Mutation testing

Code coverage

• Example - Pitest

• Changing the code and see if it breaks the test

• Can take a long time

  • but can store the data, then on the next time can run the tests on the delta

• Much better than doing code coverage via lines hit

• https://journal.optivem.com/p/code-coverage-vs-mutation-testing

Issues

• https://mail.google.com/mail/u/0/?tab=wm#inbox/FMfcgzGqQJlfVkwPHWjQbPPfkQGcPJnB

• https://testing.googleblog.com/2021/04/mutation-testing.html