1. BDD with F# Phillip Trelford @ptrelford http://trelford.com/blog

2. Jargon Buster FP = Functional Programming Immutable = Doesn’t change Idempotent = Free from side effects DSL = Domain Specific Language BDD = Behaviour Driven Development Agile Acceptance Testing Acceptance-Test Driven Development Story-Testing Specification by Example

3. Fun and Profit Introduction Fun with F# Intro -> Code -> What next Profit with BDD Intro -> Code -> What next Summary Q & A

4. Fun and Profit

5. Functional

6. Myth 1 “F# is a purely functional programming language”

7. F# is more a mix of

8. Code Samples 1: // Declare a local value (inferred type is string) 2: letworld="world" 3: 4: // Using '%s' format specifier to include string parameter 5: printfn"Hello %s!"world

9. Myth 2 “FP Will Solve Multi-Core”

10. Parallel Haskell

11. Myth 3 “C/C++ is always faster”

12. Performance

13. Applications

14. F# Books

15. Meet the F#ers

16. 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

17. User Stories

18. Acceptance Test Scenario 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

20. TickSpec

21. Demo

22. BDD Books

23. Lifetime BDD Awards

24. IT Alignment Trap

25. Q & A Or contact me in confidence: Twitter: @ptrelford E-mail: phil(at)trelford.com In-person: http://meetup.com/FSharpLondon