public async void Name_Update_length()
        {
            Mock <ICountryRegionRepository> countryRegionRepository = new Mock <ICountryRegionRepository>();

            countryRegionRepository.Setup(x => x.Get(It.IsAny <string>())).Returns(Task.FromResult(new CountryRegion()));

            var validator = new ApiCountryRegionRequestModelValidator(countryRegionRepository.Object);
            await validator.ValidateUpdateAsync(default(string), new ApiCountryRegionRequestModel());

            validator.ShouldHaveValidationErrorFor(x => x.Name, new string('A', 51));
        }
        private async void BeUniqueByName_Create_Not_Exists()
        {
            Mock <ICountryRegionRepository> countryRegionRepository = new Mock <ICountryRegionRepository>();

            countryRegionRepository.Setup(x => x.ByName(It.IsAny <string>())).Returns(Task.FromResult <CountryRegion>(null));
            var validator = new ApiCountryRegionRequestModelValidator(countryRegionRepository.Object);

            await validator.ValidateCreateAsync(new ApiCountryRegionRequestModel());

            validator.ShouldNotHaveValidationErrorFor(x => x.Name, "A");
        }
        public async void Name_Create_null()
        {
            Mock <ICountryRegionRepository> countryRegionRepository = new Mock <ICountryRegionRepository>();

            countryRegionRepository.Setup(x => x.Get(It.IsAny <string>())).Returns(Task.FromResult(new CountryRegion()));

            var validator = new ApiCountryRegionRequestModelValidator(countryRegionRepository.Object);
            await validator.ValidateCreateAsync(new ApiCountryRegionRequestModel());

            validator.ShouldHaveValidationErrorFor(x => x.Name, null as string);
        }