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<!DOCTYPE html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="resources/shadow-dom.js"></script>
<script src="resources/focus-utils.js"></script>
<div id="log"></div>

<input id="i0" tabindex=0 value="i0">
<div id="assigned">
  <template data-mode="open">
    <slot id="s0" name="s0">
      <div id="x-foo">
        <input id="a1" slot="s2" value="a1">
        <template data-mode="open">
          <input id="a2" tabindex=3 value="a2">
          <slot id="s1" name="s1" tabindex=2>
            <slot id="s2" name="s2"></slot>
          </slot>
          <input id="a0" tabindex=1 value="a0">
        </template>
      </div>
    </slot>
  </template>
</div>

<script>
'use strict';

promise_test(async () => {
    let assigned = document.getElementById('assigned');
    convertTemplatesToShadowRootsWithin(assigned);

    let elements = [
        'i0',
        'assigned/x-foo/a0',
        'assigned/a1',
        'assigned/x-foo/a2'
    ];

    await assert_focus_navigation_forward(elements);
    elements.reverse();
    await assert_focus_navigation_backward(elements);
}, 'Focus should cover assigned elements of an assigned slot, as well as elements that are directly assigned to a slot.');
</script>