BDD with F# at DDDBelfast
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Talk presented at DDD Belfast in October 2011. Session abstract: http://www.developerdeveloperdeveloper.com/dddie11/ViewSession.aspx?SessionID=748
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BDD with F# at DDDBelfast
- 1. Behaviour Driven Developmentwith C# & F# Phil Trelford / @ptrelford
- 3. Agile Manifesto Individuals and interactions over processes and tools Working software over comprehensive documentation Customer collaboration over contract negotiation Responding to change over following a plan
- 5. User Stories
- 6. Acceptance Tests Refunded items should be returned to stock Given a customer buys a black jumper And I have 3 black jumpers left in stock When he returns the blackjumper for a refund Then I should have 4 black jumpers in stock
- 7. Test Driven Development (TDD) Benefits Facilitates change Refactoring Regression Testing Documentation API Living Documentation Design Classes, Methods Behaviour
- 8. Unit Testing “A good unit test needs both to illustrate and define the behavioural contract of the unit in question. Behaviour is more than just individual methods…” – KevlinHenney
- 9. Behaviour Driven Development(BDD) “Is an agile software development technique that encourages collaboration between Developers QA Business Participants in a software project.” “It extends TDD by writing test cases in a natural language that non-programmers can read.”
- 10. Behaviour Driven Development (BDD) Benefits Facilitates Change Refactoring Regression Rewriting Documentation Behaviour Living Documentation Domain Language Defines Done When all tests pass
- 11. Team Workshops
- 12. BA + Developer + QA
- 14. BDD Frameworks External DSL Cuke4Nuke NBehave StorEvil SpecFlow TickSpec Internal DSL MSpec NaturalSpec NSpec SpecsFor StoryQ
- 15. Declarations Gherkin Given I input 5 When calculating the factorial Then the result is 120 NaturalSpec [<Scenario>] let ``When calculating factorial of 5 it should equal 120``() = Given 5 |> When calculating factorial |> It should equal 120 |> Verify
- 16. First Steps in BDD on .Net
- 17. Look no hands
- 18. Look no hands
- 19. TickSpec
- 20. Demo
- 21. Step away from the tools “Start by having conversations, engaging both testers and business stakeholders If you can’t have those conversations, stop. You can’t do BDD” – Liz Keogh
- 22. BDD Patterns: Tables Scenario: Winning positions Given a board layout: | 1 | 2 | 3 | | O | O | X | | O | | | | X | | X | When a player marks X at middle right Then X wins
- 23. BDD Patterns: Examples Scenario: Winning positions Given a board layout: | 1 | 2 | 3 | | O | O | X | | O | | | | X | | X | When a player marks X at <row> <col> Then X wins Examples: | row | col | | middle | right | | middle | middle | | bottom | middle |
- 24. BDD Books
- 26. Q & A Or contact me in confidence: Twitter: @ptrelford E-mail: phil(at)trelford.com In-person: http://meetup.com/FSharpLondon
Notes de l'éditeur
- http://www.stickyminds.com/sitewide.asp?Function=edetail&ObjectType=ART&ObjectId=13833&tth=DYN&tt=siteemail&iDyn=2Key part here is “A good unit test needs to define the behavioural contract”These kind of observations were what prompted Dan North into evolving TDD into BDD, which is what we will discuss next.
- This is a description of what BDD is and how it relates to TDD.
- BDD also known as Acceptance Test Driven Development etc.