mozilla-release/layout/reftests/text/lineheight-metrics-2a.html

<title>Testcase, bug 947650 and 598900</title>
<style>
html { background: white; }
@font-face {
   font-family: "MarkA-lineheight6000-typolineheight2700";
   src: url(../fonts/markA-lineheight6000-typolineheight2700.otf);
}
body {
   padding: 1px;
   background: blue;
   width: 100px;
   height: 27px;
   font-size: 0px; /* remove the effect of the strut ascent and descent */
}
div {
   background: aqua;
}
span {
  /* Choose 10px so that all the metrics are integers and we avoid rounding
     issues. See lineheight-metrics-1.html for a test with non-integer values.
   */
   color: transparent;
   font-family: MarkA-lineheight6000-typolineheight2700;
   font-size: 10px;
}
</style>
<body>
<div><span>A</span></div>
</body>