click-focus-delegatesFocus-tabindex-zero.html

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This WPT test may be referenced by the following Test IDs:
- /shadow-dom/focus/click-focus-delegatesFocus-tabindex-zero.html - WPT Dashboard Interop Dashboard

<!DOCTYPE html>

<meta charset="utf-8">

<title>HTML Test: click on shadow host with delegatesFocus</title>

<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/shadow-utils.js"></script>

<body>

<div id="host">

  <div id="slotted">slotted</div>

</div>

<div id="outside">outside</div>

</body>

<script>

const host = document.getElementById("host");

const slotted = document.getElementById("slotted");

const shadowRoot = host.attachShadow({ mode: "open", delegatesFocus: true });

const aboveSlot = document.createElement("div");

aboveSlot.innerText = "aboveSlot";

const slot = document.createElement("slot");

// Add an unfocusable spacer, because test_driver.click will click on the

// center point of #host, and we don't want the click to land on #aboveSlot

// or #slot.

const spacer = document.createElement("div");

spacer.style = "height: 1000px;";

shadowRoot.appendChild(spacer);

shadowRoot.appendChild(aboveSlot);

shadowRoot.appendChild(slot);

const elementsInFlatTreeOrder = [host, aboveSlot, spacer, slot, slotted, outside];

// Final structure:

// <div #host> (delegatesFocus=true)

//    #shadowRoot

//      <div #spacer>

//      <div #aboveSlot>

//      <slot #slot>

//        (slotted) <div #slotted>

// <div #outside>

function setAllTabIndex(value) {

  setTabIndex(elementsInFlatTreeOrder, value);

function removeAllTabIndex() {

  removeTabIndex(elementsInFlatTreeOrder);

function resetTabIndexAndFocus() {

  removeAllTabIndex();

  resetFocus(document);

  resetFocus(shadowRoot);

promise_test(async () => {

  resetTabIndexAndFocus();

  setAllTabIndex(0);

  removeTabIndex([spacer]);

  await test_driver.click(host);

  assert_equals(shadowRoot.activeElement, aboveSlot);

  assert_equals(document.activeElement, host);

}, "click on host with delegatesFocus, all tabindex=0 except spacer");

</script>