How can Kotlin operator functions be covered in te...

# android

[Ali Kabiri]

How can Kotlin operator functions be covered in test reports?

Since kotlinx-kover does not support instrumentation tests executed on Android device, I am still using a Jacoco gradle task for generating code coverages.

In this case, operator fun 's signature is marked uncovered by Jacoco, although the method body is being covered (see screenshot)!

How can I cover the method signature? Would there be any workaround to cover it?

[marlonlom]

Did you add unit tests for the suspend function?
afaik, when running the jacoco report, it takes the coverage for unit tests and not for the instrumented ones

[Ali Kabiri]

Yes, it is configured to merge execution data for both unit and instrumented tests.

More Info: https://github.com/trustedshops-public/etrusted-android-trustbadge-library/blob/48[…]93b6a6000f8873c0b9cfb6e93a0c315088be37/library/build.gradle.kts

[chanjungskim]

I guess coverage is just for unit test?

[Ali Kabiri]

@chanjungskim Good point, but that doesn't seem to be the case, since the existing coverage is also coming from instrumented tests.

If it helps, feel free to view/clone the project here:

https://github.com/trustedshops-public/etrusted-android-trustbadge-library

You can run all the tests with coverage from commandline using:

bundle exec fastlane test

The HTML coverage file will be under following path:

library/build/mergedReportDir/jacocoTestReport/html/index.html

[Nino]

Problems are:
• Jacoco doesn't understand Kotlin magic, giving an incorrect coverage for Kotlin classes
• Kover does understand Kotlin magic, giving a correct coverage for Kotlin classes
and

• Jacoco can parse Android execution tests ("end to end" / "ui" / Espresso/Barista/younameit tests)
• Kover cannot (yet ! it's their target for 1.0 release) parse Android execution tests.

[Ali Kabiri]

Thank you so much for clarifying the problem :)
I wish there could also be a workaround for it. 🙂