ess({left: true}, 500);
							robot.mouseMoveAt("main-trailing_splitter", 500, 100,
								size.w/2 + (geom.isBodyLtr() ? -100 : 100), size.h/2);
							robot.mouseRelease({left: true}, 500);
							robot.sequence(d.getTestCallback(function(){
								var nTop = geom.position(dom.byId("main-top")),
									nCenter = geom.position(dom.byId("main-center")),
									nRight = geom.position(dom.byId("main-trailing")),
									nBottom = geom.position(dom.byId("main-bottom"));

								doh.t(bcTest.within(oRi