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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>
promise_test(async t => {
// Wait for after the load event so that the navigation doesn't get converted
// into a replace navigation.
await new Promise(resolve => window.onload = () => t.step_timeout(resolve, 0));
i.contentWindow.navigation.navigate("/common/blank.html?a");
await new Promise(resolve => i.onload = () => t.step_timeout(resolve, 0));
assert_equals(i.contentWindow.navigation.entries().length, 2);
i.contentWindow.navigation.back();
await new Promise(resolve => i.onload = () => t.step_timeout(resolve, 0));
// activation.entry is the current entry. activation.from is the entry the
// traverse came from.
assert_equals(i.contentWindow.navigation.entries().length, 2);
assert_equals(i.contentWindow.navigation.activation.entry, i.contentWindow.navigation.currentEntry);
assert_equals(i.contentWindow.navigation.activation.entry.index, 0);
assert_equals(i.contentWindow.navigation.activation.from,
i.contentWindow.navigation.entries()[1]);
assert_equals(i.contentWindow.navigation.activation.navigationType, "traverse");
i.contentWindow.navigation.forward();
await new Promise(resolve => i.onload = () => t.step_timeout(resolve, 0));
assert_equals(i.contentWindow.navigation.entries().length, 2);
assert_equals(i.contentWindow.navigation.activation.entry, i.contentWindow.navigation.currentEntry);
assert_equals(i.contentWindow.navigation.activation.entry.index, 1);
assert_equals(i.contentWindow.navigation.activation.from,
i.contentWindow.navigation.entries()[0]);
assert_equals(i.contentWindow.navigation.activation.navigationType, "traverse");
}, "navigation.activation after traverse");
</script>
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