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<!DOCTYPE html>
<meta charset=utf-8>
<title>
Check sandbox-flags aren't lost after using document.open().
</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body>
<script>
promise_test(async test => {
let message = new Promise(resolve =>
window.addEventListener("message", event => resolve(event.data))
);
let iframe = document.createElement("iframe");
iframe.setAttribute("sandbox", "allow-scripts allow-same-origin");
iframe.setAttribute("src", "./resources/document-open.html")
document.body.appendChild(iframe);
assert_equals(await message, "document-domain-is-disallowed");
}, "document.open()");
promise_test(async test => {
let iframe = document.createElement("iframe");
iframe.setAttribute("sandbox", "allow-scripts allow-same-origin");
iframe.setAttribute("src", "/common/blank.html");
let loaded = new Promise(resolve => iframe.onload = resolve);
document.body.appendChild(iframe);
await loaded;
let message = new Promise(resolve =>
window.addEventListener("message", event => resolve(event.data))
);
iframe.contentDocument.write(`
<script>
try {
document.domain = document.domain;
parent.postMessage('document-domain-is-allowed', '*');
} catch (error) {
parent.postMessage('document-domain-is-disallowed', '*');
}
</sc`+`ript>
`);
assert_equals(await message, "document-domain-is-disallowed");
}, "other_document.open()");
</script>
</body>
</html>
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