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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 () => {
await new Promise(resolve => window.onload = resolve);
i.contentWindow.navigation.addEventListener("navigate", e => {
e.intercept();
});
const returnValueFinished1 = i.contentWindow.navigation.navigate("?1").finished;
const transition1 = i.contentWindow.navigation.transition;
const transitionFinished1 = transition1.finished;
assert_true(returnValueFinished1 instanceof i.contentWindow.Promise);
assert_true(transition1 instanceof i.contentWindow.NavigationTransition);
assert_true(transitionFinished1 instanceof i.contentWindow.Promise);
assert_not_equals(returnValueFinished1, transitionFinished1);
// Ensure the getters aren't generating new objects each time.
assert_equals(i.contentWindow.navigation.transition, transition1);
assert_equals(i.contentWindow.navigation.transition.finished, transitionFinished1);
assert_equals(await transitionFinished1, undefined);
// Ensure stuff does change after another navigation.
const committed2 = i.contentWindow.navigation.navigate("?2").committed;
const transition2 = i.contentWindow.navigation.transition;
const transitionFinished2 = transition2.finished;
assert_not_equals(transition2, transition1);
assert_not_equals(transitionFinished2, transitionFinished1);
await committed2;
}, "Realm and identity of the navigation.transition object and its finished promise");
</script>
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