Test-driven development with PHPUnit

Transcript

1. Test-driven
   

   development
   

   with PHPUnit
   Oliver Klee, 2022-08
   @oliklee | Mastodon: oliklee@chaos.socail | typo3-coding@oliverklee.de
   

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2. About me
   Oliver „Oli“ Klee
   
   
   #bonn
   
   
   #extension-dev
   
   
   #workshop-teacher
   
   
   #unit-testing-guy
   
   
   #phpstan-guy
   
   
   #typo3-ombudsperson
   
   
   #typo3-quality-assurance-initiative
   
   
   #gami
   fi
   cation-working-group
   
   
   #game-cooking
   
   
   #powermetal
   

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3. ???
   

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4. The goals
   ✓ You have a clearer
   understanding on
   how TDD works.
   ✓(optional) You get
   test-infected.
   ✓You learn at least 1
   new testing pattern.
   ✓We all have fun.
   

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5. The travel plan
   1. getting starte
   d
   
   2. concepts & term
   s
   
   3. testing pattern
   s
   
   4. hands-o
   n
   
   5. naming test
   s
   
   6. hands-o
   n
   
   7. ending & feedback
   

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6. The rules
   
   
   1. There are no
   stupid questions.
   
   
   2. The joker rule.
   

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7. The travel plan
   1. getting starte
   d
   
   2. concepts & term
   s
   
   3. testing pattern
   s
   
   4. hands-o
   n
   
   5. naming test
   s
   
   6. hands-o
   n
   
   7. ending & feedback
   

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8. Unit

   Tests?
   

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9. Manual testing is cumbersome
   

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10. Automated

    testing
    

    is fast
    

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11. Unit tests for the
    

    TYPO3 Core
    

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12. Unit Tests

    406 (144) tests/s
    

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13. Functional Tests

    8.13 (1.97) tests/s
    

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14. Acceptance Tests

    .009 (.003) tests/s
    

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15. Verify that your code
    does what you expect
    

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16. Make sure that
    

    your changes won‘t

    break anything
    

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17. Keep others
    

    from breaking your code
    

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18. Don’t break anything
    

    even in complex
    

    projects
    

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19. Create a safety net
    
    for refactoring
    or for
    

    TYPO3 updates
    

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20. Improve
    the structure
    of your code
    

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21. Find the location of bugs
    

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22. Green feels good!
    

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23. Let’s get

    some terms

    straight
    

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24. The two programming modes
    clean
    hacky
    

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25. Testsuite
    Testcase
    Test
    Assertion
    Test
    Test
    Testcase
    

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26. The life cycle of a test
    new FooTest();
    setUp();
    /** @test */
    
    
    lifeIsGood();
    tearDown();
    

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27. Code test-first
    write

    test
    write

    code
    refactor
    

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28. The travel plan
    1. getting starte
    d
    
    2. concepts & term
    s
    
    3. testing pattern
    s
    
    4. hands-o
    n
    
    5. naming test
    s
    
    6. hands-o
    n
    
    7. ending & feedback
    

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29. The travel plan
    1. getting starte
    d
    
    2. concepts & term
    s
    
    3. testing pattern
    s
    
    4. hands-o
    n
    
    5. naming test
    s
    
    6. hands-o
    n
    
    7. ending & feedback
    

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30. https://github.com/TYPO3-Documentation/tea/
    
    
    Branch: workshop/t3dd22
    
    
    File: Exercises.md
    

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31. The travel plan
    1. getting starte
    d
    
    2. concepts & term
    s
    
    3. testing pattern
    s
    
    4. hands-o
    n
    
    5. naming test
    s
    
    6. hands-o
    n
    
    7. ending & feedback
    

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32. Naming

    Tests
    

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33. Use meaningful test names
    
    classCanBeInstantiated
    setTitleSetsTitle
    setSizeWithZeroThrowsException
    
    
    hasTitleForEmptyTitleReturnsFalse
    Name the
    behavior.
    Name the
    preconditions.
    Name the
    method.
    Don’t use
    

    “works” or
    

    “works correctly”.
    measureFrubbleWorksCorrectly
    

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34. The travel plan
    1. getting starte
    d
    
    2. concepts & term
    s
    
    3. testing pattern
    s
    
    4. hands-o
    n
    
    5. naming test
    s
    
    6. hands-o
    n
    
    7. ending & feedback
    

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