Who cares about Domain Rules?

using NMock2;

using NUnit.Framework;

namespace BusinessRules.Evolution_Three.Tests
{
    [TestFixture]
    public class InvestorFixture
    {
        private Mockery mocks = null;
        private ICurrentCultureInfo currentCulture = null;
        private IIncomeTaxEngine incomeTaxEngine = null;

        /// <summary>
        /// The Setup method is called before each test method is called. 
        /// </summary>
        [SetUp]
        public void Setup()
        {
            mocks = new Mockery();
            currentCulture = mocks.NewMock<ICurrentCultureInfo>();
        }

        [Test]
        public void ValidateInvestorFromTheStates()
        {
            // Setup expectations for our mock.
            Expect.Once.On(currentCulture).GetProperty("CurrentCultureName").Will(Return.Value("en-US"));

            // Create the instance of the income tax engine
            incomeTaxEngine = IncomeTaxEngine.CreateInstance(currentCulture);

            IInvestor investor = new Investor(50000.00);
            investor.TaxEngine = incomeTaxEngine;

            Assert.AreEqual(0.25, investor.TaxRate);
            Assert.AreEqual(9057.35, investor.TaxLiability, 2.0);

            investor.Income = 75895.25;

            Assert.AreEqual(0.28, investor.TaxRate);
            Assert.AreEqual(15581.99, investor.TaxLiability, 2.0);
        }

        [Test]
        public void ValidateInvestorFromAustralia()
        {
            // Setup expectations for our mock.
            Expect.Once.On(currentCulture).GetProperty("CurrentCultureName").Will(Return.Value("en-AU"));

            // Create the instance of the income tax engine
            incomeTaxEngine = IncomeTaxEngine.CreateInstance(currentCulture);

            IInvestor investor = new Investor(50000.00);
            investor.TaxEngine = incomeTaxEngine;

            Assert.AreEqual(0.30, investor.TaxRate);
            Assert.AreEqual(10349.70, investor.TaxLiability, 2.0);

            investor.Income = 75895.25;

            Assert.AreEqual(0.40, investor.TaxRate);
            Assert.AreEqual(18207.70, investor.TaxLiability, 2.0);
        }

        [Test]
        public void ValidateInvestorFromNewZealand()
        {
            // Setup expectations for our mock.
            Expect.Once.On(currentCulture).GetProperty("CurrentCultureName").Will(Return.Value("en-NZ"));

            // Create the instance of the income tax engine
            incomeTaxEngine = IncomeTaxEngine.CreateInstance(currentCulture);

            IInvestor investor = new Investor(50000.00);
            investor.TaxEngine = incomeTaxEngine;

            Assert.AreEqual(0.33, investor.TaxRate);
            Assert.AreEqual(13867.36, investor.TaxLiability, 2.0);

            investor.Income = 75895.25;

            Assert.AreEqual(0.39, investor.TaxRate);
            Assert.AreEqual(23366.45, investor.TaxLiability, 2.0);
        }

        /// <summary>
        /// The Teardown method is called after each test method is called. 
        /// So we validate all the expectations have been met.
        /// </summary>
        [TearDown]
        public void Teardown()
        {
            mocks.VerifyAllExpectationsHaveBeenMet();
        }
    }
}