<!DOCTYPE html>
<html>
<head>
<style media="screen and (min-width: 480px)">
</style>
</head>
<body>
<script src="../../resources/js-test-pre.js"></script>
<script>
description("Tests that MediaList.mediaText is not nullable and treats null as the empty string.");

var style = document.getElementsByTagName("style")[0];
var mediaList = style.sheet.media;
shouldBe("mediaList.__proto__", "MediaList.prototype");
shouldBe("mediaList.length", "1");

shouldBeEqualToString("mediaList.mediaText", "screen and (min-width: 480px)");
shouldNotThrow("mediaList.mediaText = null");
shouldBeEqualToString("mediaList.mediaText", "");
shouldNotThrow("mediaList.mediaText = 'screen and (min-width: 480px)'");
shouldBeEqualToString("mediaList.mediaText", "screen and (min-width: 480px)");
shouldNotThrow("style.removeAttribute('media')");
shouldBeEqualToString("mediaList.mediaText", "");
</script>
<script src="../../resources/js-test-post.js"></script>
</body>
</html>