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
![DeclarationsGherkinGiven I input 5When calculating the factorialThen the result is 120NaturalSpec[<Scenario>] let ``When calculating factorial of 5 it should equal 120``() = Given 5 |> When calculating factorial |> It should equal 120 |> Verify](https://image.slidesharecdn.com/bddwithfsharpatdddbelfast-111002043907-phpapp02/85/BDD-with-F-at-DDDBelfast-15-320.jpg)
BDD with F# at DDDBelfast
- 1. Behaviour Driven Developmentwith C# & F#Phil Trelford / @ptrelford
- 3. Agile ManifestoIndividuals and interactionsover processes and toolsWorking softwareover comprehensive documentationCustomer collaborationover contract negotiationResponding to changeover following a plan
- 5. User Stories
- 6. Acceptance TestsRefunded items should be returned to stockGiven a customer buys a black jumperAnd I have 3 black jumpers left in stockWhen he returns the blackjumper for a refundThen I should have 4 black jumpers in stock
- 7. Test Driven Development (TDD)BenefitsFacilitates changeRefactoringRegression TestingDocumentationAPILiving DocumentationDesignClasses, MethodsBehaviour
- 8. Unit TestingA 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 betweenDevelopersQABusiness 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)BenefitsFacilitates ChangeRefactoringRegressionRewritingDocumentationBehaviourLiving DocumentationDomain LanguageDefines DoneWhen all tests pass
- 11. Team Workshops
- 12. BA + Developer + QA
- 14. BDD FrameworksExternal DSLCuke4NukeNBehaveStorEvilSpecFlowTickSpecInternal DSLMSpecNaturalSpecNSpecSpecsForStoryQ
- 15. DeclarationsGherkinGiven I input 5When calculating the factorialThen the result is 120NaturalSpec[<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 toolsStart by having conversations, engaging both testers and business stakeholdersIf you cant have those conversations, stop. You cant do BDD Liz Keogh
- 22. BDD Patterns: TablesScenario: 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: ExamplesScenario: 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 winsExamples: | row | col | | middle | right | | middle | middle | | bottom | middle |
- 24. BDD Books
- 26. Q & AOr contact me in confidence:Twitter: @ptrelfordE-mail: phil(at)trelford.comIn-person: http://meetup.com/FSharpLondon
Editor's Notes
- 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 contractThese 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.