What is the current state of `Kotlin` + `Jacoco`? Can I use `Jacoco` to get `JUnit` test coverage ...

# android

[igor.wojda]

What is the current state of Kotlin + Jacoco? Can I use Jacoco to get JUnit test coverage of Kotlin code? Does some one uses is on day to day basics? How mature is it currently with Kotlin?

[wasyl]

You can use it, but the reports aren’t very accurate, from my observations — IJ’s coverage is vastly different from Jacoco’s

[wasyl]

Things seem to be improving with new Jacoco versions, though

[igor.wojda]

This would explain why I haven’t seen many articles on this subject. Do more people agree with this ?

[wasyl]

Just to be clear, not very accurate doesn’t mean the metric is worthless — I’m using Jacoco and don’t plan turning it off. But I wouldn’t e.g. set coverage targets

[wasyl]

As for articles — it may be due to the fact that there’s nothing different in configuring Jacoco with Java vs Kotlin 🙂

[Icaro Temponi]

I use it and the only problem I had so far is that Jacoco can't detect code coverage of inline functions.

[changd]

☝️ Same here
https://issuetracker.google.com/issues/109771903

[changd]

Supposedly, this is fixed in AGP 3.4, but we are currently on 3.2.1 and bumping requires herculean effort.