Hello, maybe I do something incorrect, but I can’t...

# multiplatform

[Aleksey Kornienko]

Hello, maybe I do something incorrect, but I can’t run unit test in multiplatform project for Android.
For example:

class AnalyticsTest {
    private lateinit var context: Context

    @Before
    fun setUp() {
        context = InstrumentationRegistry.getInstrumentation().targetContext
    }

    @After
    fun tearDown() {
    }
}

The error I get

java.lang.IllegalStateException: No instrumentation registered! Must run under a registering instrumentation.

It doesn’t work only in multiplatform project

[Aleksey Kornienko]

my build.gradle.kt

plugins {
    id("com.android.library")
    id("org.jetbrains.kotlin.multiplatform")
}

group = "com.devtodev"
version = "2.0"

android {
    compileSdkVersion(28)
    defaultConfig {
        minSdkVersion(16)
        targetSdkVersion(28)

        testInstrumentationRunner = "androidx.test.runner.AndroidJUnitRunner"

        useLibrary("android.test.runner")
        useLibrary("android.test.base")
        useLibrary("android.test.mock")
    }
    buildTypes {
        getByName("release") {
            isMinifyEnabled = false
            proguardFiles(getDefaultProguardFile("proguard-android.txt"), "<http://proguard-rules.pro|proguard-rules.pro>")
        }
    }

    sourceSets {
        val main by getting {
            setRoot("src/androidMain")
        }
        val test by getting {
            setRoot("src/androidTest")
        }
    }

    packagingOptions {
        exclude("META-INF/*.kotlin_module")
    }
}

kotlin {
    android {
        
    }

    iosX64 {
        binaries {
            framework {
                embedBitcode("disable")
            }
        }
    }
    iosArm32 {
        binaries.framework()
    }
    iosArm64 {
        binaries.framework()
    }

    sourceSets {
        fun dependants(name: String, targets: Set<String>) {
            val main = maybeCreate("${name}Main")
            val test = maybeCreate("${name}Test")
            for (target in targets) {
                maybeCreate("${target}Main").dependsOn(main)
                maybeCreate("${target}Test").dependsOn(test)
            }
        }

        val commonMain by getting {
            dependencies {
                implementation(kotlin("stdlib-common"))
            }
        }
        val commonTest by getting {
            dependencies {
                implementation(kotlin("test-common"))
                implementation(kotlin("test-annotations-common"))
            }
        }

        val androidMain by getting {
            dependencies {
                implementation("org.jetbrains.kotlin:kotlin-stdlib")
            }
        }

        val androidTest by getting {

        }

        val ios = setOf("iosX64", "iosArm32", "iosArm64")
        dependants("ios", ios)
    }
}


dependencies {
    androidTestImplementation("junit:junit:4.12")
    androidTestImplementation("org.jetbrains.kotlin:kotlin-test")
    androidTestImplementation("org.jetbrains.kotlin:kotlin-test-junit")

    androidTestImplementation("androidx.test:runner:1.1.1")
    androidTestImplementation("androidx.test:rules:1.1.1")
    androidTestImplementation("androidx.test.espresso:espresso-core:3.1.1")
}

[Aleksey Kornienko]

I think the reason is because kotlin directory don’t marked as Android JUnit

[yshrsmz]

I think you need robolectric

[yshrsmz]

@Aleksey Kornienko

[Aleksey Kornienko]

Yes, I hear about this framework, but at the moment I want to understand and solve the problem with Android JUnit 🙂

[yshrsmz]

I'm not sure if androidTest in mpp module means androidTest in ordinary android module.
But I can run androidTest with android classes if I use Robolectric, so I assume androidTest in mpp module runs on jvm, thus we need Robolectric if we want to use that InstrumentationRegistry

[Aleksey Kornienko]

Thanks for your reply! If it is really impossible at the moment robolectric can be a good variant.

[ribesg]

Are you sure your project is aware that you have sources in /kotlin ? The android plugin only expects /java by default. Or maybe I missed something

[Aleksey Kornienko]

Maybe you’r right, but I added this to my build.gradle.kts file and still have no effect 😞

sourceSets {
        val main by getting {
            setRoot("src/androidMain")
        }
        val test by getting {
            setRoot("src/androidTest")
        }

        getByName("androidTest").java.srcDirs("src/androidTest/kotlin")
    }

[Aleksey Kornienko]

Haha. Finally (after invalidate cache/restart) my test start work. Thank’s to all for help 🙂

[ribesg]

The good old “turn it off and on again”