public void SiAgregoUnShowExistenteObtengoUnError()
        {
            var show = CrearShow("show");

            repository.AddShow(show);
            try
            {
                repository.AddShow(show);
            }
            catch (Exception ex)
            {
                Assert.AreEqual(ex.Message, ESRepositorio.SHOW_CREATE_ALREADY_EXISTS_EXCEPTION);
            }
        }