public async Task InsertReservationTest()
        {
            var kunde = _kundeClient.GetKunde(new GetKundeRequest {
                IdFilter = 1
            });

            var autoToInsert = new AutoDto
            {
                Marke = "Skoda Octavia", Tagestarif = 50, AutoKlasse = AutoKlasse.Mittelklasse
            };
            var auto = _autoClient.InsertAuto(autoToInsert);

            var reservationToInsert = new ReservationDto
            {
                Bis = _bis, Von = _von, Kunde = kunde, Auto = auto
            };
            var insertResponse = await _target.InsertReservationAsync(reservationToInsert);

            var getResponse = await _target.GetReservationByIdAsync(new GetReservationRequest { IdFilter = insertResponse.ReservationsNr });

            Assert.Equal(reservationToInsert.Von, getResponse.Von);
            Assert.Equal(reservationToInsert.Bis, getResponse.Bis);
            Assert.Equal(reservationToInsert.Auto, getResponse.Auto);
            Assert.Equal(reservationToInsert.Kunde, getResponse.Kunde);
        }