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![Daniel IrvineModern software craftsmanship
– Frank Chimero, “Everything Easy is Hard Again”
“Go slow and fix things […] Let’s be
more like that tortoise: diligent,
direct, and purposeful.”
https://frankchimero.com/writing/everything-easy-is-hard-again/](https://image.slidesharecdn.com/modernsoftwarecraftsmanshipdanielirvinesconflictedcopy1-180223201925/85/Modern-software-craftsmanship-26-320.jpg?cb=1519417340)
Modern software craftsmanship
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- 2. Daniel IrvineModern softwarecraftsmanship You may already be a software crafter without even knowing it!
- 3. Daniel IrvineModern softwarecraftsmanship It’s not a methodology… … although there is a lot of method to it
- 4. Daniel IrvineModern softwarecraftsmanship It’s not about Test-Driven Development… … although we will discuss Test-Driven Development
- 5. Daniel IrvineModern softwarecraftsmanship It’s not just fancy consultancy… … although it is an easy thing to sell
- 6. Daniel IrvineModern softwarecraftsmanship It’s not art… … it is a little bit
- 7. Daniel IrvineModern softwarecraftsmanship It is… … a style of work … an ethos … an approach to developing software
- 8. Daniel IrvineModern softwarecraftsmanship Some important moments in software organization Waterfall Iterative XP Craftsmanship Alt Dot Net meetup.com
- 9. Daniel IrvineModern softwarecraftsmanship Craftsmanship Craft XP Scrum
- 10. Daniel IrvineModern softwarecraftsmanship How can craftsmanship remain relevant in the modern era?
- 11. Daniel IrvineModern softwarecraftsmanship Quality Professionalism Community
- 12. Daniel IrvineModern softwarecraftsmanship - Kent Beck, Implementation Patterns “I have seen too much ugly code make too much money to believe that quality of code is either necessary or sufficient for commercial success or widespread use.”
- 13. Daniel IrvineModern softwarecraftsmanship Quality Assurance: An admittance that developers are not good at quality.
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- 15. Daniel IrvineModern softwarecraftsmanship How do we measure quality? Coverage CommentsDocumentation Linting
- 16. Daniel IrvineModern softwarecraftsmanship If you ask 100 different people what TDD is, you’ll get 100 different answers.
- 17. Daniel IrvineModern softwarecraftsmanship Test-Driven Development is a mechanism for supporting change. Test-Driven Development is not testing.
- 18. Daniel IrvineModern softwarecraftsmanship –Adapted from Gojko Adzic’s “Alice in the Hall of Mirrors” TDD as a mirror https://gojko.net/2018/01/23/alice-in-the-hall-of-mirrors.html
- 19. Daniel IrvineModern softwarecraftsmanship oneApple = { name: 'apple', amount: 1 } it 'prints 1 apple' expect(format(oneApple)).toEqual('1 apple') def format(ingredient) ingredient.amount + ' ' + ingredient.name
- 20. Daniel IrvineModern softwarecraftsmanship def format(ingredient) if ingredient.amount = 1 '1 ' + ingredient.name else ingredient.amount + ' ' + ingredient.name + 's' twoApples = { name: 'apple', amount: 2 } it 'prints 2 apples' expect(format(twoApples)).toEqual('2 apples')
- 21. Daniel IrvineModern softwarecraftsmanship twoTomatoes = { name: 'tomato', amount: 2 } plurals = { 'tomato' -> 'tomatoes' } it 'prints 2 tomatoes' expect(format(twoTomatoes, plurals)).toEqual('2 tomatoes') def format(ingredient, plurals = {}) if ingredient.amount = 1 '1 ' + ingredient.name else plural = plurals.get(name) || name + 's' ingredient.amount + ' ' + plural
- 22. Daniel IrvineModern softwarecraftsmanship choppedTomatoes = { name: 'tomato', amount: 2, instruction: 'chopped' } it 'prints 2 chopped tomatoes' expect(format(choppedTomatoes, plurals)) .toEqual('2 chopped tomatoes') // left as an exercise for the reader
- 23. Daniel IrvineModern softwarecraftsmanship The use of mock objects: Build independent units of specification Simulate failure conditions
- 24. Daniel IrvineModern softwarecraftsmanship What is the essence of TDD? - Specification - Design aid - Technique for slowing down
- 25. Daniel IrvineModern softwarecraftsmanship With great TDD, the only types of failure you’ll see in production are scenarios you haven’t designed for
- 26. Daniel IrvineModern softwarecraftsmanship – Frank Chimero, “Everything Easy is Hard Again” “Go slow and fix things […] Let’s be more like that tortoise: diligent, direct, and purposeful.” https://frankchimero.com/writing/everything-easy-is-hard-again/
- 27. Daniel IrvineModern softwarecraftsmanship Refactoring is your opportunity to go slow
- 28. Daniel IrvineModern softwarecraftsmanship Example: Extracting a method def format(ingredient, plurals = {}) if ingredient.amount = 1 '1 ' + ingredient.name else plural = plurals.get(name) || name + 's' ingredient.amount + ' ' + plural def format(ingredient, plurals = {}) if ingredient.amount = 1 '1 ' + ingredient.name else ingredient.amount + ' ' + plural(ingredient.name, plurals) def plural(name, plurals) if plurals.contains?(name) plurals.get(name) else name + 's'
- 29. Daniel IrvineModern softwarecraftsmanship Codebases should be networks of small, connected components
- 30. Daniel IrvineModern softwarecraftsmanship TDD not only removes the fear of experimenting with design but also encourages experimentation
- 31. Daniel IrvineModern softwarecraftsmanship Q. Do we teach TDD to novice programmers, right from the word ‘go’? A. It might be better to focus on good design first.
