gecko-dev/layout/style/test/test_visited_pref.html

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<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=147777
-->
<head>
<title>Test for visited link coloring pref Bug 147777</title>
<script type="application/javascript" src="/MochiKit/packed.js"></script>
<script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<style type="text/css">
:link { float: left; }
:visited { float: right; }
</style>
</head>
<body>
<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=147777">Mozilla Bug 147777</a>
<p id="display"><a id="mylink" href="test_visited_pref.html">link to this page</a></p>
<pre id="test">
<script type="application/javascript">
/** Test for Bug 147777 **/
// NOTE: this test will fail when ran by itself because the URL is different!
function reinsert_node(e) {
var sib = e.nextSibling;
var par = e.parentNode;
par.removeChild(e);
par.insertBefore(e, sib);
}
netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
var prefService = Components.classes["@mozilla.org/preferences-service;1"].
getService(Components.interfaces.nsIPrefService);
var dispBranch = prefService.getBranch("layout.css.");
function get_pref()
{
netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
return dispBranch.getBoolPref("visited_links_enabled");
}
function set_pref(val)
{
netscape.security.PrivilegeManager.enablePrivilege("UniversalXPConnect");
dispBranch.setBoolPref("visited_links_enabled", val);
}
is(get_pref(), true, "pref defaults to true");
// Link coloring is asynchronous (and non-deterministic), so we wait until it
// changes.
var thread = Components.classes["@mozilla.org/thread-manager;1"].
getService(Components.interfaces.nsIThreadManager).
mainThread;
var link = document.getElementById("mylink");
var cs;
var start = Date.now();
do {
while (thread.hasPendingEvents())
thread.processNextEvent(false);
cs = getComputedStyle(link, "");
} while(cs.cssFloat != "right");
var end = Date.now();
is(cs.cssFloat, "right", ":visited selector applies given default preferences");
set_pref(false);
// we don't handle dynamic changes of this pref; it only takes effect
// when a new page loads
reinsert_node(link);
// Wait a while to make sure we don't update the style on our reinserted node.
setTimeout(function() {
is(cs.cssFloat, "left", ":visited selector does not apply given false preference");
// Set the pref back for the rest of the tests.
set_pref(true);
SimpleTest.finish();
}, 10 * Math.max(end - start, 100));
SimpleTest.waitForExplicitFinish();
</script>
</pre>
</body>
</html>