it("should show preview of valid hsl/hsla colors", function () {
                runs(function () {
                    checkColorAtPos("hsl(0, 100%, 50%)",       31, 22);
                    checkColorAtPos("hsla(0, 100%, 50%, 0.5)", 32, 23);
                    checkColorAtPos("hsla(0, 100%, 50%, .5)",  33, 23);