test_forceSampleRate.html

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<!DOCTYPE HTML>

<html>

<head>

  <title>Test the pref media.cubeb.force_sample_rate</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />

</head>

<body>

<script class="testbody" type="text/javascript">

const WEIRD_SAMPLE_RATE = 44101;

SimpleTest.waitForExplicitFinish();

SpecialPowers.pushPrefEnv({"set": [

  ["media.cubeb.force_sample_rate", WEIRD_SAMPLE_RATE]

]}).then(function() {

  var ac = new AudioContext();

  is(ac.sampleRate, WEIRD_SAMPLE_RATE, "Forced sample-rate set successfully.");

  SimpleTest.finish();

});

</script>

</pre>

</body>