focus-navigation-slot-nested-fallback.html

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This WPT test may be referenced by the following Test IDs:
- /shadow-dom/focus-navigation/focus-navigation-slot-nested-fallback.html - WPT Dashboard Interop Dashboard

<!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>

<p>Tests for moving focus by pressing tab key across shadow boundaries.<br>

To manually test, press tab key six times then shift+tab six times.<br>

It should traverse focusable elements in the increasing numerical order and then in the reverse order.</p>

<div id='host'>

  <template data-mode='open'>

    <slot name='slot1'>Slot shouldn't be focused.

      <slot name='slot2'>Slot shouldn't be focused.

        <div id='non1' tabindex=0>This text shouldn't appear.</div>

      </slot>

      <slot name='slot3'>Slot shouldn't be focused.

        <div id='second' tabindex=0>2. No host child is assigned to slot3.</div>

      </slot>

    </slot>

    <div id='third' tabindex=0>3. Inner Shadow Host.

      <template data-mode='open'>

        <slot name='slot4'>Slot shouldn't be focused.

          <slot name='slot5'>Slot shouldn't be focused.

            <div id='non2' tabindex=0>This text shouldn't appear.</div>

          </slot>

        </slot>

      </template>

      <div id='fourth' slot='slot4' tabindex=0>4. Assigned to slot4.</div>

      <div id='non3' slot='slot5' tabindex=0>

        This text shouldn't appear. slot5 is in the fallback content of slot4 which has assigned nodes.</div>

    </div>

    <div id='fifth' tabindex=0>5. Inner Shadow Host.

      <template data-mode='open'>

        <slot name='slot6'>Slot shouldn't be focused.

          <div id='non4' tabindex=0>This text shouldn't appear.</div>

        </slot>

      </template>

      <slot name='slot7' slot='slot6'>Slot shouldn't be focused. Assigned to slot6.

        <div id='non5' tabindex=0>This text shouldn't appear.</div>

      </slot>

    </div>

  </template>

  <div id='first' slot='slot2' tabindex=0>1. Assigned to slot2.</div>

  <div id='sixth' slot='slot7' tabindex=0>6. Assigned to slot7 which is assigned to slot6.</div>

</div>

<script>

'use strict';

promise_test(async () => {

  let host = document.getElementById('host');

  convertTemplatesToShadowRootsWithin(host);

  let elements = [

       'first',

       'host/second',

       'host/third',

       'host/fourth',

       'host/fifth',

       'sixth'

];

  await assert_focus_navigation_bidirectional(elements);

}, 'Focus should cover assigned elements of an assigned slot espacially there are fallback contents.');

</script>