css/css-fonts/first-available-font-007.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>CSS-fonts: inline level box content height and first available font, missing U+0020</title>
<link rel="author" title="Florian Rivoal" href="https://florian.rivoal.net">
<link rel="help" href="https://drafts.csswg.org/css-fonts-3/#first-available-font">
<link rel="help" href="https://drafts.csswg.org/css-fonts-4/#first-available-font">
<link rel="match" href="first-available-font-005-ref.html">
<meta name="assert" content="The height of the content area of an inline-level depends only on the first available font, which is the first one to include U+0020.">
<style>
/* Two Arbitrary fonts with different metrics. One has a taller ascender, the other a deeper descender. */
@font-face {
  font-family: 'A-no-space';
  font-style: normal;
  font-weight: 400;
  src:  url(/fonts/Revalia.woff) format('woff');
  unicode-range: U+0061;
}
@font-face {
  font-family: 'B';
  font-style: normal;
  font-weight: 400;
  src: url(/fonts/AD.woff) format('woff');
}

div {
  font-size: 50px;
  display: inline-block;
  width: 40px;
  overflow: hidden;
}

span { color: transparent; }

div:nth-of-type(1) {
  font-family: B;
}
div:nth-of-type(1) span { background: red; }

/* The second div should have the same first available font as the first one, since A-no-space does no include U+0020.
   Both div's span's should thefore overflap exactly, with the white one hiding the red.
 */
div:nth-of-type(2) {
  font-family: A-no-space, B;
  margin-left: -40px;
}
div:nth-of-type(2) span { background: white; }
</style>

<p>Test passes if there is <strong>no red</strong> below.

<div><span>aaaaa</span></div><div><span>aaaaa</span></div>