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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=716226
+-->
+<head>
+ <meta charset="utf-8">
+ <title>Test for Bug 716226</title>
+ <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+ <style id="s">
+ @keyframes foo { }
+ </style>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=716226">Mozilla Bug 716226</a>
+<p id="display"></p>
+<div id="content" style="display: none">
+
+</div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 716226 **/
+var sheet = $("s").sheet;
+var rules = sheet.cssRules;
+is(rules.length, 1, "Should have one keyframes rule");
+var keyframesRule = rules[0];
+var keyframeRules = keyframesRule.cssRules;
+is(keyframeRules.length, 0, "Should have no keyframe rules yet");
+
+keyframesRule.appendRule('0% { }');
+is(keyframeRules.length, 1, "Should have a keyframe rule now");
+var keyframeRule = keyframeRules[0];
+is(keyframeRule.parentRule, keyframesRule,
+ "Parent of keyframe should be keyframes");
+is(keyframeRule.parentStyleSheet, sheet,
+ "Parent stylesheet of keyframe should be our sheet");
+
+is(keyframeRule.style.cssText, "", "Should have no declarations yet");
+// Note: purposefully non-canonical cssText string so we can make sure we
+// really invoked the CSS parser and serializer.
+keyframeRule.style.cssText = "color:green";
+is(keyframeRule.style.cssText, "color: green;",
+ "Should have the declarations we set now");
+
+
+
+</script>
+</pre>
+</body>
+</html>