activation-traverse-then-clobber.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/navigation-activation/activation-traverse-then-clobber.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 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");

  let from_key_before_push = i.contentWindow.navigation.activation.from.key;

  let from_id_before_push = i.contentWindow.navigation.activation.from.id;

  let from_url_before_push = i.contentWindow.navigation.activation.from.url;

  await i.contentWindow.navigation.navigate("/common/blank.html#fragment").finished;

  // pushing same document will not change activation.entry, but it will cut

  // activation.from out of the entries array. Its parameters should not change

  //except for its index, which becomes -1.

  assert_equals(i.contentWindow.navigation.entries().length, 2);

  assert_equals(i.contentWindow.navigation.activation.entry, i.contentWindow.navigation.entries()[0]);

  assert_equals(i.contentWindow.navigation.activation.entry.index, 0);

  assert_not_equals(i.contentWindow.navigation.activation.from,

                    i.contentWindow.navigation.entries()[1]);

  assert_equals(i.contentWindow.navigation.activation.from.key, from_key_before_push);

  assert_equals(i.contentWindow.navigation.activation.from.id, from_id_before_push);

  assert_equals(i.contentWindow.navigation.activation.from.url, from_url_before_push);

  assert_equals(i.contentWindow.navigation.activation.from.index, -1);

  assert_equals(i.contentWindow.navigation.activation.navigationType, "traverse");

}, "navigation.activation - traverse, then push same-document");

</script>