> For the complete documentation index, see [llms.txt](https://lin-4.gitbook.io/test/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://lin-4.gitbook.io/test/mutation.md).

# jacoco\&mutation

jacoco: if the quantity of the unit test is enough.

mutation: if the quality of the unit test is good.

## 1. Jacoco

jacoco: cover those branches, all of the possible way to get to each line.

there are 8 branches for try with resource block. actually, there is only 6. hardly to cover them.

## 2. Mutation

<https://www.baeldung.com/java-mutation-testing-with-pitest>

mutation: if the boundary or condition has changed, the unit test should fail, killed. Or survived which means the unit test is not good.