CZ Biz. Auto. System & Test-Driven Development Teoman Soygul (Sept 24, 2012).

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Presentation transcript:

CZ Biz. Auto. System & Test-Driven Development Teoman Soygul (Sept 24, 2012).

……………………………… Agenda Modern software development methodologies for testable applications Test-driven development How to we do use TDD in-house Q/A

How to be Testable Road to test-driven development

How to be testable? Be modular so individual modules can be tested in isolation. Pluggable architecture for frontend (Web & Desktop Apps). Service-oriented architecture for backend.

How to be testable? Use object-oriented design in a SOLID manner. S Single responsibility principle O Open/closed principle L Liskov substitution principle I Interface segregation principle D Dependency inversion principle

How to be testable? Use testable frameworks. Persistence (Entity Framework) Backend (WCF) Frontend (ASP.NET MVC) Unit/Integration Tests (NUnit) Function Tests (Selenium) Mocking (Moq) IoC Containers (Ninject)

Test-Driven Development Stairways to heaven or Highway to hell

……………………………… Testing Hierarchy End-to-end system testing Verify component integrations (or subsystems) Verify component in isolation

……………………………… Unit/Integration/Functional Testing [Unit] [Functional] [Integration]

Example: New Partner Portal The new partner portal is based on our new CMS and is integrated with our CRM.

CRM Integration CRM integration gives partners ability to track their customers, contacts, opportunities, use the price calculator or create leads.

……………………………… Simplified use case for CRM Tools :: Opportunity Controller Using the ‘Opportunities’ menu at the CRM Tools section, a partner can view or create opportunities.

……………………………… Simplified composition diagram for CRM Tools :: Opportunity Controller User Interface CRM Server MVC SOA

……………………………… TDD for Opportunity Controller Unit Tests: Opportunity Controller Unit Tests: Individual Repository Tests Integration Tests: Controller + Repository Functional Testing Mock Dependencies Setup Expectations Act then Assert

……………………………… TDD for Opportunity Controller Unit Tests: Opportunity Controller Unit Tests: Individual Repository Tests Integration Tests: Controller + Repository Functional Testing Inject Actual Dependencies Start Actual Services Act then Assert

……………………………… TDD for Opportunity Controller Unit Tests: Opportunity Controller Unit Tests: Individual Repository Tests Integration Tests: Controller + Repository Functional Testing Setup Expectations Exercise System Assert

How do we do TDD w/ Biz. Auto. Cool stuff on the way…

……………………………… Deadlines & Iterations New iteration: Want to develop a ‘CRM Tools :: Lead Controller’, repeat the whole process all over again. Deadline is a basic cut off date for the iterations (supported user stories). Extending a deadline means more iterations can be made hence more stories can be implemented. An earlier deadline is simply the reversal of this effect.

……………………………… TDD & Continuous Integration Each ‘Push’ to the source code repository is picked up by our continuous integration server (TeamCity), and a new build is created, and all the tests are run, and a code coverage report is generated.

……………………………… Released the application and got a bug report. What do we do? Regression testing : Create a test replicating the bug. Fix the bug. Make sure that test passes. Bugs have a habit or recurring so regression testing makes sure that they don’t resurrect!

……………………………… Q/A