How to setup Kover for multi module project with Android & Kotlin modules

Question

I have multi module project with both Android & Kotlin modules.

To simplify I have the following modules:

:data is an Android module. This just has the variants debug and release.
:domain is a Kotlin module.

To setup code coverage I applied the Kover plugin to all modules. I use the latest version (which is 0.9.1 at the time of writing).

Now I could just run an individual task for each module like :data:koverHtmlReportDebug and :domain:koverHtmlReport but I need to create a merged report, otherwise the tests that span multiple modules are not taken into account for the coverage.

So to do this I specified a dependency kover(project(":domain")) in the :data module.

Now if I run :data:koverHtmlReportDebug it doesn't automatically run the coverage for :domain (maybe because it doesn't have the debug variant?). Then if I run :data:koverHtmlReport it does run the coverage for :domain, but it does so for each variant, which takes way longer and is not what I want.

I also tried creating a custom variant so I can specify the correct variant manually, but since domain has no variant, this doesn't work either.

I used this documentation: https://kotlin.github.io/kotlinx-kover/gradle-plugin/#kotlin-multi-module-android-project

And I found a question on GitHub for the same problem. This however was for a way older version and I couldn't get this to work: https://github.com/Kotlin/kotlinx-kover/issues/422

Any suggestions on how to implement Kover correctly for my project?

Wirling · Accepted Answer · 2025-03-12 13:04:44Z

1

I also posted this question on the official GitHub repo. I was on the right track by creating a custom variant. The problem I was having is that :domain has no variants. This is fixed by adding jvm in the :domain module:

kover {
    currentProject {
        createVariant("custom") {
            add("jvm")
        }
    }
}

answered Mar 12 at 13:04

Wirling

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