Is there a way to mark custom Kotlin source set as a "test source set" in IDEA via Gradle? I know that there is a way to mark standard Gradle source set (via

idea { module { testSources.from(<path to the source directory>) } }

). But Kotlin source sets are not standard Gradle source set... (Here is the use case.) I have a project with separate benchmarks source set. (Which is used in kotlinx.benchmark.) And benchmark tasks are marked as test ones. But the source set is not. So I want to "fix" the difference.

is your project Kotlin/JVM or Multiplatform?

Kotlin/Multiplatform. But soltion for Kotlin/JVM are appreciated too.

for JVM there's the Test Suite plugin - it works really well. You can make a separate test suite for your benchmarks, and IntelliJ will understand it https://docs.gradle.org/current/userguide/jvm_test_suite_plugin.html

Yeah, I didn't know about that. Thank you very much!

for a separate source set in Kotlin/Multiplatform, you can try the following: 1. create a new source set, e.g.

commonBenchmarkTests

, that depends on

commonTest

2. create a new platform specific source set, e.g.

jvmBenchmarkTests

, that depends on the common benchmark source set, and

jvmMain

3. tell Kotlin that the JVM target should compile the

jvmBenchmarkTests

source set

kotlin {
    jvm()

    sourceSets {
        val commonMain by getting { }
        val commonTest by getting { }

        val jvmMain by getting { }
        val jvmTest by getting { }

        val commonBenchmarkTests by creating {
            description = "Common benchmarks"
            dependsOn(commonMain)
        }

        val jvmBenchmarkTests by creating {
            description = "JVM benchmarks"
            dependsOn(jvmMain)
            dependsOn(commonBenchmarkTests)
        }

        jvm {
            compilations["test"].source(jvmBenchmarkTests)
        }
    }
}

IntelliJ seems to mark the new source sets as 'test', but I didn't try and compile it.