<!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();

      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>