history-traversal-navigates-multiple-frames.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:
- /html/browsers/browsing-the-web/history-traversal/history-traversal-navigates-multiple-frames.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>

async_test(t => {

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

    let starting_history_length = history.length;

    location.hash = "#a";

    assert_equals(starting_history_length + 1, history.length);

    i.contentWindow.location.hash = "#b";

    assert_equals(starting_history_length + 2, history.length);

    let popstateCount = 0;

    const popstateCalled = t.step_func(() => {

      popstateCount++;

      if (popstateCount < 2)

        return;

      assert_equals(location.hash, "");

      assert_equals(i.contentWindow.location.hash, "");

      t.done();

});

    window.onpopstate = popstateCalled;

    i.contentWindow.onpopstate = popstateCalled;

    history.go(-2);

  }), 0);

}, "A history traversal should be able to navigate a parent and child simultaneously");

</script>