AndroidCodeCoverage.pdf

Transcript

1. ANDROID CODE COVERAGE Michal Jeníček, Android Engineer at STRV
2. !2 “Code coverage is not your enemy. It’s a tool to help you with development.“
3. JACOCO JAVA CODE COVERAGE !3 • Based on byte code, thus is for Kotlin too
4. MISSED INSTRUCTIONS & BRANCHES !4 • JaCoCo offers two main metrics
5. CODE COVERAGE SAMPLE !5
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12. CODE COVERAGE - DOES IT WORTH? !12 Code coverage analysis will • Help to find missing branches in unit testing • Help to keep in mind when there will be decreasing coverage with new code Code coverage analysis will NOT • Ensure, you have been writing tests right
13. CODE COVERAGE - WHEN TO USE !13 Whenever tests are written • It’s small effort to get helpful tool useful for checking our tests Whenever tests are executed on CI • It’s small effort to connect code coverage to continuous integration
14. RUN CODE COVERAGE !14
15. Intellij IDEA !15 • Analyse simple project locally (no standard outputs)
16. GRADLE PLUGIN DEFAULT TASK !16 • Analyse simple project for CI (instrumentation only)
17. GRADLE PLUGIN CUSTOM TASK !17 • Analyse complex project for CI
18. UNIT TEST ANALYSIS !18
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25. CI GIT INTEGRATION !25
26. CI BRANCH CHECKS !26 • Run checks with every push to branch automatically • Merge pull request / branch based on available checks
27. CIRCLE CI 2.0 !27
28. CIRCLE CI 2.0 !28
29. CIRCLE CI 2.0 !29
30. CIRCLE CI 2.0 !30
31. TRAVIS CI !31
32. TRAVIS CI !32
33. TRAVIS CI !33
34. TRAVIS CI !34
35. JENKINS PIPELINE !35
36. JENKINS PIPELINE !36
37. JENKINS PIPELINE !37
38. !38 JENKINS UI
39. CODE COVERAGE OUTPUTS !39
40. OUTPUTS STRUCTURE !40
41. OUTPUTS STRUCTURE !41
42. OUTPUTS STRUCTURE !42
43. OUTPUTS STRUCTURE !43
44. JACOCO LOCAL !44
45. JACOCO LOCAL !45
46. CODECOV !46
47. SAMPLE PROJECT !47
48. I have prepared stub of sample application to apply all kinds of code coverage ability. Sample application is built following way: • Single activity multi-module application • Navigation architecture component • MVVM approach • DI with Dagger • Connected to Travis, Circle CI, Jenkins CI & Codecov !48 HTTPS://GITHUB.COM/KOTOMISAK/IMAGE-ANALYZER-ANDROID
49. THAT'S IT Michal Jeníček michal.jenicek@strv.com
50. QUESTIONS