<!DOCTYPE html>
<html>
<body>
<script src="/resources/js-test-pre.js"></script>
<script>
description("A frame without current history item should not prevent page caching.");
window.jsTestIsAsync = true;

if (window.testRunner)
    testRunner.overridePreference("WebKitUsesPageCachePreferenceKey", 1);

window.addEventListener("pageshow", function(event) {
    debug("pageshow - " + (event.persisted ? "" : "not ") + "from cache");

    if (event.persisted) {
        testPassed("Page did enter and was restored from the page cache");
        finishJSTest();
    }
}, false);

window.addEventListener("pagehide", function(event) {
    debug("pagehide - " + (event.persisted ? "" : "not ") + "entering cache");
    if (!event.persisted) {
        testFailed("Page did not enter the page cache.");
        finishJSTest();
    }
}, false);

window.addEventListener('load', function() {
    setTimeout(function() {
        // Force a back navigation back to this page.
        window.location.href = "resources/page-cache-helper.html";
    }, 0);
}, false);

</script>
<iframe src="http://"></iframe>
<script src="/resources/js-test-post.js"></script>
</body>
</html>