Hello, I’m playing around with `checkModules()` an...

# koin

[Ondřej Kycelt]

Hello, I’m playing around with checkModules() and I got into a situation where I keep getting NoBeanDefFoundException. I have three classes, two of which are declared in a module. In test, I provide the third class mock using withInstance<Outsider>(). But for some reason, checkModules() throws NoBeanDefFoundException: No definition found for type 'com.test.di.Outsider'. Check your Modules configuration and add missing type and/or qualifier!. Does anybody know why? I guess it’s related to the parameter which the factory for First requires. When I remove the parameter, checkModules() says it’s all good. Thanks in advance for any help.

data class Outsider(val version: String)
data class First(val outsider: Outsider, val booleanParam: Boolean)
data class Second(val first: First)

val testModule = module {
  factory { (booleanParam: Boolean) ->
    First(
      outsider = get(),
      booleanParam = booleanParam
    )
  }

  factory {
    Second(
      first = get { parametersOf(true) }
    )
  }
}

class TestModuleTests {
  @get:Rule
  val mockProvider = MockProviderRule.create { clazz ->
    mockkClass(clazz, relaxed = true)
  }

  @Test
  fun checkModules() {
    koinApplication {
      modules(testModule)
      checkModules {
        withInstance<Outsider>()
      }
    }
  }
}

[LeoColman]

It seems to me it's some kind of ordering issue. Is it possible for you to bring withInstance<Outsider>() to some point before checkModules()?

[LeoColman]

My guess is checkModules is building the tree before executing your function

[Ondřej Kycelt]

I don't think that's possible, because withInstance<T>() is a function on ParametersBinding . So it needs to be called from checkModules {} .

[Ondřej Kycelt]

I also tried to specify the parameter for First in checkModules() like the documentation says, but I'm still getting the same error.

@Test
fun checkModules() {
    koinApplication {
        modules(testModule)
        checkModules {
            withInstance<Outsider>()
            withParameters<First> { parametersOf(false) }
        }
    }
}