TDD in Xcode Playgrounds

Apart from being an awesome code prototyping tool, the Xcode Playgrounds can also be used for Test Driven Development.

In this short talk, Paul will show you how to unit test your code using Playgrounds, how to make use 3rd party libraries and generally how to avoid the excuse of testing being too hard :)

Transcript

1. TDD using Xcode Playgrounds
   
   Paul Ardeleanu
   @pardel
   

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2. TDD using Xcode Playgrounds - London, March 2017 @pardel
   Test Driven Development
   
   

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3. TDD using Xcode Playgrounds - London, March 2017
   
   @pardel
   TDD
   according to Wikipedia
   “Test-driven development (TDD) is a software development process
   that relies on the repetition of a very short development cycle:
   requirements are turned into very specific test cases, then the
   software is improved to pass the new tests, only. This is opposed
   to software development that allows software to be added that is not
   proven to meet requirements.”
   https://en.wikipedia.org/wiki/Test-driven_development
   

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4. TDD using Xcode Playgrounds - London, March 2017 @pardel
   Test Driven Development
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5. TDD using Xcode Playgrounds - London, March 2017
   
   @pardel
   Pick a feature to implement
   making sure it’s a small enough unit.
   FEATURE
   Change any of the existing code
   making sure ALL tests are passing.
   REFACTOR
   Write a failing test.
   Stop as soon as you get a failure.
   RED
   Write code to pass the test.
   Write as little code as possible.
   GREEN
   L (
   )
   TDD lifecycle
   Feature, Red, Green, Refactor
   

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6. TDD using Xcode Playgrounds - London, March 2017
   
   @pardel
   New
   feature
   create test
   enough code to
   make it pass
   successful
   test execution
   No
   anything to
   refactor
   Yes
   Yes
   refactoring
   No
   Ya Ain’t Gonna Need It
   TDD lifecycle
   Feature, Red, Green, Refactor
   

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7. TDD using Xcode Playgrounds - London, March 2017 @pardel
   Testing in iOS
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8. TDD using Xcode Playgrounds - London, March 2017
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   @pardel
   Testing in iOS
   XCTest - Xcode 5
   

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9. TDD using Xcode Playgrounds - London, March 2017
   
   @pardel
   Testing in iOS
   XCTest - Xcode 5
   

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10. TDD using Xcode Playgrounds - London, March 2017 @pardel
    Demo
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11. TDD using Xcode Playgrounds - London, March 2017 @pardel
    Unit tests
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12. TDD using Xcode Playgrounds - London, March 2017 @pardel
    
    m.pardel.net
    

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13. TDD using Xcode Playgrounds - London, March 2017 @pardel
    leanpub.com/test-gtfo
    

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14. TDD using Xcode Playgrounds - London, March 2017 @pardel
    

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15. TDD using Xcode Playgrounds - London, March 2017
    
    @pardel
    TDD Workshop
    

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16. TDD using Xcode Playgrounds - London, March 2017 @pardel
    Thank you!
    paul@lupo.uk
    

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