third_party/WebKit/LayoutTests/webaudio/waveshaper-simple.html

<!doctype html>
<html>
  <head>
    <title>Simple Tests of WaveShaperNode</title>
    <script src="../resources/testharness.js"></script>
    <script src="../resources/testharnessreport.js"></script>
    <script src="resources/audio-testing.js"></script>
  </head>

  <body>
    <script>
      var audit = Audit.createTaskRunner();

      audit.defineTask("simple", function (taskDone) {
        var context = new OfflineAudioContext(1, 1, 48000);
        var shaper = context.createWaveShaper();

        // Verify default values are correct.
        Should("WaveShaper.curve", shaper.curve).beEqualTo(null);
        Should("WaveShaper.oversample", shaper.oversample).beEqualTo("none");

        // Set oversample and verify that it is set correctly.
        shaper.oversample = "2x";
        Should('Waveshaper.oversample = "2x"', shaper.oversample).beEqualTo("2x");

        shaper.oversample = "4x";
        Should('Waveshaper.oversample = "4x"', shaper.oversample).beEqualTo("4x");

        shaper.oversample = "invalid";
        Should('Waveshaper.oversample = "invalid"', shaper.oversample).beEqualTo("4x");

        // Set the curve and verify that the returned curve is the same as what
        // it was set to.
        var curve = Float32Array.from([-1, 0.25, .75]);
        shaper.curve = curve;
        Should("WaveShaper.curve", shaper.curve).beEqualToArray(curve);

        // Verify setting the curve to null works.
        shaper.curve = null;
        Should("Waveshaper.curve = null", shaper.curve).beEqualTo(null);

        taskDone();
      });

      audit.runTasks();
    </script>
  </body>
</html>