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<!DOCTYPE html>
<html>
    <head>
        <title>Test for Bug 1301290</title>
        <script src="/tests/SimpleTest/SimpleTest.js"></script>
        <script src="/tests/SimpleTest/EventUtils.js"></script>
        <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
        <style type="text/css">
            .blue, .green {
                border: none;
                box-sizing: border-box;
                display: block;
                width: 200px;
                height: 100px;
                overflow: scroll;
                resize: both;
            }

            .blue {
                background: blue;
            }

            .green {
                background: green;
                margin-top: -100px;
            }
        </style>
    </head>
    <body>
        <div class="blue"></div>
        <textarea class="green" id="textarea"></textarea>
        <script type="application/javascript">
            SimpleTest.waitForExplicitFinish();
            addLoadEvent(() => SimpleTest.executeSoon(function() {
                var textarea = $("textarea");
                var rect = textarea.getBoundingClientRect();

                synthesizeMouse(textarea, rect.width - 9,  rect.height - 9,  { type: "mousedown" });
                synthesizeMouse(textarea, rect.width + 40, rect.height + 40, { type: "mousemove" });
                synthesizeMouse(textarea, rect.width + 40, rect.height + 40, { type: "mouseup" });

                var newrect = textarea.getBoundingClientRect();
                ok(newrect.width > rect.width, "width did not increase");
                ok(newrect.height > rect.height, "height did not increase");
                SimpleTest.finish();
            }));
        </script>
    </body>
</html>