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<!DOCTYPE html>
<html>
<head>
<title>CSS Test: CSSOM MediaList Interfaces</title>
<link rel="author" title="Chapman Shoop" href="mailto:chapman.shoop@gmail.com">
<link rel="help" href="http://www.w3.org/TR/cssom-1/#the-medialist-interface">
<meta name="flags" content="dom">
<meta name="assert" content="MediaList object has appendMedium method and it functions properly.">
<script src="/resources/testharness.js" type="text/javascript"></script>
<script src="/resources/testharnessreport.js" type="text/javascript"></script>
</head>
<body>
<noscript>Test not run - javascript required.</noscript>
<div id="log"></div>
<script type="text/javascript">
function setup() {
// Clean out any old style element
var old_style_el = document.getElementById('test_style');
if (old_style_el) {
document.head.removeChild(old_style_el);
}
// Create a fresh style element and return its media attribute
var style_el = document.createElement('style');
style_el.setAttribute('id', 'test_style');
document.head.appendChild(style_el);
return style_el.sheet.media;
}
</script>
<script type="text/javascript">
// MediaList.appendMedium correctly adds medium to empty MediaList.
test(function() {
media_list = setup();
media_list.appendMedium("all");
assert_equals(media_list.length, 1);
assert_equals(media_list.item(0), "all");
assert_equals(media_list.mediaText, "all");
}, "appendMedium_correctly_appends_medium_to_empty_MediaList");
// MediaList.appendMedium correctly adds medium to a MediaList that already has a medium.
test(function() {
media_list = setup();
media_list.appendMedium("screen");
media_list.appendMedium("all");
// The ordering of array items should be different from that of the mediaText element.
// "all" should be appended after "screen" in the array, but "mediaText" should be
// "all, screen" due to lexicographical sorting.
assert_equals(media_list.length, 2);
assert_equals(media_list.item(0), "screen");
assert_equals(media_list.item(1), "all");
assert_equals(media_list.mediaText, "screen, all");
}, "appendMedium_correctly_appends_medium_to_nonempty_MediaList");
</script>
</body>
</html>
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