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<!DOCTYPE html>
<meta charset="utf-8">
<link rel="author" title="Joey Arhar" href="mailto:jarhar@chromium.org">
<link rel="help" href="https://bugs.chromium.org/p/chromium/issues/detail?id=1209217">
<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>
<button id=button1>one</button>
<span>
<template shadowroot=open>
<slot name=myslot></slot>
</template>
<slot slot=myslot>
<button id=button2>two</button>
<button id=button3>three</button>
<button id=button4>four</button>
</slot>
</span>
<button id=button5>five</button>
<script>
promise_test(async () => {
convertDeclarativeTemplatesToShadowRootsWithin(document);
button1.focus();
assert_equals(document.activeElement, button1);
await navigateFocusForward();
assert_equals(document.activeElement, button2);
await navigateFocusForward();
assert_equals(document.activeElement, button3);
await navigateFocusForward();
assert_equals(document.activeElement, button4);
await navigateFocusForward();
assert_equals(document.activeElement, button5);
await navigateFocusBackward();
assert_equals(document.activeElement, button4);
await navigateFocusBackward();
assert_equals(document.activeElement, button3);
await navigateFocusBackward();
assert_equals(document.activeElement, button2);
await navigateFocusBackward();
assert_equals(document.activeElement, button1);
}, `Verifies that focus order goes in flat tree order with buttons inside nested slots which have a mixture of assigned and unassigned states.`);
</script>
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