<!-- webkit-test-runner [ UsesBackForwardCache=true ] -->
<!DOCTYPE html>
<html>
<body>
<script src="../../resources/js-test.js"></script>
<script>
description('Tests that a page with a running GPUCanvasContext goes into the back/forward cache.');
window.jsTestIsAsync = true;

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

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

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

window.addEventListener('load', function() {
    context = document.createElement("canvas").getContext("gpu");

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