Android studio code coverage not showing any Kotlin classes

Try to use JaCoco for coverage, this is a IntelliJ IDEA issue: Kotlin inline keyword causing IntelliJ IDEA Coverage reporting 0%

How to use JaCoco to get the coverage: Making Android Studio Test Coverage works

Resume:

1. Click on edit configurations

2. Go to Run/Debug Configurations -> Defaults -> Android JUnit -> Code Coverage

3. Choose coverage Runner: Select JaCoCo

4. Apply -> OK

5. Run your test again and voila you will get the coverage