File: test_ua_widget_elementFromPoint.html

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<!doctype html>
<title>UA Widget getElementFromPoint</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<script src="/tests/SimpleTest/EventUtils.js"></script>
<link rel="stylesheet" href="/tests/SimpleTest/test.css" />
<div id="host" style="width: 100px; height: 100px;"></div>
<script>
const host = document.getElementById("host");
SpecialPowers.wrap(host.attachShadow({ mode: "open"})).setIsUAWidget();
host.shadowRoot.innerHTML = `
  <div style="width: 100px; height: 100px; background-color: green;"></div>
`;
let hostRect = host.getBoundingClientRect();
let point = {
  x: hostRect.x + 50,
  y: hostRect.y + 50,
};
is(document.elementFromPoint(point.x, point.y), host,
   "Host should be found from the document");
is(host.shadowRoot.elementFromPoint(point.x, point.y), host.shadowRoot.firstElementChild,
   "Should not have retargeted UA widget content to host unnecessarily");
</script>