audiocontext-getoutputtimestamp-cross-realm.html

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This WPT test may be referenced by the following Test IDs:
- /webaudio/the-audio-api/the-audiocontext-interface/audiocontext-getoutputtimestamp-cross-realm.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<html>

  <head>

    <title>

      Testing AudioContext.getOutputTimestamp() method (cross-realm)

    </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">

      const audit = Audit.createTaskRunner();

      audit.define("getoutputtimestamp-cross-realm", function(task, should) {

        const mainContext = new AudioContext();

        return task.timeout(() => {

          const iframe = document.createElement("iframe");

          document.body.append(iframe);

          const iframeContext = new iframe.contentWindow.AudioContext();

          should(mainContext.getOutputTimestamp().performanceTime, "mainContext's performanceTime")

            .beGreaterThan(iframeContext.getOutputTimestamp().performanceTime, "iframeContext's performanceTime");

          should(iframeContext.getOutputTimestamp.call(mainContext).performanceTime, "mainContext's performanceTime (via iframeContext's method)")

            .beCloseTo(mainContext.getOutputTimestamp().performanceTime, "mainContext's performanceTime", { threshold: 0.01 });

        }, 1000);

});

      audit.run();

    </script>

  </body>

</html>