1 files changed, 46 insertions, 0 deletions
diff --git a/layout/inspector/tests/test_bug536379.html b/layout/inspector/tests/test_bug536379.html
new file mode 100644
index 000000000..8ac012953
--- /dev/null
+++ b/layout/inspector/tests/test_bug536379.html
@@ -0,0 +1,46 @@
+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=536379
+-->
+<head>
+  <title>Test for Bug 536379</title>
+  <script type="application/javascript" 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;
+
+var domUtils =
+  CC["@mozilla.org/inspector/dom-utils;1"].getService(CI.inIDOMUtils);
+var rules = domUtils.getCSSStyleRules(document.getElementById("display"));
+var firstPRule =
+  rules.GetElementAt(rules.Count() - 2).QueryInterface(CI.nsIDOMCSSStyleRule);
+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.GetElementAt(rules.Count() - 1).QueryInterface(CI.nsIDOMCSSStyleRule);
+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>