </title>
    <script src="../../resources/testharness.js"></script>
    <script src="../../resources/testharnessreport.js"></script>
    <script src="../resources/audit.js"></script>
  </head>
  <body>
    <script id="layout-test-code">
      const audit = Audit.createTaskRunner();
      const autoplayFlag = internals.settings.autoplayIgnoresWebAudioEnabled;

      internals.settings.setAutoplayPolicy('document-user-activation-required');
      internals.settings.autoplayIgnoresWebAudioEnabled = false;

      // Suspend a context explicitly and then start a source node after
      // user gesture. The context state should stay the same.
      audit.define({label: 'suspend-and-start'}, async (task, should) => {
        const context = new AudioContext();
        const source = new OscillatorNode(context);
        source.connect(context.destination);

        await context.suspend();
        should(context.state, 'The context state after explicit suspension')
            .beEqualTo('suspended');

        // Starting a source node should not unlock an explicitly suspended
        // context, even if the event is originated from user gesture.
        await emulateUserGesture();
        source.start();
        should(context.state,
            'The context state after user gesture followed by source start')
            .beEqualTo('suspended');

        task.done();
      });

      audit.define({label: 'clean-up'}, (task, should) => {
        internals.runtimeFlags.autoplayIgnoresWebAudioEnabled = autoplayFlag;
        internals.settings.setAutoplayPolicy('no-user-gesture-required');
        task.done();
      });

      audit.run();

      function emulateUserGesture() {
        return new Promise((resolve, reject) => {
          chrome.gpuBenchmarking.pointerActionSequence([{
            source: 'mouse',
            actions: [
              { name: 'pointerDown', x: 1, y: 1 },
              { name: 'pointerUp' },
            ]
          }], resolve);
        });
      }
    </script>
  </body>
</html>
chromium/third_party/blink/web_tests/webaudio/AudioContext/autoplay-explicit-suspension.html
