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Test Info:

<!DOCTYPE html>
<script src=/resources/testharness.js></script>
<script src=/resources/testharnessreport.js></script>
async_test(t => {
// opaque-origin1.html navigates itself to opaque-origin2.html onload.
// The 'src' shorthand in allow="fullscreen 'src'" should only match
// the initial src of opaque-origin1.html. opaque-origin2.html
// should not get access to fullscreen.
const iframe = document.createElement('iframe');
iframe.sandbox = 'allow-scripts';
iframe.src = 'resources/opaque-origin1.sub.https.html';
iframe.allow = "fullscreen 'src'";
window.addEventListener('message', t.step_func_done(e => {
assert_equals(, "fullscreen disabled in opaque-origin2.html");