wpt/css/css-backgrounds/background-size-with-negative-value.html at master · web-platform-tests/wpt · GitHub

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<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8">
    <title>CSS Backgrounds and Borders Test: background-size - negative value</title>
    <link rel="author" title="Zhuoyu Qian" href="mailto:zhuoyu.qian@samsung.com">
    <link rel="help" href="http://www.w3.org/TR/css3-background/#the-background-size" title="3.9. Sizing Images: the 'background-size' property">
    <link rel="match" href="reference/background-size-002-ref.html">
    <meta name="flags" content="image">
    <meta name="assert" content="Check if 'background-size' has the negative values, then such values are not allowed and they will be assumed to be 'auto'.">
    <style>
        #ref-overlapped-red {
            background-color: red;
            height: 45px;
            width: 45px;
        }
        #test-overlapping-green {
            background-image: url(support/60x60-green.png);
            background-repeat: no-repeat;
            background-size: -1px -1px;
            bottom: 45px;
            height: 100px;
            position: relative;
            width: 100px;
        }
    </style>
  </head>
  <body>
    <p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
    <div id="ref-overlapped-red"></div>
    <div id="test-overlapping-green"></div>
  </body>
</html>