public void EscreverF600()
        {
            var regF600 = new BlocoF.RegistroF600();

            regF600.Cnpj = "00394460005887"; // CNPJ da Receita Federal do Brasil (Filial de Brasília)

            var result = regF600.EscreverCampos(new DateTime(DateTime.Now.Year, DateTime.Now.Month, 1));
        }
        public void EscreverF600()
        {
            var regF600 = new BlocoF.RegistroF600();

            regF600.IndNatRet = 3;
            regF600.DtRet     = DateTime.Today;
            regF600.Cnpj      = "00394460005887"; // CNPJ da Receita Federal do Brasil (Filial de Brasília)

            var todayToString = DateTime.Today.ToShortDateString().Replace("/", string.Empty);
            var expected      = string.Format("|F600|03|{0}|0,0000|0,00|||00394460005887|0,00|0,00|0|", todayToString);

            var result = regF600.EscreverCampos(true);

            Assert.AreEqual(expected, result);
        }