chromium/third_party/blink/web_tests/media/encrypted-media/encrypted-media-context-destroyed.html

<!DOCTYPE html>
<html>
    <head>
        <title>Test context destruction.</title>
        <script src="encrypted-media-utils.js"></script>
        <script src="../../resources/testharness.js"></script>
        <script src="../../resources/testharnessreport.js"></script>
    </head>
    <body>
        <script>
            function allociframe() {
                iframe = document.createElement('iframe');
                iframe.height = 50;
                iframe.width = 50;
                document.body.appendChild(iframe);
                return iframe;
            }

            promise_test(async function(test)
            {
                iframe = allociframe();
                keySystemAccess = await iframe.contentWindow.navigator.requestMediaKeySystemAccess('org.w3.clearkey', getSimpleConfiguration());
                keys = await keySystemAccess.createMediaKeys();
                const domException = iframe.contentWindow.DOMException;
                document.body.removeChild(iframe);
                return promise_rejects_dom(test,
                    'InvalidAccessError',
                    domException,
                    keys.getStatusForPolicy({minHdcpVersion : '1.0'}),
                    'getStatusforPolicy() should fail');
           }, 'Test context destruction.');
        </script>
    </body>
</html>