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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_func(() => {
i.contentWindow.navigation.updateCurrentEntry({ state: { data: "value" } });
assert_equals(i.contentWindow.navigation.entries().length, 1);
assert_equals(i.contentWindow.navigation.currentEntry.getState().data, "value");
let navigated_back = false;
i.contentWindow.navigation.navigate("?1");
i.onload = t.step_func(() => {
if (navigated_back) {
let back_entry = i.contentWindow.navigation.currentEntry;
assert_equals(i.contentWindow.navigation.entries().length, 2);
assert_equals(back_entry.index, 0);
assert_equals(back_entry.getState().data, "value");
t.done();
} else {
assert_equals(i.contentWindow.navigation.entries().length, 2);
assert_equals(i.contentWindow.navigation.currentEntry, i.contentWindow.navigation.entries()[1]);
assert_equals(i.contentWindow.navigation.currentEntry.getState(), undefined);
history.back();
navigated_back = true;
}
});
});
}, "entry.getState() behavior after navigating away and back");
</script>
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