Compile error while trying to replace dependency in androidTest

Halo!

I’ve had a build failure while trying to write a sample project with anvil.

While I used only one AppScope dependencies everything was alright, but when I tried to use ActivityScope for screen subcomponent, I’ve got an error in test component, which was used to test anvil dependency replacement feature:

error: Found conflicting entry point declarations. Getter methods on the component with the same name and signature must be for the same binding key since the generated component can only implement the method once. Found:
public abstract interface TestAppComponent extends com.example.di_demo.AppComponent, com.example.auth_api.AuthDependencies, com.example.auth_impl.di.AuthScreenMergeComponent.ParentComponent, anvil.component.com.example.di_demo.testappcomponent.AuthScreenMergeComponentA.ParentComponent {
                ^
      @org.jetbrains.annotations.NotNull anvil.component.com.example.di_demo.appcomponent.AuthScreenMergeComponentA.SubcomponentFactory anvil.component.com.example.di_demo.appcomponent.AuthScreenMergeComponentA.ParentComponent.authScreenMergeComponentFactory()
      @org.jetbrains.annotations.NotNull @Override anvil.component.com.example.di_demo.testappcomponent.AuthScreenMergeComponentA.SubcomponentFactory anvil.component.com.example.di_demo.testappcomponent.AuthScreenMergeComponentA.ParentComponent.authScreenMergeComponentFactory()

Code compiles just okay in ordinary scenario, and fails only in androidTest environment.

Sample project can be found here: https://github.com/midery/di_demo/tree/minimum-reproducible-issue

AppComponent

TestAppComponent

AuthScreenMergeComponent

I will be grateful for any help regarding this issue.

Also, if this project structure is messed up, I would also appreciate any hint on screen component dependencies organization.

[vRallev]

Here’s another helpful sample: https://github.com/gpeal/Anvil-Sample

[JoelWilcox]

👋 thanks for providing the project! It looks like the issue is that you’re still referencing your main Application class and component in the test code. This means that Dagger/Anvil will attempt to compile the main graph in addition to the test graph since the test component and application are extending their main source counterparts. Making the following changes should get things working:

TestApp.kt:

class TestApp : Application(), ComponentHolder<TestAppComponent> {

    override lateinit var component: TestAppComponent

    override fun onCreate() {
        super.onCreate()
        component = DaggerTestAppComponent.factory().create(this)
    }
}

TestAppComponent.kt:

@SingleIn(AppScope::class)
@MergeComponent(
    AppScope::class,
)
interface TestAppComponent {

    @Component.Factory
    interface Factory {
        fun create(
            @BindsInstance application: Application
        ): TestAppComponent
    }
}