css/css-scoping/shadow-multiple-links.html

<!doctype html>
<title>CSS Test: ShadowRoot with multiple sheet links with the same href shouldn't crash</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<link rel="author" title="Emilio Cobos Álvarez" href="mailto:emilio@crisal.io">
<link rel="help" href="https://drafts.csswg.org/css-scoping/#selectors-data-model">
<div id="host"></div>
<script>
test(function() {
  host.attachShadow({ mode: "open" }).innerHTML = `
    <link rel="stylesheet" href="data:text/css,">
    <link rel="stylesheet" href="data:text/css,">
  `;
}, "Multiple stylesheets with the same href in a ShadowRoot should not assert or crash");
</script>