jquery-ui/tests/unit/selectable/selectable_core.js

/*
 * selectable_core.js
 */

TestHelpers.selectable = {
	drag: function drag(el, dx, dy) {
		var off = el.offset(),
			pos = { clientX: off.left, clientY: off.top };
		el.simulate("mousedown", pos);
		$(document).simulate("mousemove", pos);
		pos.clientX += dx;
		pos.clientY += dy;
		$(document).simulate("mousemove", pos);
		$(document).simulate("mouseup", pos);
	}
};