- 32. Daniel IrvineModern softwarecraftsmanship Disclaimer! TDD is just one tool in your toolbox. It will not lead you to enlightenment.
- 33. Daniel IrvineModern softwarecraftsmanship Most importantly Craft != TDD
- 34. Daniel IrvineModern softwarecraftsmanship Code comments are a code smell
- 35. Daniel IrvineModern softwarecraftsmanship Craft is the idea that learning never ends College programmer Comments: good Professional programmer Comments: bad
- 36. Daniel IrvineModern softwarecraftsmanship Quality Professionalism Community
- 37. Daniel IrvineModern softwarecraftsmanship Business analyst Tester Programmer
- 38. Daniel IrvineModern softwarecraftsmanship Crafters are generalists/polyglots • Picking the right tool for the job • Capitalizing on breadth of experience • Sharing techniques across communities
- 39. Daniel IrvineModern softwarecraftsmanship Crafters are responsible • Building maintainable, long-life software • Making the right tradeoffs • Engaging with stakeholders • Engaging with industry
- 40. Daniel IrvineModern softwarecraftsmanship Professionalism does not mean suits, ties and handshakes Professionalism does mean humbleness, humanity, and trust
- 41. Daniel IrvineModern softwarecraftsmanship Adult coders are not kids!
- 42. Daniel IrvineModern softwarecraftsmanship Quality Professionalism Community
- 43. Daniel IrvineModern softwarecraftsmanship But crafters are life-long learners Some college grads give up on education
- 44. Daniel IrvineModern softwarecraftsmanship Industry Craft • Know everything before you join • “Interesting problems” aka “lots of incidental complexity” • Deliberate practice • Mentoring • Hire for ability to learn and work with others
- 45. Daniel IrvineModern softwarecraftsmanship Finding a mentor is an important step to continued career growth Being a mentor is important for a healthy community
- 46. Daniel IrvineModern softwarecraftsmanship What does technical mentoring look like? • Code reviews • Guided learning • Planning & estimating • Reading suggestions • Listening • Sponsorship
- 47. Daniel IrvineModern softwarecraftsmanship Bootcamps are a natural fit for software craft
- 48. Daniel IrvineModern softwarecraftsmanship ‘Full-fat’ craftsmanship means apprenticeships No client work Syllabus/plan Mentor acts as a client Blogging Graduation
- 49. Daniel IrvineModern softwarecraftsmanship Crafters are everywhere! SoCraTes Codebar Ladies of Code Queer Code
- 50. Daniel IrvineModern softwarecraftsmanship Software crafters are working towards an inclusive industry… … because software is for everyone
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- 52. Daniel IrvineModern softwarecraftsmanship What hasn’t worked for us: - the medieval craftsman guild model - journeymen - the manifesto - elitism
- 53. Daniel IrvineModern softwarecraftsmanship Quality Professionalism Community
- 54. Daniel IrvineModern softwarecraftsmanship Can I be a software crafter if… … I don’t practice TDD? … I work for a big faceless corporation? … I don’t call myself a crafter?
- 55. Daniel IrvineModern softwarecraftsmanship Craft Craftsmanship Community and open spaces Life-long learning Mentoring TDD (or not) Refactoring Generalism Responsibility Professionalism Apprenticeships Manifesto Job titles Conferences
- 56. Daniel IrvineModern softwarecraftsmanship What does the future hold for software craft? Industry ethics Socially responsible software Plenty of fresh ideas
- 57. Daniel IrvineModern softwarecraftsmanship softwarecrafters.org Join the Slack community or register your IRL community
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