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Test Info: Warnings

<!DOCTYPE html>
<html>
<head>
<title>Test for Bug 1702678</title>
<meta charset="utf-8">
<link rel="stylesheet" type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"/>
</head>
<body>
<script type="application/javascript">
"use strict";
const HTML = `
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script>
// We need to queue a promise reaction job whilch will close the window
// during the nested event loop spun up by the window opening code.
Promise.resolve().then(() => {
window.close();
});
window.open("data:text/html,Hello");
<\/script>
</head>
</html>
`;
add_task(async function() {
// This bug only manifests when opening tabs in new windows.
await SpecialPowers.pushPrefEnv({
set: [["browser.link.open_newwindow", 2]],
});
// Create a window in a new BrowsingContextGroup so that it will be the last
// window in the group when it closes, and the group will be destroyed.
window.open(`data:text/html,${encodeURIComponent(HTML)}`, "", "noopener");
// Make a few trips through the event loop to ensure we've had a chance to
// open and close the relevant windows.
for (let i = 0; i < 10; i++) {
await new Promise(resolve => setTimeout(resolve, 0));
}
ok(true, "We didn't crash");
});
</script>
</body>
</html>