Any suggestions for improvement on this style for BDD/TDD?

Posted by Sean B on Stack Overflow See other posts from Stack Overflow or by Sean B
Published on 2010-05-21T16:48:18Z Indexed on 2010/05/21 16:50 UTC
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I was tinkering with doing the setups with our unit test specifciations which go like

Specification for SUT when behaviour X happens in scenario Y Given that this thing And also this other thing When I do X... Then It should do ... And It should also do ...

I wrapped each of the steps of the GivenThat in Actions... any feed back whether separating with Actions is good / bad / or better way to make the GivenThat clear?

        /// <summary>
        /// Given a product is setup for injection
        ///     And Product Image Factory Is Stubbed();
        ///     And Product Size Is Stubbed();
        ///     And Drawing Scale Is Stubbed();
        ///     And Product Type Is Stubbed();
        /// </summary>
        protected override void GivenThat()
        {
            base.GivenThat();

            Action givenThatAProductIsSetupforInjection = () =>
              {
                  var randomGenerator = new RandomGenerator();

                  this.Position = randomGenerator.Generate<Point>();

                  this.Product = new Diffuser
                                     {
                                         Size =
                                             new RectangularProductSize(
                                             2.Inches()),
                                         Position = this.Position,
                                         ProductType =
                                             Dep<IProductType>()
                                     };
              };

            Action andProductImageFactoryIsStubbed = () => Dep<IProductBitmapImageFactory>().Stub(f => f.GetInstance(Dep<IProductType>())).Return(ExpectedBitmapImage);

            Action andProductSizeIsStubbed = () =>
                 {
                     Stub<IDisplacementProduct, IProductSize>(p => p.Size);

                     var productBounds = new ProductBounds(Width.Feet(), Height.Feet());

                     Dep<IProductSize>().Stub(s => s.Bounds).Return(productBounds);
                 };

            Action andDrawingScaleIsStubbed = () => Dep<IDrawingScale>().Stub(s => s.PixelsPerFoot).Return(PixelsPerFoot);

            Action andProductTypeIsStubbed = () => Stub<IDisplacementProduct, IProductType>(p => p.ProductType);

            givenThatAProductIsSetupforInjection();
            andProductImageFactoryIsStubbed();
            andProductSizeIsStubbed();
            andDrawingScaleIsStubbed();
            andProductTypeIsStubbed();
        }

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