Getting started with TDD and DDD

Question

I just finished reading Domain Management Project: Eliminating Complexity at the Software Center by Eric Evans, and I'm trying to write my first domain-oriented application (in C #).

The application will be used by our support team to track the distribution of computers to users.

I sketched a simple class diagram to reflect part of the domain. It looks like this...

Class Diagram showing two classes: Owner and Computer. There is a one-way communication between the computer and the owner named "Select" http://www.freeimagehosting.net/uploads/183dd57031.jpg

I also defined my first function (to allocate a computer for the user) and wrote a test for it ...

[Test]
public void AllocateToUser()
{
    var user = new Owner("user1");
    var computer = new Computer("computer1");

    computer.Allocate(user);

    Assert.AreEqual(user.Username, computer.AllocatedTo.Username);
}

Finally, I wrote the code to pass the test.

public class Computer
{
    public Computer(string name)
    {
        Name = name;
    }

    public string Name
    { get; private set; }

    public Owner AllocatedTo
    { get; private set; }

    public void Allocate(Owner owner)
    {
        AllocatedTo = owner;
    }
}

public class Owner
{
    public Owner(string username)
    {
        Username = username;
    }

    public string Username
    { get; private set; }
}

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public class ComputerRepository
{
    public void Store(Computer computer)
    {
        //Some persistence logic here (possibly using NHibernate?)
    }
}

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  • ComputerRepository Store.

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?

Answer 1

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