public async Task RowHouseIsNotAddedIfItDoesExist() { const int postalCode = 20780; const string rowAddress = "Tampereentie 1 A"; _apartmentRepository.HasRowHouse(postalCode, rowAddress).Returns(true); await _registrationService.AddApartment("Heikkinen", $"{rowAddress} 13", postalCode); _apartmentRepository.DidNotReceive().AddRowHouse(Arg.Any <int>(), Arg.Any <string>()); }