traverseTo-after-adding-iframe.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-methods/traverseTo-after-adding-iframe.html - WPT Dashboard Interop Dashboard

<!doctype html>

<script src="/resources/testharness.js"></script>

<script src="/resources/testharnessreport.js"></script>

<body>

<script>

async_test(t => {

  let start_length = navigation.entries().length;

  // Wait for after the load event so that the navigation doesn't get converted

  // into a replace navigation.

  window.onload = () => t.step_timeout(() => {

    navigation.navigate("#top");

    assert_equals(navigation.entries().length, start_length + 1);

    let i = document.createElement("iframe");

    i.src = "/common/blank.html";

    document.body.appendChild(i);

    i.onload = () => t.step_timeout(() => {

      assert_equals(i.contentWindow.navigation.entries().length, 1);

      i.contentWindow.navigation.navigate("#fragment");

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

      i.contentWindow.navigation.back().committed.then(t.step_func(() => {

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

        assert_equals(i.contentWindow.navigation.currentEntry.index, 0);

        return i.contentWindow.navigation.forward().committed;

      })).then(t.step_func_done(() => {

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

        assert_equals(i.contentWindow.navigation.currentEntry.index, 1);

      }));

    }, 0);

  }, 0);

}, "navigation.traverseTo() should work in an iframe that is not present in all history entries");

</script>

</body>