<html>
<head>
<script src="../resources/js-test.js"></script>
<script>
var jsTestIsAsync = true;
var state = "initial";

function startTest() {
    // Wait for after the load event so the frame gets a new history when navigated.
    setTimeout(continueTest, 0);
}

function continueTest() {
    switch (state) {
    case "initial":
        state = "loading-plugin";
        var frame = document.querySelector("iframe");
        frame.addEventListener("load", continueTest);
        frame.src = "data:application/x-blink-test-plugin,";
        break;
    case "loading-plugin":
        state = "moving-backward";
        history.back();
        break;
    case "moving-backward":
        state = "moving-forward";
        history.forward();
        break;
    case "moving-forward":
        state = "done";
        finishJSTest();
        break;
    default:
        alert('FAIL');
        break;
    }
}
</script>
</head>
<body onload="startTest()">
<iframe src="data:text/html,Waiting..."></iframe>
</body>
</html>