audiobuffer-getChannelData.html

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This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-audiobuffer-interface/audiobuffer-getChannelData.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

  <head>

    <title>

      Test AudioBuffer.getChannelData() Returns the Same Object

    </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>

    <script src="/webaudio/resources/audioparam-testing.js"></script>

  </head>

  <body>

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

      let sampleRate = 48000;

      let renderDuration = 0.5;

      let audit = Audit.createTaskRunner();

      audit.define('buffer-eq', (task, should) => {

        // Verify that successive calls to getChannelData return the same

        // buffer.

        let context = new AudioContext();

        let channelCount = 2;

        let frameLength = 1000;

        let buffer =

            context.createBuffer(channelCount, frameLength, context.sampleRate);

        for (let c = 0; c < channelCount; ++c) {

          let a = buffer.getChannelData(c);

          let b = buffer.getChannelData(c);

          let message = 'buffer.getChannelData(' + c + ')';

          should(a === b, message + ' === ' + message).beEqualTo(true);

        task.done();

});

      audit.define('buffer-not-eq', (task, should) => {

        let context = new AudioContext();

        let channelCount = 2;

        let frameLength = 1000;

        let buffer1 =

            context.createBuffer(channelCount, frameLength, context.sampleRate);

        let buffer2 =

            context.createBuffer(channelCount, frameLength, context.sampleRate);

        let success = true;

        for (let c = 0; c < channelCount; ++c) {

          let a = buffer1.getChannelData(c);

          let b = buffer2.getChannelData(c);

          let message = 'getChannelData(' + c + ')';

          should(a === b, 'buffer1.' + message + ' === buffer2.' + message)

                  .beEqualTo(false) &&

              success;

        task.done();

});

      audit.run();

    </script>

  </body>

</html>