2016 java-sig-mutation-testing
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The document is an introduction to mutation testing presented by Jeanne Boyarsky. It discusses how mutation testing can determine if test cases are good beyond just test coverage by introducing faults into code to see if tests catch the errors. The presentation demonstrates using PitClipse, a tool that makes mutation testing easy to run, and shows test results including mutants that were killed and survived. Tips are provided on using mutation testing including ensuring initial tests pass and watching the console output.
2016 java-sig-mutation-testing
- 1. Intro to Mutation Testing slideshare.net/boyarsky Twitter @jeanneboyarsky Blog: http://www.selikoff.net Jeanne Boyarsky NY Java SIG 12/5/16
- 2. @jeanneboyarsky Pause for a Commercial
- 3. Why write tests? @jeanneboyarsky It used to work!
- 4. How know if tests are good? @jeanneboyarsky
- 5. If test coverage low @jeanneboyarsky Write more tests! Not ready for mutation testing of class
- 6. If test coverage high @jeanneboyarsky All done! Perfect code!
- 7. Or is it?Why is it saying nobody is registered?
- 8. Code Review!
- 11. PitClipse to the rescue!
- 12. Easy to run
- 13. The console flies by
- 14. We caught 5 mutants
- 15. More detail
- 17. Level up
- 18. Now 32 survived
- 19. Demo
- 20. Tips • JUnit tests must pass • Watch console to see if still running • Reports on whole project • Fixing one may take care of more @jeanneboyarsky
Editor's Notes
- #3: https://upload.wikimedia.org/wikipedia/commons/thumb/8/83/Menora.svg/2000px-Menora.svg.png http://res.freestockphotos.biz/pictures/12/12628-illustration-of-a-decorated-christmas-tree-pv.png https://upload.wikimedia.org/wikipedia/commons/thumb/d/d8/Kwanzaa_Candles-Kinara.svg/2000px-Kwanzaa_Candles-Kinara.svg.png https://upload.wikimedia.org/wikipedia/commons/thumb/5/53/Happy_Festivus.jpg/320px-Happy_Festivus.jpg
- #4: https://cdn.pixabay.com/photo/2012/05/07/05/18/bug-48020_1280.png https://pixabay.com/p-303966/?no_redirect
- #5: http://www.eclemma.org/jacoco/trunk/coverage/
- #6: https://pixabay.com/p-149251/?no_redirect
- #8: https://pixabay.com/p-1300226/?no_redirect
- #10: http://www.publicdomainpictures.net/pictures/180000/velka/mutant-female-41.jpg
- #11: http://orig01.deviantart.net/920f/f/2015/013/a/8/teenage_mutant_ninja_turtles__2003__drawing__by_n0rvv3g14n_g1rl-d8drynd.jpg