JVM Integration Tests with the Android Gradle Plugin. ATTENTION: Does not work!

build.gradle

android.applicationVariants.all { variant ->
    configurations.create("${variant.name}IntegrationTestImplementation") {
        extendsFrom configurations.find { it.name == "implementation" }
        extendsFrom configurations.find { it.name == "${variant.name}Implementation" }
    }

    def sourceSet = android.sourceSets.create("${variant.name}IntegrationTest") {
        // this fails here because `compileClasspath` is not existant in `AndroidSourceSet`
        compileClasspath += variant.javaCompile.classpath
        runtimeClasspath += variant.javaCompile.classpath
    }

    task "test${variant.name.capitalize()}IntegrationTest"(type: Test) {
        description = "Runs integration tests for variant ${variant.name}"
        group = 'verification'
        testClassesDirs = sourceSet.output.classesDirs
        classpath = sourceSet.runtimeClasspath
    }
}