it("should NOT show preview of unsupported hsl/hsla colors", function () {
                runs(function () {
                    expectNoPreviewAtPos(38, 25);    // cursor on hsla(90, 100%, 50%, 2)
                    expectNoPreviewAtPos(39, 24);    // cursor on hsla(0, 200%, 50%, 0.5)
                    expectNoPreviewAtPos(40, 25);    // cursor on hsla(0.0, 100%, 50%, .5)