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Who cares about Domain Rules?

, 20 Nov 2006 MIT
With this article, I am evolving a domain problem towards the best possible solution.
domainrules_src.zip
BusinessRules
0 - Procedural_Way
0 - Procedural_Way.smp
ProceduralWay.cd
Tests
1 - Evolution One
1 - Evolution One.smp
EvolutionOne.cd
Tests
2 - Evolution Two
2 - Evolution Two.smp
EvolutionTwo.cd
Tests
3 - Evolution Three
3 - Evolution Three.smp
EvolutionThree.cd
IncomeTaxEngine.cd
Tests
4 - Evolution Four
4 - Evolution Four.smp
EvolutionFour.cd
Tests
5 - Evolution Five
5 - Evolution Five.smp
EvolutionFive.cd
TaxBandGenerator.cd
Tests
bin
Debug
BusinessRules.dll
BusinessRules.dll.lastcodeanalysissucceeded
NMock2.dll
BusinessRules.csproj.user
obj
Debug
BusinessRules.dll
TempPE
Properties
Tools
NMock2.dll
nunit.framework.dll
using NMock2;

using NUnit.Framework;

namespace BusinessRules.Evolution_Three.Tests
{
    [TestFixture]
    public class IncomeTaxEngineCreationFixture
    {
        private Mockery mocks = null;
        private ICurrentCultureInfo currentCulture = 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 ShouldReturnNewZealandIncomeTaxEngine()
        {
            // Setup expectations for our mock.
            Expect.Once.On(currentCulture).GetProperty("CurrentCultureName").Will(Return.Value("en-NZ"));

            // Execute the behavior
            IIncomeTaxEngine taxEngine = IncomeTaxEngine.CreateInstance(currentCulture);

            // Validate the results is as expected
            Assert.IsNotNull(taxEngine);
            Assert.IsInstanceOfType(typeof (NewZealandIncomeTaxEngine), taxEngine);
        }

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

            // Execute the behavior
            IIncomeTaxEngine taxEngine = IncomeTaxEngine.CreateInstance(currentCulture);

            // Validate the results is as expected
            Assert.IsNotNull(taxEngine);
            Assert.IsInstanceOfType(typeof (AustralianIncomeTaxEngine), taxEngine);
        }

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

            // Execute the behavior
            IIncomeTaxEngine taxEngine = IncomeTaxEngine.CreateInstance(currentCulture);

            // Validate the results is as expected
            Assert.IsNotNull(taxEngine);
            Assert.IsInstanceOfType(typeof (UsaIncomeTaxEngine), taxEngine);
        }

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

            // Execute the behavior
            IIncomeTaxEngine taxEngine = IncomeTaxEngine.CreateInstance(currentCulture);

            // Validate the results is as expected
            Assert.IsNotNull(taxEngine);
            Assert.IsInstanceOfType(typeof (NullIncomeTaxEngine), taxEngine);
        }

        /// <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();
        }
    }
}

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This article, along with any associated source code and files, is licensed under The MIT License

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About the Author

Maruis Marais
Web Developer
New Zealand New Zealand
No Biography provided

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