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<title>Test for Bug 478160</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<style id="style" type="text/css"></style>
<a target="_blank" href="">Mozilla Bug 478160</a>
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<pre id="test">
<script type="application/javascript">
/** Test for Bug 478160 **/
var style_element = document.getElementById("style");
var style_text = document.createTextNode("");
function test_at_rule(str) { = str;
is(style_element.sheet.cssRules.length, 1,
"should have one rule from " + str);
var ser1 = style_element.sheet.cssRules[0].cssText;
isnot(ser1, "", "should have non-empty rule from " + str); = ser1;
var ser2 = style_element.sheet.cssRules[0].cssText;
is(ser2, ser1, "parse+serialize should be idempotent for " + str);
test_at_rule("@namespace 'a b'");