LayoutTests/animations/restart-after-scroll.html

<meta name="viewport" content="width=device-width,initial-scale=1,user-scalable=no">
<style>
@-webkit-keyframes bounce {
    from {
        -webkit-transform: translate3d(0,0,0);
    }
    to {
        -webkit-transform: translate3d(200px,0,0);
    }
}

#animator {
    position: relative;
    top: 0px;
    width: 100px;
    height: 100px;
    background-color: blue;
    -webkit-animation-name: bounce;
    -webkit-animation-duration: 100ms;
    -webkit-animation-iteration-count: infinite;
}
</style>
<script>
var hasScrolled = false;

function sawIteration(event) {
    if (hasScrolled) {
        document.getElementById("results").innerText = "PASS: Saw iteration after scrolling";
        testRunner.notifyDone();
    }
}

async function startScroll() {
    if (window.eventSender) {
        await eventSender.asyncMouseMoveTo(200, 200);
        await eventSender.asyncMouseDown();
        await eventSender.asyncMouseMoveTo(200, 300);
        setTimeout(endScroll, 100);
    }
}

async function endScroll() {
    await eventSender.asyncMouseUp();
    hasScrolled = true;
}

function startTest() {
    var animator = document.getElementById("animator");
    animator.addEventListener("webkitAnimationIteration", sawIteration, false);
    setTimeout(startScroll, 100);
}

if (window.testRunner) {
    testRunner.waitUntilDone();
    testRunner.dumpAsText();
}

window.addEventListener("load", startTest, false);
</script>
<div id="animator"></div>
<div id="results"></div>