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+<!DOCTYPE html>
+<html lang="en" >
+<head>
+<meta charset="utf-8">
+<title>shaping: isolation, bdi</title>
+<meta name="assert" content="Shaping MUST be broken across inline box boundaries when isolation occurs.">
+<link rel="author" title="Richard Ishida" href="mailto:ishida@w3.org">
+<link rel="help" href="https://drafts.csswg.org/css-text/#boundary-shaping">
+<link rel="match" href="reference/shaping-012-ref.html">
+<style type="text/css">
+@font-face {
+ font-family: 'csstest_noto';
+ src: url('/fonts/noto/NotoNaskhArabic-regular.woff2') format('woff2');
+ }
+.test, .ref { border: 1px solid #02D7F6; margin: 20px; padding: 10px; width: 3em; font-size: 120px; font-family: "csstest_noto"; }
+/* the CSS above is not part of the test */
+</style>
+</head>
+<body>
+<p class="instructions">Test passes if the three Arabic characters in each box DON'T join, making the two boxes identical.</p>
+
+<div class="test" lang="ar" dir="rtl">ع<bdi>ع</bdi>ع</div>
+<div class="ref" lang="ar" dir="rtl">ع&zwnj;<bdi>&zwnj;ع&zwnj;</bdi>&zwnj;ع</div>
+<!-- Notes:
+This test only works if bdi is supported by the browser.
+This test uses the Noto Naskh Arabic font to control variables related to font choice.
+-->
+</body>
+</html>