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@vkhorikov
Last active Apr 20, 2020
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Representing data as code
public class Industry : Entity
{
public const string CarsIndustry = "Cars";
public const string PharmacyIndustry = "Pharmacy";
public const string MediaIndustry = "Media";
public string Name { get; private set; }
}
public class Customer : Entity
{
public Industry Industry { get; private set; }
public EmailCampaign EmailCampaign { get; private set; }
public Customer(Industry industry)
{
UpdateIndustry(industry);
}
public void UpdateIndustry(Industry industry)
{
EmailCampaign = GetEmailCampaign(industry);
Industry = industry;
}
private EmailCampaign GetEmailCampaign(Industry industry)
{
if (industry.Name == Industry.CarsIndustry)
return EmailCampaign.LatestCarModels;
if (industry.Name == Industry.PharmacyIndustry)
return EmailCampaign.PharmacyTips;
if (industry.Name == Industry.MediaIndustry)
return EmailCampaign.MediaNews;
throw new ArgumentException();
}
}
public enum EmailCampaign
{
LatestCarModels,
PharmacyTips,
MediaNews
}
public class CustomerController
{
public void CreatePharmacy(string name)
{
Industry industry = _industryRepository.GetByName(Industry.PharmacyIndustry);
var customer = new Customer(industry);
_customerRepository.Save(customer);
}
}
public class Industry : Entity
{
public static readonly Industry Cars = new Industry(1, "Cars");
public static readonly Industry Pharmacy = new Industry(2, "Pharmacy");
public static readonly Industry Media = new Industry(3, "Media");
public string Name { get; private set; }
private Industry(int id, string name)
{
Id = id;
Name = name;
}
}
public class Customer : Entity
{
public Industry Industry { get; private set; }
public EmailCampaign EmailCampaign { get; private set; }
public void UpdateIndustry(Industry industry)
{
EmailCampaign = GetEmailCampaign(industry);
Industry = industry;
}
private EmailCampaign GetEmailCampaign(Industry industry)
{
if (industry == Industry.Cars)
return EmailCampaign.LatestCarModels;
if (industry == Industry.Pharmacy)
return EmailCampaign.PharmacyTips;
if (industry == Industry.Media)
return EmailCampaign.MediaNews;
throw new ArgumentException();
}
}
public class CustomerController
{
public void CreatePharmacy(string name)
{
var customer = new Customer(Industry.Pharmacy);
_customerReposoitory.Save(customer);
}
}
[Fact]
public void Updating_industry_updates_email_campaign()
{
var customer = new Customer(Industry.Pharmacy);
customer.UpdateIndustry(Industry.Cars);
Assert.Equal(EmailCampaign.PharmacyTips, customer.EmailCampaign);
}
public class IndustryTests
{
[Fact]
public void All_requires_values_are_in_DB()
{
Verify(1, Industry.Cars);
Verify(2, Industry.Pharmacy);
Verify(3, Industry.Media);
}
private void Verify(int industryId, Industry hardCodedInstustry)
{
using (var unitOfWork = new UnitOfWork())
{
var repository = new IndustryRepository(unitOfWork);
Industry industry = repository.GetById(industryId);
Assert.Equal(industry.Id, hardCodedInstustry.Id);
Assert.Equal(industry.Name, hardCodedInstustry.Name);
}
}
}
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