mozilla-release/layout/style/test/test_setPropertyWithNull.html

<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=830260
-->
<head>
  <meta charset="utf-8">
  <title>Test for Bug 830260</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
  <script type="application/javascript">

  /** Test for Bug 830260 **/
    var div = document.createElement("div");
    div.style.color = "green";
    div.style.color = "null";
    is(div.style.color, "green", 'Assigning "null" as a color should not parse');
    div.style.setProperty("color", "null");
    is(div.style.color, "green",
       'Passing "null" as a color to setProperty should not parse');

    div.style.setProperty("color", null);
    is(div.style.color, "",
       'Passing null as a color to setProperty should remove the property');

    div.style.color = "green";
    is(div.style.color, "green", 'Assigning "green" as a color should parse');

    div.style.color = null;
    is(div.style.color, "",
       'Assigning null as a color should remove the property');


  </script>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=830260">Mozilla Bug 830260</a>
<p id="display"></p>
<div id="content" style="display: none">

</div>
<pre id="test">
</pre>
</body>
</html>