org.koin.android.error.MissingAndroidContextException: when try to test app with context

Question

I want to write test for koin. I use RoomDatabase, which receives context in constructor. App works well but test fails

Can't resolve Application instance. Please use androidContext() function in your KoinApplication configuration.

jins joseph · Answer 1 · 2019-06-04T04:59:35.600

7

if you want context in your modules, you should pass context in your start koin method

// start Koin!
    startKoin {

      // declare used Android context
      androidContext(this@MyApplication)

      // declare modules
      modules(yourModule)
    }

and use these libraries

    // Koin AndroidX Scope features
    implementation "org.koin:koin-android-scope:2.0.1"
// Koin AndroidX ViewModel features
    implementation 'org.koin:koin-androidx-viewmodel:2.0.1'
// Koin AndroidX Experimental features
    implementation "org.koin:koin-android-ext:2.0.1"

edited Jun 04 '19 at 04:59

answered Jun 03 '19 at 11:30

jins joseph

271
1
11

1

in my case, it does not work, have you experienced this? – Nurseyit Tursunkulov Jun 04 '19 at 04:56
so again you got the same error after using new koin libraries? can you post your error log? with your qtn – jins joseph Jun 04 '19 at 05:00
org.koin.android.error.MissingAndroidContextException: Can't resolve Context instance. Please use androidContext() function in your KoinApplication configuration. – Nurseyit Tursunkulov Jun 04 '19 at 05:19
i give the answer according to your exception that shown in the question..i think your module definition gets wrong.please make sure that context passed correctly – jins joseph Jun 04 '19 at 05:22
startKoin{ androidLogger() androidContext(this@MyApp) modules(appModule) } – Nurseyit Tursunkulov Jun 04 '19 at 05:25
val appModule = module { single { GameProcessDataBase.getInstance(androidContext()).gameProcesDao()} } – Nurseyit Tursunkulov Jun 04 '19 at 05:25
single { GameProcessDataBase.getInstance(androidApplication()) } and define your dao in database class..it will work perfectly – jins joseph Jun 04 '19 at 05:28

score 4 · Answer 2 · answered May 31 '19 at 06:12

4

Make sure to set your context when you start koin. Then you should be able to access it via androidContext() in your modules.

startKoin {
    androidContext(this@App)
    modules(...)
    ...
}

answered May 31 '19 at 06:12

woodii

763
7
23

in my case, it does not work, have you experienced this? – Nurseyit Tursunkulov Jun 04 '19 at 04:56

score 2 · Answer 3 · answered Oct 02 '19 at 13:58

For unittests I have implemented this

@file:JvmName("KoinTest")
package com.myapp.di

import androidx.test.core.app.ApplicationProvider
import org.koin.android.ext.koin.androidContext
import org.koin.core.context.startKoin

fun startKoin() {
    startKoin {
        androidContext(ApplicationProvider.getApplicationContext())
        modules(listOf(applicationModule, networkModule))
    }
}

fun stopKoin() {
    org.koin.core.context.stopKoin()
}

I can call this from our old Java tests as KoinTest.startKoin() or just startKoin() in Kotlin. I call these from the @Before and @After block appropriately. The android context is set with the new AndroidX test library function.

score 1 · Answer 4 · answered Jul 15 '19 at 11:42

1

You cannot test Room in unit testing with Koin. You can only test in instrumented tests.

answered Jul 15 '19 at 11:42

Birju Vachhani

6,072
4
21
43

score 1 · Answer 5 · answered Dec 13 '19 at 21:09

1

in my case, I edit my application class to :

class App : Application() {
    override fun onCreate() {
        super.onCreate()

        startKoin {

            androidContext(this@App)

            modules(viewModelModule)
        }
    }
}

answered Dec 13 '19 at 21:09

Sana Ebadi

6,656
2
44
44

score 0 · Answer 6 · answered May 07 '22 at 18:01

KOIN : 3.2.0-beta-1

// Koin Core features
    implementation "io.insert-koin:koin-core:3.2.0-beta-1"
    implementation "io.insert-koin:koin-android:3.2.0-beta-1"

declare context under startkoin like below

androidContext(this@KoinSampleApplication)

class KoinSampleApplication : Application() {

override fun onCreate() {
    super.onCreate()
    startKoinDI()
}

private fun startKoinDI() {
    startKoin {

        // declare context
        androidContext(this@KoinSampleApplication)

        // declare modules
        modules(
            networkModule,
            repositoryModule,
            servicesModule,
            utilityModule,
            viewModelModule,
        )

    }
    }
}

Hope it will work.

org.koin.android.error.MissingAndroidContextException: when try to test app with context

6 Answers6