third_party/WebKit/LayoutTests/webaudio/Gain/gain-basic.html

<!DOCTYPE html>
<!--
Verifies GainNode attributes and their type.
-->
<html>
  <head>
    <title>
      gain-basic.html
    </title>
    <script src="../../resources/testharness.js"></script>
    <script src="../../resources/testharnessreport.js"></script>
    <script src="../resources/audit-util.js"></script>
    <script src="../resources/audit.js"></script>
  </head>
  <body>
    <script id="layout-test-code">
      let audit = Audit.createTaskRunner();

      audit.define('test', function(task, should) {
        // Create audio context.
        let context = new AudioContext();

        // Create gain node.
        let gainNode = context.createGain();

        should(
            gainNode.gain instanceof AudioParam,
            'gainNode.gain instanceof AudioParam')
            .beTrue();

        task.done();
      });

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