css/css-text/shaping/shaping-arabic-diacritics-001.html

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="utf-8">
<title>shaping: Arabic diacritics on NBSP</title>
<meta name="assert" content="Shaping must work for diacritics rendered on NBSP as base">
<link rel="author" title="Jonathan Kew" href="mailto:jkew@mozilla.com">
<link rel="help" href="https://www.unicode.org/versions/Unicode13.0.0/ch02.pdf">
<link rel="help" href="https://www.unicode.org/reports/tr53/">
<link rel="match" href="reference/shaping-arabic-diacritics-001-ref.html">
<meta name="fuzzy" content="maxDifference=0-1; totalPixels=0-2">
<style type="text/css">
@font-face {
    font-family: ArabicTest;
    src: url('/fonts/noto/NotoNaskhArabic-regular.woff2') format('woff2');
}
.test {
    font: 120px/2 ArabicTest, sans-serif;
}
</style>
</head>
<body>
    <p class="instructions">Test passes if the two lines are rendered identically,
        with the superscript alef (&#x627;) directly above the raised hamza (&#x621;).</p>
    <!-- The Arabic characters here are ARABIC HAMZA ABOVE and ARABIC LETTER
         SUPERSCRIPT ALEF, and according to UTR53 should always be sorted
         as <hamza,alef> for rendering regardless of underlying order. -->
    <div class=test>a<span dir=rtl>&nbsp;&#x654;&#x670;</span>z</div>
    <div class=test>a<span dir=rtl>&nbsp;&#x670;&#x654;</span>z</div>
</body>
</html>