test_bug536379.html

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<!DOCTYPE HTML>

<html>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=536379

-->

<head>

  <title>Test for Bug 536379</title>

  <script src="/tests/SimpleTest/SimpleTest.js"></script>

  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>

  <link rel="stylesheet" type="text/css" href="data:text/css,p { color: green }">

  <link rel="stylesheet" type="text/css" href="data:text/css,p { color: green }">

</head>

<body>

<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=536379">Mozilla Bug 536379</a>

<p id="display"></p>

<pre id="test">

<script type="application/javascript">

/** Test for Bug 536379 **/

const CI = SpecialPowers.Ci;

const CC = SpecialPowers.Cc;

const InspectorUtils = SpecialPowers.InspectorUtils;

var rules = InspectorUtils.getMatchingCSSRules(document.getElementById("display"));

var firstPRule = rules[rules.length - 2];

firstPRule.style.removeProperty("color");

ok(true, "should not crash");

var links = document.getElementsByTagName("link");

is(links.length, 3, "links.length");

is(SpecialPowers.unwrap(firstPRule.parentStyleSheet), links[1].sheet, "sheet match for first P rule");

var secondPRule = rules[rules.length - 1];

is(SpecialPowers.unwrap(secondPRule.parentStyleSheet), links[2].sheet, "sheet match for second P rule");

is(links[1].href, links[2].href, "links should have same href");

isnot(links[1].sheet, links[2].sheet, "links should have different sheets");

isnot(firstPRule, secondPRule, "rules should be different");

isnot(firstPRule.cssText, secondPRule.cssText, "text should be different since property was removed from one");

</script>

</pre>

</body>

</html>