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<!doctype html>
<meta charset="utf-8">
<title>Iframe's contentDocument should only change after its pending load has matured.</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<body></body>
<script>
async_test(function(t) {
var iframe = document.createElement("iframe");
document.body.appendChild(iframe);
var checkedDuringParse = false;
iframe.onload = t.step_func_done(function() {
testContentDocument();
assert_true(checkedDuringParse);
});
let url = "support/iframe-that-checks-contentDocument.html";
window.testContentDocument = t.step_func(function() {
assert_true(iframe.contentDocument.location.toString().includes(url));
checkedDuringParse = true;
});
assert_equals(iframe.contentDocument.location.toString(), "about:blank");
iframe.src = url + "?pipe=trickle(d2)";
// The location of the contentDocument should not change until the new document has matured.
assert_equals(iframe.contentDocument.location.toString(), "about:blank");
}, "contentDocument should only change after a load matures.");
</script>
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