transition-realms-and-identity.html

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This test has a WPT meta file that expects 1 subtest issues.
This WPT test may be referenced by the following Test IDs:
- /navigation-api/ordering-and-transition/transition-realms-and-identity.html - WPT Dashboard Interop Dashboard

<!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>