public void Should_have_error_when_friendEmail_is_null_or_empty()
        {
            var model = new WishlistEmailAFriendModel();

            model.FriendEmail = null;
            _validator.ShouldHaveValidationErrorFor(x => x.FriendEmail, model);
            model.FriendEmail = "";
            _validator.ShouldHaveValidationErrorFor(x => x.FriendEmail, model);
        }
        public void ShouldHaveErrorWhenFriendEmailIsNullOrEmpty()
        {
            var model = new WishlistEmailAFriendModel
            {
                FriendEmail = null
            };

            _validator.ShouldHaveValidationErrorFor(x => x.FriendEmail, model);
            model.FriendEmail = string.Empty;
            _validator.ShouldHaveValidationErrorFor(x => x.FriendEmail, model);
        }