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diff --git a/docshell/test/mochitest/test_bug680257.html b/docshell/test/mochitest/test_bug680257.html
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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=680257
+-->
+<head>
+ <title>Test for Bug 680257</title>
+ <script src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=680257">Mozilla Bug 680257</a>
+
+<script type="application/javascript">
+
+SimpleTest.waitForExplicitFinish();
+
+var popup = window.open("file_bug680257.html");
+
+var gTestContinuation = null;
+function continueAsync() {
+ popup.addEventListener("hashchange",
+ function(e) { gTestContinuation.next(); }, { once: true });
+}
+
+// The popup will call into popupLoaded() once it loads.
+function popupLoaded() {
+ // runTests() needs to be called from outside popupLoaded's onload handler.
+ // Otherwise, the navigations we do in runTests won't create new SHEntries.
+ SimpleTest.executeSoon(function() {
+ if (!gTestContinuation) {
+ gTestContinuation = runTests();
+ }
+ gTestContinuation.next();
+ });
+}
+
+function* runTests() {
+ checkPopupLinkStyle(false, "Initial");
+
+ popup.location.hash = "a";
+ continueAsync();
+ yield;
+ checkPopupLinkStyle(true, "After setting hash");
+
+ popup.history.back();
+ continueAsync();
+ yield;
+
+ checkPopupLinkStyle(false, "After going back");
+
+ popup.history.forward();
+ continueAsync();
+ yield;
+ checkPopupLinkStyle(true, "After going forward");
+
+ popup.close();
+ SimpleTest.finish();
+}
+
+function checkPopupLinkStyle(isTarget, desc) {
+ var link = popup.document.getElementById("a");
+ var style = popup.getComputedStyle(link);
+ var color = style.getPropertyValue("color");
+
+ // Color is red if isTarget, black otherwise.
+ if (isTarget) {
+ is(color, "rgb(255, 0, 0)", desc);
+ } else {
+ is(color, "rgb(0, 0, 0)", desc);
+ }
+}
+
+</script>
+</body>
+</html>