offlineaudiocontext-suspend-resume-promise.html

<!DOCTYPE html>
<html>
  <head>
    <title>
      offlineaudiocontext-suspend-resume-promise.html
    </title>
    <script src="../../resources/testharness.js"></script>
    <script src="../../resources/testharnessreport.js"></script>
    <script src="../resources/audit-util.js"></script>
    <script src="../resources/audit.js"></script>
  </head>
  <body>
    <script id="layout-test-code">
      let audit = Audit.createTaskRunner();
      let context;

      // The sample rate is multiple of the rendering quantum, so suspension
      // times fall in to the render quantum boundary.
      let renderQuantum = 128;

      let sampleRate = renderQuantum * 100;
      let renderDuration = 2;
      let scheduledSuspendTime = 0;

      // With the sample rate setting above, this ensures suspension time fall
      // in to the render quantum boundary.
      let suspendInterval = 0.25;

      function onSuspended(should) {
        if (context.state === 'suspended' &&
            context.currentTime === scheduledSuspendTime) {
          should(
              context.state === 'suspended' &&
                  context.currentTime === scheduledSuspendTime,
              'Context suspended at ' + scheduledSuspendTime + ' second(s)')
              .beTrue();

          scheduledSuspendTime = context.currentTime + suspendInterval;

          // Scheduling a suspend before the render duration should pass.
          if (scheduledSuspendTime < renderDuration) {
            should(
                () => context.suspend(scheduledSuspendTime)
                          .then(() => onSuspended(should)),
                'Scheduling a new suspend at ' + scheduledSuspendTime +
                    ' second(s)')
                .notThrow();
          }

          // Scheduling a suspend exactly at the render duration should be
          // rejected.
          if (scheduledSuspendTime === renderDuration) {
            should(
                context.suspend(scheduledSuspendTime),
                'Scheduling at ' + renderDuration + ' seconds')
                .beRejected();
          }

          context.resume();
        }
      }

      audit.define(
          {
            label: 'test',
            description: 'Promise resolution of resume() and suspend()'
          },
          (task, should) => {
            context = new OfflineAudioContext(
                1, sampleRate * renderDuration, sampleRate);

            // Schedule the first suspension.
            should(
                () => context.suspend(scheduledSuspendTime)
                          .then(() => onSuspended(should)),
                'Scheduling a new suspend at ' + scheduledSuspendTime +
                    ' second(s)')
                .notThrow();

            context.startRendering()
                .then(function() {
                  should(context.state, 'Promise context.state')
                      .beEqualTo('closed');
                })
                .then(() => task.done());
          });

      audit.run();
    </script>
  </body>
</html>
chromium/third_party/blink/web_tests/webaudio/OfflineAudioContext/offlineaudiocontext-suspend-resume-promise.html
