testing/web-platform/tests/navigation-api/navigation-methods/disambigaute-back.html
author Sotaro Ikeda <sotaro.ikeda.g@gmail.com>
Thu, 10 Jul 2025 00:10:09 +0000 (8 hours ago)
changeset 795941 23763b72c35abeead04f63e4503c28abc73d065d
parent 683006 e07bed29cec7132e582ee3c817c246fe2af0e1b9
permissions -rw-r--r--
Bug 1976135 - Remove nightly only limitation of pref gfx.webrender.layer-compositor r=gfx-reviewers,gw Differential Revision: https://phabricator.services.mozilla.com/D256379
<!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 => {
  let start_length = navigation.entries().length;
  let start_index = navigation.currentEntry.index;
  // Wait for after the load event so that the navigation doesn't get converted
  // into a replace navigation.
  window.onload = () => t.step_timeout(() => {
    assert_equals(navigation.entries().length, start_length);
    assert_equals(i.contentWindow.navigation.entries().length, 1);
    navigation.navigate("#top");
    assert_equals(navigation.entries().length, start_length+1);
    assert_equals(i.contentWindow.navigation.entries().length, 1);
    i.contentWindow.navigation.navigate("#1");
    assert_equals(navigation.entries().length, start_length+1);
    assert_equals(i.contentWindow.navigation.entries().length, 2);
    assert_equals(navigation.currentEntry.index, start_index+1);
    assert_equals(i.contentWindow.navigation.currentEntry.index, 1);
    assert_true(navigation.canGoBack);
    assert_true(i.contentWindow.navigation.canGoBack);

    // There are 2 joint session history entries containing the iframe's
    // previous key. Navigate to the nearest one (which navigates the iframe
    // but not the top window).
    i.contentWindow.navigation.back().committed.then(t.step_func_done(() => {
      assert_equals(navigation.currentEntry.index, start_index+1);
      assert_equals(i.contentWindow.navigation.currentEntry.index, 0);
    }));
  }, 0);
}, "navigation.back() goes to the nearest back entry");
</script>