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Test-Driven Development for iOS

Avatar for Maksym Koshtenko Maksym Koshtenko
April 16, 2015
Programming
130
0

Test-Driven Development for iOS

9th iOS Practice Leaders Community Meet-up

Avatar for Maksym Koshtenko

Maksym Koshtenko

April 16, 2015

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Transcript

  1. Test-Driven ! Development

  2. Debugging sucks! Testing rocks!

  3. Traditional flow Design Implement Test

  4. Test-driven flow Design Implement Test

  5. Test-driven flow Design Implement Test Test

  6. Test-driven flow Design Implement Test Test

  7. Test-driven flow Design Implement Test Test Figure out what you

    want to do

  8. Test-driven flow Design Implement Test Test Write a test to

    express the design 
 It should FAIL

  9. Test-driven flow Design Implement Test Test Write the code

  10. Test-driven flow Design Implement Test Test Test again 
 It

    should PASS

  11. Add a test Each new feature begins with writing a

    test Focus on the requirements before writing the code

  12. Run all tests Check that changes are required and test

    passes only in intended cases

  13. Write a code Write simplest and inelegant code to make

    test pass Use hardcodes where possible

  14. Run tests Adjust code until it meets the test requirements

  15. Refactor code Cleanup your code! Don’t worry, test covers you

  16. What is TDD? Red Refactor Green 1. Write tests! 2.

    Implement changes! 3. Cleanup code

  17. Bug fixing 1. Find bad code ! 2. Turn it

    into a test ! 3. Test should fail ! 4. Fix bug ! 5. Test should now pass

  18. Advantages of TDD

  19. Advantages of TDD No more repeat bugs 
 
 


    


  20. Advantages of TDD No more repeat bugs 
 Better design

    
 
 


  21. Advantages of TDD No more repeat bugs 
 Better design

    
 Quick feedback 
 


  22. Advantages of TDD No more repeat bugs 
 Better design

    
 Quick feedback 
 Easy refactoring 


  23. Advantages of TDD No more repeat bugs 
 Better design

    
 Quick feedback 
 Easy refactoring 
 Great code coverage

  24. YOU! know ! TDD

  25. Sources http:/ /www.amazon.com/Art-Unit-Testing-Examples-Net/dp/1933988274! http:/ /www.amazon.com/Test-Driven-iOS-Development-Developers-Library/dp/0321774183 ! http:/ /www.objc.io/issue-1/testing-view-controllers.html! http:/ /qualitycoding.org/benefit-of-tdd/#more-2618!

  26. None

  27. Live Coding

  28. https:/ /github.com/maksumko/TDD-iOS-Demo