chromium/third_party/blink/web_tests/external/wpt/css/css-backgrounds/background-size-003.html

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
    <head>
        <title>CSS Test: Value of 'auto' is used for y dimension in 'background-size'</title>
        <link rel="author" title="Microsoft" href="http://www.microsoft.com/" />
        <link rel="help" href="http://www.w3.org/TR/css3-background/#the-background-size" />
        <meta name="assert" content="An 'auto' value for y dimension in 'background-size' is resolved by using the image's intrinsic ratio and the size provided for the x dimension." />
        <style type="text/css">
            .test
            {
                width: 100px;
                height: 100px;
                background-repeat: no-repeat;
                background-image: url("support/red_color.png");
                background-size: 50px auto;
            }
            .reference
            {
                margin-top: -100px;
                background: black;
                width: 50px;
                height: 50px;
            }
        </style>
        </head>
    <body>
        <p>Test passes if there is no red visible on the page.</p>
        <div class="test"></div>
        <div class="reference"></div>
    </body>
</html>