public void SetUp()
 {
     _giftAidCalculator = Substitute.For <IGiftAidCalculator>();
     _giftAidRepository = Substitute.For <IGiftAidRepository>();
     _postCodeValidator = Substitute.For <IPostCodeValidator>();
     _postCodeValidator.Validate(Arg.Any <string>())
     .Returns(new PostCodeValidationResponse {
         result = true, status = 200
     });
 }
 public GiftAidController(IGiftAidCalculator giftAidCalculator, IGiftAidRepository giftAidRepository, IPostCodeValidator postCodeValidator)
 {
     _giftAidCalculator = giftAidCalculator;
     _giftAidRepository = giftAidRepository;
     _postCodeValidator = postCodeValidator;
 }