Programowanie wspierane przez testy po londyńsku

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1. JAKUB ZALAS
   PO LONDYŃSKU
   PROGRAMOWANIE
   
   
   WSPIERANE PRZEZ TESTY
   PHP
   
   
   EDITION
   

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2. Jakub Zalas
   @jakub_zalas
   @jakub_zalas
   @jakzal
   

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3. - Behaviour
   
   
   - Veri
   fi
   cation
   
   
   - The chain premise
   
   
   - Collaboration tests
   
   
   - Test doubles
   
   
   - Contract tests
   
   
   - Mocking hell
   PLAN
   

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11. https://blog.thecodewhisperer.com/permalink/integrated-tests-are-a-scam
    Beware the Integrated Tests Scam
    J. B. Rainsberger / @jbrains
    

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22. VS
    

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27. VS
    

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32. DATA
    CALCULATIONS
    ACTIONS
    Grokking Simplicity
    
    
    Eric Normand
    2021
    

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35. “TEST A CHAIN BY TESTING EACH LINK”
    MICHAEL "GEEPAW" HILL
    https://www.geepawhill.org/2018/01/16/underplayed-the-chain-premise-in-depth/
    

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41. WE GET TO CHOOSE
    
    
    WHEN AND WHERE
    
    
    WE BREAK THE DEPENDENCY CHAIN
    
    
    FOR TESTING
    

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44. COLLABORATION TESTS
    

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45. INDIRECT INPUT
    INDIRECT OUTPUT
    

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52. xUnit Test Patterns
    
    
    Refactoring Test Code
    Gerard Meszaros
    2007
    
    
    

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53. WE HAVE DETECTED UNUSUALLY HIGH SPENDING
    ON YOUR CARD IN THESE CATEGORIES:
    
    
    • YOU SPENT £101.19 ON FOOD
    
    
    • YOU SPENT £27.70 ON ENTERTAINMENT
    
    
    https://github.com/testdouble/contributing-tests/wiki/Unusual-Spending-Kata
    

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54. SPY & STUB
    HAND-CRAFTED
    

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56. A REAL OBJECT,
    
    
    BUT A DUMMY
    
    
    WOULD WORK AS WELL.
    

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58. A SPY
    

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59. A SPY
    

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63. A STUB
    

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64. A STUB
    

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67. MOCK OBJECT
    HAND-CRAFTED
    

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68. A MOCK OBJECT
    

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69. A MOCK OBJECT
    

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71. A MOCK OBJECT
    

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72. STUB & MOCK OBJECT
    WITH A MOCKING FRAMEWORK
    

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73. A STUB
    

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74. A MOCK OBJECT
    

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76. A MOCK OBJECT
    

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77. CONTRACT TESTS
    aka "Role tests"
    

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84. UnusualSpendingNotificationUseCaseTest
    

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85. UnusualSpendingNotificationUseCaseTest
    

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86. UnusualSpendingQueryTest
    UnusualSpendingQueryTest
    UnusualSpendingNotificationUseCaseTest
    

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119. THANK YOU
     Verify behaviour
     
     
     Mock roles, not objects
     
     
     Listen to your tests
     
     
     Leverage test doubles as a TDD tool
     @jakub_zalas
     @jakub_zalas
     @jakzal
     

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