LayoutTests/fast/css/resize-rtl.html

<style>
    div {
        width: 50px;
        height: 50px;
        overflow: hidden;
        box-sizing: border-box;
        border: solid;
        margin: 10px;
        resize: both;
    }
</style>

<pre id="console"></pre>
<div id="target" dir="rtl"></div>

<script type="text/javascript">
    var mouseX = 0;
    var mouseY = 0;

    function log(message)
    {
        document.getElementById("console").appendChild(document.createTextNode(message + "\n"));
    }

    async function beginResize(target)
    {
        var x = document.body.offsetLeft + target.offsetLeft;
        var y = document.body.offsetTop + target.offsetTop + target.offsetHeight;

        mouseX = x + 6;
        mouseY = y - 6;

        await eventSender.asyncMouseMoveTo(mouseX, mouseY);
        await eventSender.asyncMouseDown();
    }

    async function endResize()
    {
        await eventSender.asyncMouseUp();
    }

    async function resize(deltaX, deltaY)
    {
        mouseX += deltaX;
        mouseY += deltaY;

        await eventSender.asyncMouseMoveTo(mouseX, mouseY);
    }

    function assertSize(target, width, height)
    {
        var computedStyle = getComputedStyle(target);
        var actualWidth = computedStyle.width;
        var actualHeight = computedStyle.height;

        if (actualWidth === width && actualHeight === height)
            log("'" + target.id + "' resized as expected to (" + width + ", " + height + ").");
        else
            log("FAIL: '" + target.id + "' resized to (" + actualWidth + ", " + actualHeight + ") instead of (" + width + ", " + height + ").");
    }

    onload = async () => {
        if (window.testRunner) {
            testRunner.dumpAsText();
            testRunner.waitUntilDone();

            var target = document.getElementById("target");

            await beginResize(target);
            await resize(0, 50);
            await endResize();

            assertSize(target, "50px", "100px");

            await beginResize(target);
            await resize(-5, 50);
            await endResize();

            assertSize(target, "55px", "150px");

            await beginResize(target);
            await resize(5, -50);
            await endResize();

            assertSize(target, "50px", "100px");

            await beginResize(target);
            await resize(-5, 0);
            await resize(0, 10);
            await resize(0, 10);
            await resize(0, 10);
            await resize(0, 10);
            await resize(0, 10);
            await endResize();

            assertSize(target, "55px", "150px");

            await beginResize(target);
            await resize(-5, -160);
            await resize(5, 10);
            await endResize();

            assertSize(target, "55px", "15px");
            testRunner.notifyDone();
        }
    }
</script>