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servo/tests/wpt/web-platform-tests/html/dom/dynamic-markup-insertion/opening-the-input-stream/001.html

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HTML

<!doctype html>
<title>Replacement of window object after document.open</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<iframe></iframe>
<script>
var t = async_test();
onload = t.step_func(function() {
var iframe = document.getElementsByTagName("iframe")[0];
iframe.contentWindow.state = 1;
var handle = iframe.contentWindow;
iframe.contentDocument.open();
assert_false("state" in iframe.contentWindow, "Variables are not preserved after document.open");
assert_equals(iframe.contentWindow.state, undefined, "Variables are not preserved after document.open");
assert_equals(iframe.contentWindow, handle);
t.done();
});
</script>