3 Steps Every Test Should Take

Transcript

1. 3 Steps Every Test
   Should Take
   

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2. About me
   Matheus Richard
   

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3. This is a ⚡lightning talk⚡,
   so I’m gonna go FAST
   󰝊💨
   

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4. 🧪 Tests
   

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5. 😄 Tests are good!
   They make us more productive. Right?
   

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6. ❌ WRONG!
   

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7. ✔Good tests are good
   

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8. 🐢 Poorly written tests
   slow us down!
   

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9. Developer happiness-meter: 🙁
   🐌 Slow tests
   

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10. Developer happiness-meter: 😞
    🤔 Confusing tests
    🐌 Slow tests
    

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11. 󰣽 Flaky tests
    Developer happiness-meter: 😠
    🤔 Confusing tests
    🐌 Slow tests
    

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12. 󰣽 Flaky tests
    Developer happiness-meter: 🤬
    🤔 Confusing tests
    📦 Brittle tests
    🐌 Slow tests
    

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13. 🐌 Slow tests
    󰣽 Flaky tests
    📦 Brittle tests
    🤔 Confusing tests
    

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14. Good tests tell a story
    

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15. The story has 4 acts
    

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16. 📝 1. Setup
    

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17. 📝 1. Setup Create objects
    Define function inputs
    

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18. 📝 1. Setup
    🏋 2. Exercise
    

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19. 📝 1. Setup
    🏋 2. Exercise Calling methods
    Saving objects to DB
    

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20. 📝 1. Setup
    🏋 2. Exercise
    󰡷 3. Verify
    

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21. 📝 1. Setup
    🏋 2. Exercise
    󰡷 3. Verify Check if the output
    is the expected
    

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22. 📝 1. Setup
    󰡷 3. Verify
    🏋 2. Exercise
    💥 4. Teardown
    

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23. 📝 1. Setup
    󰡷 3. Verify
    🏋 2. Exercise
    💥 4. Teardown Undo changes
    Release memory
    Restore DB
    

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24. 📝 1. Setup
    🏋 2. Exercise
    󰡷 3. Verify
    💥 4. Teardown
    You’re welcome!
    

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25. 📝 1. Setup
    󰡷 3. Verify
    🏋 2. Exercise
    

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26. 📝 1. Arrange
    󰡷 3. Assert
    🏋 2. Act
    aka
    

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27. 📝 1. Given
    󰡷 3. Then
    🏋 2. When
    aka
    

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31. 🤨 Why is this good?
    

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32. Consistency
    

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37. E
    X
    E
    R
    C
    I
    S
    E
    

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38. Tests are self-contained.
    No mystery guests here
    

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40. 1. Verify
    Developer confusion-meter: 🤔❓
    

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41. 1. Verify 2. Exercise + Setup
    Developer confusion-meter: 🥴⁉
    

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42. 1. Verify 2. Exercise + Setup? 3. Verify
    Developer confusion-meter: 😵
    

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43. Developer confusion-meter: 😵
    

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44. Developer happiness-meter: 🥰
    

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45. SPACE IS IMPORTANT
    Developer happiness-meter: 🥰
    

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46. Developer happiness-meter: 😐
    

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47. Developer happiness-meter: 🥰
    

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48. Good tests have
    4 3 steps
    

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49. 📝 1. Setup
    

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50. 📝 1. Setup
    🏋 2. Exercise
    

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51. 📝 1. Setup
    󰡷 3. Verify
    🏋 2. Exercise
    

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52. We need not only tests,
    but good tests!
    

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53. We want good code and
    tests are code too!
    

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54. That’s it
    Feel free to ask any question
    

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