gecko-dev/layout/inspector/tests/test_parseStyleSheet.html

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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=1195978
-->
<head>
<title>Test for Bug 1195978</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<style>
body {
color: red;
}
</style>
</head>
<body>
<script type="application/javascript">
const InspectorUtils = SpecialPowers.InspectorUtils;
var sheet = document.styleSheets[1];
is(InspectorUtils.getRelativeRuleLine(sheet.cssRules[0]), 2,
"initial relative rule line");
is(InspectorUtils.getRuleLine(sheet.cssRules[0]), 11,
"initial rule line");
InspectorUtils.parseStyleSheet(sheet, "\nbody {\n color: blue;\n}\n");
is(InspectorUtils.getRelativeRuleLine(sheet.cssRules[0]), 2,
"relative rule line after reparsing");
is(InspectorUtils.getRuleLine(sheet.cssRules[0]), 11,
"relative rule line after reparsing");
</script>
</body>
</html>