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TDD, DI, and SoC with ASP.NET MVC

TDD, DI, and SoC with ASP.NET MVC. Presented by Jeffrey Palermo CTO, Headspring Systems Microsoft MVP, MCSD.Net jpalermo@headspringsystems.com. Agenda. What is ASP.NET MVC? Sound architectural approach Soc – Separation of Concerns DI – Dependency Injection

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TDD, DI, and SoC with ASP.NET MVC

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  1. TDD, DI, and SoCwith ASP.NET MVC Presented by Jeffrey Palermo CTO, Headspring Systems Microsoft MVP, MCSD.Net jpalermo@headspringsystems.com

  2. Agenda What is ASP.NET MVC? Sound architectural approach Soc – Separation of Concerns DI – Dependency Injection TDD – Test-Driven Development Questions

  3. INETA - The Face of .NET • World-wide association of .NET User Groups • 860+ groups world-wide • Over 810,000 developers • Started and run by .NET User Group leaders • Sponsors and supports both .NET and other professional user groups all around the world • Sponsors • Microsoft • Verio • New sponsors welcome! • North America (NorAm) INETA Speaker Bureau consists of 67 world-renowned speakers www.ineta.org

  4. What is ASP.NET? ASP.NET • HttpApplication • HttpContext • HttpRequest • HttpResponse • HttpRuntime • HttpUtility • IHttpHandler • IHttpModule WebForms • Server Lifecycle • Postback • ViewState ASPX • MasterPages • Themes, Skins • General Templating

  5. What is ASP.NET MVC? ASP.NET • HttpApplication • HttpContext • HttpRequest • HttpResponse • HttpRuntime • HttpUtility • IHttpHandler • IHttpModule Mvc • Routes • Controllers • ViewData • Filters • MvcContrib ASPX • MasterPages • Themes, Skins • General Templating

  6. Two types of architecture • Short-term • Long-lived

  7. Philosophy • Software Systems are complex • Maintainability is king • Simplicity rules • Abstraction and the human brain (7+/-2) • ASP.NET MVC is going away • Coupling to infrastructure

  8. Coupling (Architectural Metrics) • Afferent Coupling (Ca) – incoming dependencies • Efferent Coupling (Ce) – outgoing dependencies • Instability (I) • I = Ce / (Ce + Ca) (0 = stable, 1 = instable) • Stable = painful to modify • Abstractness (A) • # Abstract Types / # Total Types (0 = concrete assembly, 1 = abstract assembly)

  9. Traditional Layered Architecture UI Business Logic Data Access/Infrastructure

  10. Traditional Layered Architecture UI Business Logic Data Access WCF I/O

  11. Solution Structure UI Business Logic Web Service File Infrastructure Data Access DB

  12. Better layering UI I/O WCF Data Access Business Logic (service classes) Object Model (business logic)

  13. Onion Architecture LoginController IEmployeeRepository IUserSession User Interface Application Services HttpUserSession <<class>> Object Services Object Model EmployeeSelectList Employee Web Service Application Core Tests File Infrastructure EmployeeRepository <<class>> DB

  14. Solution Structure UI Core IoC Container Web Service File Infrastructure DB

  15. Demo ahead (all code)

  16. MvcContrib • http://mvccontrib.org • Founded by Eric Hexter and Jeffrey Palermo • Multiple view engines • ViewDataExtensions • IoC Container support • Html helpers • Extra ActionFilters • Anything else the community contributes

  17. About me • CTO, Headspring Systems • Agile coach • MCSD.Net • Microsft MVP, ASPInsider • Certified ScrumMaster • Austin .Net User Group • INETA speakers bureau • U.S. Army Veteran • Party with Palermo • www.partywithpalermo.com • Headspring’s Agile Boot Camp

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