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<html>
<head>
<style type="text/css">
.pass { color: green; }
.fail { color: red; }
</style>
<style type="text/css">
.foo { color: black; }
@media screen {
.bar { color: blue; }
}
@keyframes name { }
@page { }
</style>
<!-- @charset must be the first rule per spec, and additionally
with no leading whitespace per our parser. -->
<style>@charset "UTF-8";</style>
<script>
function printOut(msg) {
var console = document.getElementById("console");
var span = document.createElement('span');
span.innerHTML = msg + '<br>';
console.appendChild(span);
}
function resultStringifier(result)
{
if (result === "")
return "<b>the empty string</b>";
else if (result === undefined)
return "<b>undefined</b>";
else if (result === null)
return "<b>null</b>";
return "the string '" + result + "'";
}
function nullTestElementAttribute(elementType, element, attr, expected)
{
element[attr] = null;
var result;
if (element[attr] === expected)
result = "<span class='pass'>TEST SUCCEEDED:</span> The value was " + resultStringifier(expected) + ".";
else
result = "<span class='fail'>TEST FAILED:</span> The value should have been " + resultStringifier(expected) + " but was " + resultStringifier(element[attr]) + ".";
result += " [tested " + elementType + "." + attr + "]";
printOut(result);
}
function runTests() {
if (window.testRunner)
testRunner.dumpAsText();
var rules = document.styleSheets[1].cssRules;
var rule = rules[0];
var mediaRule = rules[1];
var keyframesRule = rules[2];
var pageRule = rules[3];
var charsetRule = document.styleSheets[2].cssRules[0];
var style = rule.style;
var mediaList = mediaRule.media;
var listing = [
{
type: 'CSSRule',
elementToUse: rule,
attributes: [
// 'null' is not a valid rule, so the setter does nothing.
{name: 'cssText', expectedNull: '.foo { color: black; }'}
]
},
{
type: 'CSSCharsetRule',
elementToUse: charsetRule,
attributes: [
{name: 'encoding', expectedNull: 'null'}
]
},
{
type: 'CSSKeyframesRule',
elementToUse: keyframesRule,
attributes: [
{name: 'name', expectedNull: 'null'}
]
},
{
type: 'CSSPageRule',
elementToUse: pageRule,
attributes: [
{name: 'selectorText', expectedNull: '@page null'}
]
},
{
type: 'CSSStyleRule',
elementToUse: rule,
attributes: [
{name: 'selectorText', expectedNull: 'null'}
]
},
{
type: 'CSSStyleDeclaration',
elementToUse: style,
attributes: [
// cssText detects syntax errors, such as JS null, and sets the value to the empty string.
{name: 'cssText', expectedNull: ''}
]
},
{
type: 'MediaList',
elementToUse: mediaList,
attributes: [
{name: 'mediaText', expectedNull: ''}
]
}
];
for (element in listing) {
var type = listing[element].type;
var elementToUse = listing[element].elementToUse;
var attrs = listing[element].attributes;
for (attr in attrs) {
nullTestElementAttribute(type, elementToUse, attrs[attr].name, attrs[attr].expectedNull);
}
printOut('');
}
}
</script>
</head>
<body onload="runTests()">
<p>This test setting various attributes of a CSSOM elements to JavaScript null.</p>
<div id="console"></div>
</body>
</html>
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