offlineaudiocontext-detached-execution-context.html

<!DOCTYPE html>
<html>
  <head>
    <title>
      Testing behavior OfflineAudioContext after execution context is detached
    </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('decoding-on-detached-iframe', (task, should) => {
        const iframe =
            document.createElementNS("http://www.w3.org/1999/xhtml", "iframe");
        document.body.appendChild(iframe);

        // Use the lowest value possible for the faster test.
        let context =
            new iframe.contentWindow.OfflineAudioContext(1, 1, 8000);

        document.body.removeChild(iframe);

        return should(context.decodeAudioData(new ArrayBuffer(1)),
               'decodeAudioData() upon a detached iframe')
            .beRejectedWith('InvalidStateError');
      });

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

chromium/third_party/blink/web_tests/external/wpt/webaudio/the-audio-api/the-offlineaudiocontext-interface/offlineaudiocontext-detached-execution-context.html