<!DOCTYPE html>
<html>
<body>
<script src="../../../resources/js-test-pre.js"></script>
<script>
if (window.testRunner)
    testRunner.overridePreference("WebKitUsesPageCachePreferenceKey", 1);

window.addEventListener("pageshow", function(event) {
    if (!window.sessionStorage.didStartPageCacheWindowWithOpenerTest) {
        if (event.persisted)
            window.opener.testFailed("page was restored from the page cache.");
        else
            window.opener.testPassed("page was not restored from the page cache.");
        return;
    }

    delete window.sessionStorage.didStartPageCacheWindowWithOpenerTest;

    if (event.persisted)
        window.opener.testPassed("page was restored from the page cache.");
    else
        window.opener.testFailed("page was not restored from the page cache.");

    window.opener.finishJSTest();
}, false);

window.addEventListener("pagehide", function(event) {
    if (event.persisted)
        window.opener.testPassed("page was saved to the page cache.");
    else
        window.opener.testFailed("page was not saved to the page cache.");
}, false);

window.addEventListener('load', function() {
    setTimeout(function() {
        // Force a back navigation back to this page.
        window.sessionStorage.didStartPageCacheWindowWithOpenerTest = true;
        window.location.href = "page-cache-helper.html";
    }, 0);
}, false);
</script>
<script src="../../../resources/js-test-post.js"></script>
</body>
</html>