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<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<iframe id="i" src="/common/blank.html"></iframe>
<script>
async_test(t => {
window.onload = () => t.step_timeout(t.step_func(() => {
let starting_history_length = history.length;
location.hash = "#a";
assert_equals(starting_history_length + 1, history.length);
i.contentWindow.location.hash = "#b";
assert_equals(starting_history_length + 2, history.length);
let popstateCount = 0;
const popstateCalled = t.step_func(() => {
popstateCount++;
if (popstateCount < 2)
return;
assert_equals(location.hash, "");
assert_equals(i.contentWindow.location.hash, "");
t.done();
});
window.onpopstate = popstateCalled;
i.contentWindow.onpopstate = popstateCalled;
history.go(-2);
}), 0);
}, "A history traversal should be able to navigate a parent and child simultaneously");
</script>
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