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// In an ideal world this test would eventually be obsolete due to mutation events disappearing. Or
// would have to change to account for mutation events not firing synchronously. Neither seems
// realistic to the author though.
test(t => {
const frame = document.body.appendChild(document.createElement("iframe"));
frame.contentWindow.addEventListener("DOMNodeInserted", t.unreached_func());
frame.contentWindow.addEventListener("DOMNodeInserted", t.unreached_func(), true);
frame.contentWindow.addEventListener("DOMNodeInsertedIntoDocument", t.unreached_func(), true);
frame.contentWindow.addEventListener("DOMNodeRemoved", t.unreached_func());
frame.contentWindow.addEventListener("DOMNodeRemoved", t.unreached_func(), true);
frame.contentWindow.addEventListener("DOMNodeRemovedFromDocument", t.unreached_func(), true);
frame.contentWindow.addEventListener("DOMSubtreeModified", t.unreached_func());
frame.contentWindow.addEventListener("DOMSubtreeModified", t.unreached_func(), true);
assert_equals(frame.contentDocument.documentElement.localName, "html");
assert_equals(frame.contentDocument.open(), frame.contentDocument);
assert_equals(frame.contentDocument.documentElement, null);
frame.contentDocument.write("<div>heya</div>");
frame.contentDocument.close();
assert_equals(frame.contentDocument.documentElement.localName, "html");
frame.remove();
}, "document.open(), the HTML parser, and mutation events");
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