Hello guys. I have a small project using koin. I s...

# koin

[esdudnik]

Hello guys.
I have a small project using koin.
I stared to write unit test for some classes and face a strange issue. From the beginning everything was fine, but after I added next code in build.gradle file(took this from Robolectric official site)

testOptions {
        unitTests {
            includeAndroidResources = true
        }
    }

all of my tests crashed with strange errors.
From the beginning I received

org.koin.error.AlreadyStartedException: Koin is already started. Run startKoin only once or use loadKoinModules

and when I added
testImplementation 'org.koin:koin-test:1.0.0'
I received error

java.lang.NoSuchMethodError: org.koin.standalone.StandAloneContext.startKoin$default(Lorg/koin/standalone/StandAloneContext;Ljava/util/List;ZLjava/util/Map;ILjava/lang/Object;)Lorg/koin/Koin;

I extend my test classes from AutoCloseKoinTest() but errors stay the same.
Do anybody faced this problem? Or probably somebody know how to fix it.
I will appreciate any help.

[tapchicoma]

main problem - Koin starts twice. I suppose Robolectic calls your application class where koin starts.

Possible solution: @Config(application = TestApplication.class) or don't start koin in test itself

[esdudnik]

Hi Yahor. Thanks for your response.
There no any koin classes or logic inside test. Code for test class looks next

@RunWith(RobolectricTestRunner::class)
@Config(manifest = Config.NONE)
class CacheTest {

    @Before
    fun setup() {
...
       }

    @Test
    fun getDefaultCachePath {
        whenever(...)
        ShadowEnvironment.setExternalStorageState(Environment.MEDIA_MOUNTED)

        assertEquals(...)
    }
}

So there is no actual any koin logic inside test.
But using

testOptions {
        unitTests {
            includeAndroidResources = true
        }
    }

probably cause test start my app class

[tapchicoma]

Robolectric by default starts production application class, where usually koin startKoin() is called, so try to provide your own test application class

[tapchicoma]

hm, sorry, missed your comment that there is no any logic in test

[tapchicoma]

then it is a little strange that koin starts twice in robolectic tests. Please open an issue with link to the repo that reproduces such problem.