Did anyone figure out how to configure JaCoCo in a KMM project? It started with the Compose for Desk...

# multiplatform

[Stefan Oltmann]

Did anyone figure out how to configure JaCoCo in a KMM project? It started with the Compose for Desktop Template (from the Wizard), but it does not seem possible to activate JaCoCo if also the "android-library" plugin is applied.

So is there no way to report code coverage to sonarqube via gradle in Multiplatform projects?

[Rak]

FYI, jacoco is not working with kotlin 1.5

[Stefan Oltmann]

Is that a Kotlin or a JaCoCo problem? Is Kotlin producing invalid Java bytecode here?

[kenkyee]

Jacaco fixed those issues in 0.8.7:
https://www.jacoco.org/jacoco/trunk/doc/changes.html

[CLOVIS]

Jacoco works fine with Kotlin 1.5 & 1.5.10 if you use the latest version: https://gitlab.com/clovis-ai/formulaide/-/blob/main/server/build.gradle.kts#L41

[Stefan Oltmann]

Yeah, but that's a JVM project.

My project is Kotlin Multiplatform like this: https://github.com/JetBrains/compose-jb/blob/master/templates/multiplatform-template/common/build.gradle.kts

[Stefan Oltmann]

The JaCoCo Plugin can be added, but it does not even generate tasks. Nothing works.

[Stefan Oltmann]

And it seems not be an Kotlin 1.5 problem because 1.4.32 does not work either

[Stefan Oltmann]

It's hard to believe nobody working on a KMM library tracks code coverage in SonarQube/Codecov right now 🤔

[CLOVIS]

Jacoco is a JVM analysis tool, it's not going to work on other platforms. If you want coverage in other platforms, you'll have to find an equivalent tool there.

[Stefan Oltmann]

I want coverage for "jvmMain"

[Stefan Oltmann]

I'm aware of that. I just want to coverage the java code

[Stefan Oltmann]

But that does not work

[Stefan Oltmann]

How do I have to configure that project that I get code coverage for the java part?

[Stefan Oltmann]

Nice to see that the team is actually working on a code coverage tool. It's really needed.

[Carter]

Jacoco coverage works fine for multiplatform, and will work for code under commonMain and jvmMain.

val isCoverageEnabled = run {
    val isCoverageEnabled: String by project
    isCoverageEnabled.toBoolean()
}
if (isCoverageEnabled) {
    apply(plugin = "java-library")
    apply(plugin = "jacoco")

    configure<JacocoPluginExtension> {
        val jacocoVersion: String by project
        toolVersion = jacocoVersion
    }

    afterEvaluate {
        tasks.withType<JacocoReport>().configureEach {
            classDirectories.setFrom(
                fileTree("${buildDir}/classes/kotlin/jvm/") {
                    exclude("**/*Test*.*", "**/*Fixture*.*")
                }
            )

            sourceDirectories.setFrom(
                // This could be better if it dynamically got the source directories, e.g. more along the lines of
                // kotlin.sourceSets["commonMain"].kotlin.sourceDirectories,
                // kotlin.sourceSets["jvmMain"].kotlin.sourceDirectories
                listOf("src/commonMain/kotlin", "src/jvmMain/kotlin")
            )
            executionData.setFrom("${buildDir}/jacoco/jvmTest.exec")
        }
    }
}

[Carter]

Then
./gradlew check -PisCoverageEnabled=true; ./gradlew jacocoTestReport -PisCoverageEnabled=true

[Carter]

I found it necessary to run the check and jacocoTestReport tasks serially.

[Stefan Oltmann]

Thanks. Do you have Android in your KMM project?

Running this I get The 'java' plugin has been applied, but it is not compatible with the Android plugins.

[Stefan Oltmann]

Because the shared common project imports also

id("com.android.library")

[Stefan Oltmann]

And without applying

java-library

there seems to be no jaCoCoTestReport Task

[Stefan Oltmann]

I tried to add your code here:
https://github.com/JetBrains/compose-jb/blob/master/templates/multiplatform-template/common/build.gradle.kts

[Carter]

My project is multiplatform compose app with common, java (compose desktop), and javascript (compose web).

Android has its own configuration for coverage. I’ve only configured Android independently of the other platforms.

[Stefan Oltmann]

Ah, ok, thank you.

[Stefan Oltmann]

Maybe it's just KMM modules with Android that can't have jacoco coverage