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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="/tests/SimpleTest/SimpleTest.js"></script>
+ <script type="application/javascript" src="/tests/SimpleTest/WindowSnapshot.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>
+<iframe id="iframe" src="visited-pref-iframe.html" style="width: 10em; height: 5em"></iframe>
+<pre id="test">
+<script type="application/javascript">
+/** Test for Bug 147777 **/
+
+function reinsert_node(e) {
+ var sib = e.nextSibling;
+ var par = e.parentNode;
+ par.removeChild(e);
+ par.insertBefore(e, sib);
+}
+
+function get_pref()
+{
+ return SpecialPowers.getBoolPref("layout.css.visited_links_enabled");
+}
+
+function snapshotsEqual(snap1, snap2)
+{
+ return compareSnapshots(snap1, snap2, true)[0];
+}
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestFlakyTimeout("untriaged");
+window.addEventListener("load", step1, false);
+
+var iframe, subdoc, subwin;
+var link;
+var start;
+var timeout;
+
+var unvisref; // reference image for unvisited style
+
+function step1()
+{
+ is(get_pref(), true, "pref defaults to true");
+
+ iframe = document.getElementById("iframe");
+ subdoc = iframe.contentDocument;
+ subwin = iframe.contentWindow;
+ link = subdoc.getElementById("link");
+
+ unvisref = snapshotWindow(subwin, false);
+
+ // Now set the href of the link to a location that's actually visited.
+ link.href = window.location;
+
+ start = Date.now();
+
+ // And wait for the link to get restyled when the history lets us
+ // know it is (asynchronously).
+ setTimeout(poll_for_visited_style, 100);
+}
+
+function poll_for_visited_style()
+{
+ var snapshot = snapshotWindow(subwin, false);
+ if (snapshotsEqual(unvisref, snapshot)) {
+ // hasn't been styled yet
+ setTimeout(poll_for_visited_style, 100);
+
+ // If it never gets styled correctly, this test will fail because
+ // this loop will never complete.
+ } else {
+ var end = Date.now();
+ timeout = 3 * Math.max(end - start, 300);
+ SpecialPowers.pushPrefEnv({"set":[["layout.css.visited_links_enabled", false]]}, step2);
+ }
+}
+
+function step2()
+{
+ // we don't handle dynamic changes of this pref; it only takes effect
+ // when a new page loads
+ reinsert_node(link);
+
+ setTimeout(step3, timeout);
+}
+
+function step3()
+{
+ var snapshot = snapshotWindow(subwin, false);
+ ok(snapshotsEqual(unvisref, snapshot),
+ ":visited selector does not apply given false preference");
+
+ SimpleTest.finish();
+}
+
+</script>
+</pre>
+</body>
+</html>