using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        new UnitTests().PerformUnitTest();

    }

}

​

// INSTRUCTIONS:

​

// The CustomerValidator class retrieves a value from the current HttpContext,

// uses that value to pull a record from the database, plus makes an API call.

​

// Refactor CustomerValidator so that the PerformUnitTest() method can execute 

// without interacting with any of these external services.  GetCustomerAndValidateZip()

// must still interact with all these services when run in the context of the

// host application.

​

// Adjust the unit test so that it tests one good zip code and one bad one,

// resulting in two "PASS" lines in the console.

public class UnitTests

{   

    public void PerformUnitTest()

    {

        var sut = new CustomerValidator();

        var expected = true;

        var actual = sut.GetCustomerAndValidateZip();

        var result = expected == actual ? "PASS" : "FAIL";

        Console.WriteLine(result);

        actual = sut.GetCustomerAndValidateZip2();

        result = expected == actual ? "PASS" : "FAIL";

        Console.WriteLine(result);

    }

}

​

public class CustomerValidator

{

    public bool GetCustomerAndValidateZip()

    {

        var repository = new CustomerRepository();

        //int customerId = (int)HttpContext.Current.Profile.GetPropertyValue("CustomerId");

        int customerId = 1;

        var customer = repository.GetCustomer(customerId);

        var allZipCodes = GetAllValidZipCodes();

        return allZipCodes.Contains(customer.ZipCode);

    }

​

    public bool GetCustomerAndValidateZip2()

    {

        var repository = new CustomerRepository();

        //int customerId = (int)HttpContext.Current.Profile.GetPropertyValue("CustomerId");

        int customerId = 2;

        var customer = repository.GetCustomer(customerId);

        var allZipCodes = GetAllValidZipCodes();

        return !allZipCodes.Contains(customer.ZipCode);

    }

    private List<string> GetAllValidZipCodes()

    {

        var httpClient = new HttpClient();

        //return httpClient.Get<List<string>>("http://somezipcodeapi.com/GetAll");

        return new List<string>{"10010","ziphttp"};

    }

}

​

public class Customer

{

    public int ID { get; set; }

    public string ZipCode { get; set; }

}

​

public class CustomerRepository

{

    public Customer GetCustomer(int customerId)

    {

        var db = new DbContext();

        return db.Customers.SingleOrDefault(i => i.ID == customerId);

    }

}

​

public class DbContext

{

    public List<Customer> Customers { get; set; }

    public DbContext()

    {

        Customers = new List<Customer>();

        Customer c = new Customer(){ID = 1, ZipCode = "10010"};

        Customers.Add(c);

        Customer c2 = new Customer(){ID = 2, ZipCode = "zipdb"};

        Customers.Add(c2);

    }

​

}

​

public class HttpClient

{

    public T Get<T>(string url)

    {

        // perform HTTP call and return response

        return default(T);

    }

}