audiocontext-suspend-resume.html

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This test has a WPT meta file that expects 6 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-audiocontext-interface/audiocontext-suspend-resume.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

  <head>

    <title>

      Test AudioContext.suspend() and AudioContext.resume()

    </title>

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

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

    <script src="/webaudio/resources/audit-util.js"></script>

    <script src="/webaudio/resources/audit.js"></script>

  </head>

  <body>

    <script id="layout-test-code">

      let offlineContext;

      let osc;

      let p1;

      let p2;

      let p3;

      let sampleRate = 44100;

      let durationInSeconds = 1;

      let audit = Audit.createTaskRunner();

      // Task: test suspend().

      audit.define(

            label: 'test-suspend',

            description: 'Test suspend() for offline context'

},

          function(task, should) {

            // Test suspend/resume.  Ideally this test is best with a online

            // AudioContext, but content shell doesn't really have a working

            // online AudioContext. Hence, use an OfflineAudioContext. Not all

            // possible scenarios can be easily checked with an offline context

            // instead of an online context.

            // Create an audio context with an oscillator.

            should(

                () => {

                  offlineContext = new OfflineAudioContext(

                      1, durationInSeconds * sampleRate, sampleRate);

},

                'offlineContext = new OfflineAudioContext(1, ' +

                    (durationInSeconds * sampleRate) + ', ' + sampleRate + ')')

                .notThrow();

            osc = offlineContext.createOscillator();

            osc.connect(offlineContext.destination);

            // Verify the state.

            should(offlineContext.state, 'offlineContext.state')

                .beEqualTo('suspended');

            // Multiple calls to suspend() should not be a problem. But we can't

            // test that on an offline context.  Thus, check that suspend() on

            // an OfflineAudioContext rejects the promise.

            should(

                () => p1 = offlineContext.suspend(),

                'p1 = offlineContext.suspend()')

                .notThrow();

            should(p1 instanceof Promise, 'p1 instanceof Promise').beTrue();

            should(p1, 'p1').beRejected().then(task.done.bind(task));

});

      // Task: test resume().

      audit.define(

            label: 'test-resume',

            description: 'Test resume() for offline context'

},

          function(task, should) {

            // Multiple calls to resume should not be a problem. But we can't

            // test that on an offline context. Thus, check that resume() on an

            // OfflineAudioContext rejects the promise.

            should(

                () => p2 = offlineContext.resume(),

                'p2 = offlineContext.resume()')

                .notThrow();

            should(p2 instanceof Promise, 'p2 instanceof Promise').beTrue();

            // Resume doesn't actually resume an offline context

            should(offlineContext.state, 'After resume, offlineContext.state')

                .beEqualTo('suspended');

            should(p2, 'p2').beRejected().then(task.done.bind(task));

});

      // Task: test the state after context closed.

      audit.define(

            label: 'test-after-close',

            description: 'Test state after context closed'

},

          function(task, should) {

            // Render the offline context.

            osc.start();

            // Test suspend/resume in tested promise pattern. We don't care

            // about the actual result of the offline rendering.

            should(

                () => p3 = offlineContext.startRendering(),

                'p3 = offlineContext.startRendering()')

                .notThrow();

            p3.then(() => {

              should(offlineContext.state, 'After close, offlineContext.state')

                  .beEqualTo('closed');

              // suspend() should be rejected on a closed context.

              should(offlineContext.suspend(), 'offlineContext.suspend()')

                  .beRejected()

                  .then(() => {

                    // resume() should be rejected on closed context.

                    should(offlineContext.resume(), 'offlineContext.resume()')

                        .beRejected()

                        .then(task.done.bind(task));

})

});

});

      audit.define(

            label: 'resume-running-context',

            description: 'Test resuming a running context'

},

          (task, should) => {

            let context;

            should(() => context = new AudioContext(), 'Create online context')

                .notThrow();

            should(context.state, 'context.state').beEqualTo('suspended');

            should(context.resume(), 'context.resume')

                .beResolved()

                .then(() => {

                  should(context.state, 'context.state after resume')

                      .beEqualTo('running');

})

                .then(() => task.done());

});

      audit.run();

    </script>

  </body>

</html>