css21/normal-flow/min-height-067.xht

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<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title>CSS Test: Min-height using 'em' units with a minimum minus one value, -1em</title>
        <link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
        <link rel="reviewer" title="Gérard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> <!-- 2012-10-30 -->
        <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#propdef-min-height" />
        <link rel="help" href="http://www.w3.org/TR/CSS21/visudet.html#min-max-heights" />
        <link rel="match" href="min-height-067-ref.xht" />

        <meta name="flags" content="ahem invalid" />
        <meta name="assert" content="The 'min-height' property sets a minimum minus one length value in 'em' units." />
        <style type="text/css">
            div
            {
                background: red;
                font: 20px/1 Ahem;
                height: 0;
                min-height: -1em;
            }
        </style>
    </head>
    <body>
        <p>Test passes if there is <strong>no red</strong>.</p>
        <div>Filler Text</div>
    </body>
</html>