public async Task Stamp_Test_StampV4XMLV4byTokenAsync() { var build = new BuildSettings(); StampV4 stamp = new StampV4(build.Url, build.Token); var xml = GetXml(build); var response = (StampResponseV4)await stamp.TimbrarV4Async(xml, "*****@*****.**"); Assert.True(response.data != null, "El resultado data viene vacio."); Assert.True(!string.IsNullOrEmpty(response.data.cfdi), "El resultado data.cfdi viene vacio."); response = (StampResponseV4)await stamp.TimbrarV4Async(xml, "*****@*****.**"); Assert.True(response.status == "error" && response.message == "307. El comprobante contiene un timbre previo."); }