Unit testing of decorator drawing

Question

I recently solved one of my problems using a decorator pattern. Everything works fine, and everything is quite decoupled (or, I think) that I can unit test each valid field separately.

My question is if NameValidator and AgeValidator pass tests for Validate () and IsValid () (abstract) functions. Do I still need the unit test class ValidationDecorator (not yet created)? ValidationDecorator will be responsible for issuing my validator with each validation class.

public abstract class FieldValidator
{
    protected IMessage validateReturnType;

    public FieldValidator() { }

    public bool IsValid()
    {
        return (validateReturnType.GetType() == typeof(Success));
    }
}

public class NameValidator : FieldValidator, IValidator
{
    private string name;

    public NameValidator(string _name) { 
        name = _name;
    }

    public IMessage Validate()
    {
        if (name.Length < 5)
        {
            validateReturnType = new Error("Name error.");
        }
        else
        {
            validateReturnType = new Success("Name no errror.");
        }

        return validateReturnType;
    }
}

public class AgeValidator : FieldValidator, IValidator
{
    private int age;

    public AgeValidator(int _age)
    {
        age = _age;
    }

    public IMessage Validate()
    {
        if (age <= 18)
        {
            validateReturnType = new Error("Age error.");
        }
        else
        {
            validateReturnType = new Success("Age no errror.");
        }

        return validateReturnType;
    }
}

public interface IValidator
{
    IMessage Validate();
    bool IsValid();
}

This is my unit test.

[TestFixture]
public class ValidatorTest
{
    Type successType;
    Type errorType;

    Model m;

    [SetUp]
    public void SetUp()
    {
        successType = typeof(Success);
        errorType = typeof(Error);

        m = new Model();
        m.Name = "Mike Cameron";
        m.Age = 19;
        m.Height = 325;

        Validator v = new Validator();
        v.Validate(m);
    }

    [Test]
    public void ValidateNameTest()
    {
        IValidator im = new NameValidator(m.Name);

        IMessage returnObj = im.Validate();

        Assert.AreEqual(successType, returnObj.GetType());
    }

    [Test]
    public void IsValidNameTest()
    {
        IValidator im = new NameValidator(m.Name);

        IMessage returnObj = im.Validate();

        Assert.IsTrue(im.IsValid());
    }

    [Test]
    public void ValidateAgeTest()
    {
        IValidator im = new AgeValidator(m.Age);

        IMessage returnObj = im.Validate();

        Assert.AreEqual(successType, returnObj.GetType(), "Must be over 18");
    }

    [Test]
    public void IsValidAgeTest()
    {
        IValidator im = new AgeValidator(m.Age);

        IMessage returnObj = im.Validate();

        Assert.IsTrue(im.IsValid());
    }

Thank.

Answer 1

- " , ". , , , . . , , .

, , , , ValidationDecorator , . , :-) , . - unit test - , , .

Answer 2

, unit test , . unit test ValidationDecorator, mock stub- IValidator.