TestCaseID which covered the specific line in source code?

[sridh...@gmail.com]

Hi Team,

We have a need where we need to know which were the list of test cases that covered a specific lines in a given class. is it possible to track that kind of information in jacoco?

We want to get the list of test cases that covered a specific method in a given class so that, we will run only those test cases if that method is modified in future for regression.

Can you please provide the details?

Thanks,
Sridhar

[Marc Hoffmann]

Hi Sridhar,

JaCoCo does not support this out of the box.

Sonarqube used to provide a "per test coverage" view for JaCoCo:

https://docs.sonarqube.org/display/PLUG/Usage+of+JaCoCo+with+Java+Plugin

Basically what you need to do to implement such a feature on your own:

- Hook into your test framework (e.g. with a JUnit execution listener)
- Dump and reset exec data after every test
- Do coverage analysis for every test
- Combine the coverage data to see which test contributed to which line.

Cheers,
-marc