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Test Info:

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<head>
<title>CSS Test: Principal block box establishes the containing block for generated content</title>
<link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
<link rel="reviewer" title="GĂ©rard Talbot" href="http://www.gtalbot.org/BrowserBugsSection/css21testsuite/" /> <!-- 2012-03-11 -->
<link rel="match" href="containing-block-029-ref.xht" />
<meta name="assert" content="Principal block boxes establish a containing block for generated content." />
<style type="text/css">
div
{
background: blue;
height: 1in;
position: absolute;
width: 1in;
}
div div:before
{
content: ".";
background: orange;
bottom: 0;
display: block;
height: 0.25in;
position: absolute;
right: 0;
width: 0.25in;
}
</style>
</head>
<body>
<p>Test passes if a small orange square (with a black dot in its middle) is in the bottom right corner of the blue square.</p>
<div>
<div></div>
</div>
</body>
</html>