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Yay! Mocks!

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Yay! Mocks!

Discussion about usage of test-doubles in driving design

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Corey Haines

June 26, 2012
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Transcript

  1. Tuesday, June 26, 2012

  2. YAY! Mocks! @coreyhaines Nordicy RubyConf 2012 Tuesday, June 26, 2012

  3. YAY! Test Doubles! @coreyhaines Nordicy RubyConf 2012 Tuesday, June 26,

    2012

  4. Zak! Tuesday, June 26, 2012

  5. Test-Driven Development Tuesday, June 26, 2012

  6. Object-Oriented is about messages Tuesday, June 26, 2012

  7. Object-Oriented is about interactions Tuesday, June 26, 2012

  8. Object-Oriented is about services Tuesday, June 26, 2012

  9. Roles vs Things Tuesday, June 26, 2012

  10. Test-Driven Development Tuesday, June 26, 2012

  11. Test-First Development Tuesday, June 26, 2012

  12. Test-Driven vs Test-First Tuesday, June 26, 2012

  13. Reaction to pain Tuesday, June 26, 2012

  14. Test-First -> Change Tests Tuesday, June 26, 2012

  15. Test-Driven -> Change Design Tuesday, June 26, 2012

  16. Test-Doubles Often Highlight Pain Tuesday, June 26, 2012

  17. Zak! Tuesday, June 26, 2012

  18. Examples Tuesday, June 26, 2012

  19. Showing list of Coderetreats for today Tuesday, June 26, 2012

  20. You have to change your test When you change this

    hash Tuesday, June 26, 2012

  21. Feels Very Fragile Tuesday, June 26, 2012

  22. PAIN! Tuesday, June 26, 2012

  23. Discomfort! Tuesday, June 26, 2012

  24. Tuesday, June 26, 2012

  25. Why is this information relevant to the controller? Tuesday, June

    26, 2012

  26. Bypassing Layers Tuesday, June 26, 2012

  27. This is odd Tuesday, June 26, 2012

  28. Controller calling database? Tuesday, June 26, 2012

  29. Controller should know ‘WHAT’ not ‘HOW’ Tuesday, June 26, 2012

  30. Better to insert a layer Tuesday, June 26, 2012

  31. Controller Business-Oriented Services DB Tuesday, June 26, 2012

  32. What, not How Tuesday, June 26, 2012

  33. Better to delegate the How Tuesday, June 26, 2012

  34. TDD is about design Tuesday, June 26, 2012

  35. Change design, not tests Tuesday, June 26, 2012

  36. Focusing on usage Tuesday, June 26, 2012

  37. I like Presenters! Tuesday, June 26, 2012

  38. Tuesday, June 26, 2012

  39. double depending on doubles?? Tuesday, June 26, 2012

  40. UGH! Tuesday, June 26, 2012

  41. Too much detail at this level? Jumping levels of abstraction?

    Tuesday, June 26, 2012

  42. Change design to fix pain Tuesday, June 26, 2012

  43. Simplify our example Tuesday, June 26, 2012

  44. Simplify our example Tuesday, June 26, 2012

  45. Much simpler, more focused on what the controller needs to

    know Tuesday, June 26, 2012

  46. Tuesday, June 26, 2012

  47. TDD is about refactoring Tuesday, June 26, 2012

  48. TDD is about refactoring away from discomfort Tuesday, June 26,

    2012

  49. Changing your design, to fix pain Tuesday, June 26, 2012

  50. Test doubles can help highlight and fix pain Tuesday, June

    26, 2012

  51. Take-Home Challenge Tuesday, June 26, 2012

  52. Tuesday, June 26, 2012

  53. Coupled Roles Tuesday, June 26, 2012

  54. Unnecessary noise Tuesday, June 26, 2012

  55. or false positive if yesterday’s or tomorrow’s are not created

    in database Tuesday, June 26, 2012

  56. How to change design to fix this? Tuesday, June 26,

    2012

  57. Thanks! @coreyhaines Nordicy RubyConf 2012 font inspiration: bit.ly/corey-sans Tuesday, June

    26, 2012