audioworkletglobalscope-sample-rate.https.html

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This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-audioworklet-interface/audioworkletglobalscope-sample-rate.https.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

  <head>

    <title>

      Test sampleRate in AudioWorkletGlobalScope

    </title>

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

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

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

  </head>

  <body>

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

      let audit = Audit.createTaskRunner();

      setup(() => {

        let sampleRate = 48000;

        let renderLength = 512;

        let context = new OfflineAudioContext(1, renderLength, sampleRate);

        let filePath = 'processors/one-pole-processor.js';

        // Without rendering the context, attempt to access |sampleRate| in the

        // global scope as soon as it is created.

        audit.define(

            'Query |sampleRate| upon AudioWorkletGlobalScope construction',

            (task, should) => {

              let onePoleFilterNode =

                  new AudioWorkletNode(context, 'one-pole-filter');

              let frequencyParam = onePoleFilterNode.parameters.get('frequency');

              should(frequencyParam.maxValue,

                     'frequencyParam.maxValue')

                  .beEqualTo(0.5 * context.sampleRate);

              task.done();

});

        context.audioWorklet.addModule(filePath).then(() => {

          audit.run();

});

});

    </script>

  </body>

</html>