Mocks and Stubs and Spies, oh my!

Slides from my introduction to test doubles talk given at DroidCon NYC

Transcript

1. Mocks and Stubs and Spies, Oh My! Brian Gardner
2. Test Double Hierarchy Test Doubles Mock Fake Spy Stub Dummy
3. Types of Tests
4. When to use Test Doubles? • System under test has indirect inputs • System under test has indirect outputs • Slow tests*
5. Indirect Inputs
6. Indirect Outputs
7. Slow Tests
8. Mocks
9. What is a Mock?
10. What is a Mock?
11. What is a Mock?
12. Mock Types Mocks Strict Lenient
13. Mock Usage
14. Mock Usage
15. Mock Usage
16. Mock Usage
17. Stubs
18. What is a Stub?
19. What is a Stub?
20. What is a Stub?
21. Stub Types Stubs Responder Saboteur Temporary
22. Stub Usage
23. Stub Usage
24. Stub Usage
25. Stub Usage
26. Spies
27. What is a Spy?
28. Spy Usage
29. Spy Usage
30. Spy Usage
31. Spy Usage
32. Dummies
33. What is a Dummy?
34. What is a Dummy?
35. Dummy Usage
36. Dummy Usage
37. Dummy Usage
38. Dummy Usage
39. Fakes
40. What is a Fake?
41. Fake Usage
42. Fake Usage
43. Fake Usage
44. Fake Usage
45. Term Confusion
46. Mocking Library
47. Mockito mocks
48. Mockito Stubs
49. Mockito Spies
50. Actual Mockito Spies
51. Mockito dummies
52. Mockito Fakes N/A
53. Recap • Use correct terms for more effective communication • Match test doubles to the appropriate tests • Don’t over use them
54. Who am I? Brian Gardner @BrianGardnerAtl