assert-on-insertedIntoDocument.html

<body>
<script>
if (window.testRunner)
    testRunner.dumpAsText();

var subtree = document.createElement('div');
var styleElement = document.createElement('style');
styleElement.textContent = "iframe { border: 3px solid blue; }";
subtree.appendChild(styleElement);
subtree.appendChild(document.createElement('iframe'));
document.body.appendChild(subtree);
</script>
<div>PASS - this test did not ASSERT in debug mode.</div>
</body>

chromium/third_party/blink/web_tests/fast/frames/assert-on-insertedIntoDocument.html