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+<!doctype html>
+<title>CSS Test: @font-face from shadow applies to :host::before/::after.</title>
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<link rel="author" title="Alan Stearns" href="mailto:stearns@adobe.com">
+<link rel="help" href="https://drafts.csswg.org/css-scoping/#shadow-names">
+
+<style>
+#host {
+ float: left;
+}
+</style>
+<div id="host"></div>
+<script>
+test(function() {
+ host.attachShadow({ mode: "open" }).innerHTML = `
+ <style>
+ @font-face {
+ font-family: ff-16-wide;
+ src: url(/fonts/Ahem.ttf);
+ }
+ :host::before, :host::after {
+ font-family: ff-16-wide;
+ content: "12345"
+ }
+ </style>
+ <slot></slot>
+ `;
+
+ //shrinkwrapped size for a default font will be a bit more than 80-90
+ //if the font is applied, it will be a bit more than 160
+ assert_greater_than(document.getElementById('host').offsetWidth, 160);
+}, "@font-face from shadow applies to to :host::before/::after.");
+</script>