css/css-values/ic-unit-014.html

<!DOCTYPE html>

<meta charset="utf-8">
<title>CSS Values and Units Test: support for the ic unit</title>
<link rel="author" title="Kiet Ho" href="mailto:tho22@apple.com">
<link rel="help" href="https://www.w3.org/TR/css-values-4/#ic">
<link rel="match" href="reference/ic-unit-014-ref.html">
<meta name="assert" content="The ic unit is equal to 0.5em if the CJK water glyph's advance is 0.5em.">
<style>
/* The following font contains the CJK water (U+6C34) glyph as a rectangle box,
   with the width being exactly half of its height. */
@font-face {
  font-family: IcTestHalfWidth;
  src: url(resources/IcTestHalfWidth.woff2);
}

.test {
    font-family: IcTestHalfWidth;
    font-size: 20px;
    width: calc(100px + 10ic);
    height: 20px;
    background: green;
    margin-bottom: 10px;
}

.ref {
    /*
    Each ic is equal to 10px, the width of a CJK water glyph.
    (its height is 20px, and its width is half the height).
    The width of .test is then:
        100px + (10ic * 10px / ic) = 200px
    */
    width: 200px;
    height: 20px;
    background: green;
}
</style>

<p>The test passes if there are two green rectangles of equal length.</p>
<div class="test"></div>
<div class="ref"></div>