I’ve multiple modules in a KMP project: some `comm...

# multiplatform

[Daniele Segato]

I’ve multiple modules in a KMP project: some commonTest in different modules share the same utility methods (stuff like Clock implmentation) and I’d like to make a “test utility library” module for KMP that I can add as dependencies in my commonTest as needed

If I try to create a regular KMP project :shared:common:test with Android, iOS and JVM targets and add it as dependency to the commonTest sourceSet I get these errors:

:shared:moduleA:iosArm64Test: Could not find :shared:common.
:shared:moduleA:iosSimulatorArm64Test: Could not find :shared:common.
:shared:moduleA:iosX64Test: Could not find :shared:common.
:shared:moduleA:jvmTest: Could not find :shared:common.

Working only in Android i could create a plain JVM project and include it as a testImplementation in my test to share test code between modules

I’ve found this YouTrack issue which might be related but it say, quote

it has been possible to write such libraries pretty much since the beginning of Kotlin Multiplatform

Can someone provide me with a basic build.gradle.kts that would allow me to make a test library I can include in commonTest?

[Daniele Segato]

Does anyone know if this is possible or if I'm doing something wrong? Thanks

[CLOVIS]

It's hard to say what's wrong in your case because you don't give any info about your setup. But yeah, you can create a module that contains only testing utilities, here's on repository that does that (:tester is imported into the tests of most other modules): https://gitlab.com/opensavvy/groundwork/pedestal/-/tree/e58f2f2c826bdd754f6925a6b6c390b1b70483df

[Daniele Segato]

Yeah, sorry, it's because I use convention plugins.

Thank you I'll look at that module and try to find differences with mine!

[Daniele Segato]

What kind of information would you need from my setup?

[CLOVIS]

Honestly, I don't even know, it could be because of so many different things. Probably the simplest solution is if you look at the repo I provided, and ask if there's something you don't understand, and we'll end up finding what's different that way

[Daniele Segato]

Thank you. It's late here. I'll look into it tomorrow morning

[Daniele Segato]

So what I’m seeing here is that I also need to look at https://gitlab.com/opensavvy/automation/gradle-conventions cause those are what this project uses

the only things that pops out for me here are these

in the kotlin.base

It uses this plugin id("org.jetbrains.kotlin.plugin.power-assert")
which I don’t think is needed

it does this

tasks.withType<Test>().configureEach {
	useJUnitPlatform()
}

which I’m not sure what is needed for

and apply a java toolkit, which I don’t because I prefer to specify the target version for each module instead (but JVM shouldn’t be the problem here)

[Daniele Segato]

(I do not use junit 5)

[CLOVIS]

So what I’m seeing here is that I also need to look at https://gitlab.com/opensavvy/automation/gradle-conventions cause those are what this project uses

Nothing in that repository is needed for what you're doing, there are older versions of the repository which don't use it and the :tester module worked well

[Daniele Segato]

There's nothing particular that repository do... Which means it's something "I" do that causes the issue?
However I don't think I'm doing anything weird

[Daniele Segato]

So I removed all the plugin convention I had and I can still reproduce it with this simple build.gradle,kts

plugins {
  alias(libs.plugins.kotlin.multiplatform)
  alias(libs.plugins.android.library)
}

kotlin {
  androidTarget()
  jvm()
  iosX64()
  iosArm64()
  iosSimulatorArm64()

  sourceSets {
    commonMain {
      dependencies {
        implementation(libs.kotlin.test)
        implementation(libs.kotlinx.datetime)
        implementation(libs.coroutines.core)
        implementation(libs.coroutines.test)
      }
    }

    commonTest {
      dependencies {
      }
    }

    androidMain {
      dependencies {
      }
    }

    androidInstrumentedTest {
      dependencies {
      }
    }

    iosMain {
      dependencies {
      }
    }
  }
}

plugins are:
• org.jetbrains.kotlin.multiplatform:2.1.10
• com.android.library:8.10.0-alpha07
all i do with this is add it as dependency to another KMP project in the commonTest

:shared:other:iosArm64Test: Could not find :shared:common.
Required by:
project :shared:other

where the dependency is just:

commonTest {
      dependencies {
        implementation(":shared:common:test")
      }
    }

[Daniele Segato]

🤦‍♂️ i didn’t write project() in the dependency…. and I just kept not seeing it

[CLOVIS]

oh wow, yeah that's it

[Daniele Segato]

I feel extremely dumb now - thanks for making me go through it again @CLOVIS - and the repository you linked is interesting I’ll look into it more cause I saw it do things that I didn’t know I could do with gradle!
sorry for wasting your time!

[CLOVIS]

no problem, I didn't do much this time! Always happy to help