9_ways_to_test_your_spaghetti_code_-_Devoxx_Ukraine.pdf

Transcript

1. Devoxx Ukraine
   9 ways to test your
   spaghetti code
   Mads Opheim
   @MadsOpheim
   

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2. Goal of this talk:
   You’ll be inspired and
   enabled to test your
   legacy code
   2
   

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3. What is
   spaghetti
   code?
   3
   

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4. Precondition:
   You are creative
   The computer is not
   4
   

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5. 1. Extract interface
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7. 7
   2. Set your
   dependencies
   

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9. Singletons
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10. 3. Package-protect
    problematic parts
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12. 4. Consider removing final
    12
    

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13. Well-designed code is
    testable code
    13
    

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14. 14
    5. Help your team
    

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15. 6. Run your tests - and care
    15
    

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16. 7. Feature toggles
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17. 8. One class !=
    one test class
    17
    

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18. 9. Test-driven
    development
    18
    

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19. Test-driven
    spaghetti
    19
    

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20. Give me
    more
    @lisacrispin, @lisihocke,
    @techgirl1908...
    20
    

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21. Key takeaways
    21
    1. Good code design improves testability
    2. Short-term sacrifices are ok
    3. Write tests for you legacy code -
    you can do it!
    

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22. спасибі!
    22
    @MadsOpheim
    mads.opheim@computas.com
    

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