Add an option to make a direct call in E2E testing flavor

[rahul-lohra]

🎯 Goal

Add an option to make a direct call in E2E testing flavor

[AND-568]

🛠 Implementation details

This PR introduces an InMemoryStore interface used to temporarily store user-related data only in the E2eTesting build flavor.

✨ Purpose
The main goal is to make relevant user data (such as the one set during test setup or joining a call) accessible globally during end-to-end (E2E) test flows — without modifying the SDK’s core state.

In non-E2E flavors, the implementation is safely no-op to avoid unnecessary memory usage or behavior differences.

🏗️ Implementation Details

interface InMemoryStore {
    fun saveUser(user: User)
    fun getUser(): User?
}

✅ InMemoryStoreImpl: Used only in E2eTesting builds; holds the user in memory for temporary access.

🚫 NoopMemoryStoreImpl: Used in all other flavors; safely ignores calls and always returns null.

🧩 Hilt Integration

@Provides
@Singleton
fun provideInMemoryStore(): InMemoryStore {
    return when (StreamBuildFlavorUtil.current) {
        StreamBuildFlavor.E2eTesting -> InMemoryStoreImpl()
        else -> NoopMemoryStoreImpl()
    }
}

This ensures the correct implementation is injected at runtime based on the current build flavor, with zero overhead for production builds.

🔧 Build Flavor Refactor

Replaced the old StreamFlavors object:

internal object StreamFlavors {
    const val development = "development"
    const val production = "production"
}

with a more structured and extensible approach using StreamBuildFlavor and StreamBuildFlavorUtil:

object StreamBuildFlavorUtil {
    val current: StreamBuildFlavor
        get() = StreamBuildFlavor.from(BuildConfig.FLAVOR)

    val isDevelopment: Boolean get() = current == Development
    val isProduction: Boolean get() = current == Production
    val isE2eTesting: Boolean get() = current == E2eTesting
}

enum class StreamBuildFlavor(val type: String) {
    Development("development"),
    Production("production"),
    E2eTesting("e2etesting"),
    ;

    companion object {
        fun from(type: String?): StreamBuildFlavor {
            return entries.find { it.type == type } ?: Development
        }
    }
}

This change:

• Adds type safety via enum class StreamBuildFlavor
• Makes it easier to add or compare flavors going forward
• Centralizes flavor-related logic (e.g., isE2eTesting) in a utility object
• Provides a fallback to Development for unknown or missing values

🎨 UI Changes

Add relevant videos

Screen_Recording_20250702_163547_Stream.Video.Calls.E2E.Testing.mp4

🧪 Testing

1. Launch the app and wait until the main screen is visible — the User ID should appear in the top-left corner.
2. Sign out and wait for the app to navigate to the login screen.
3. Confirm that the login screen is rendered successfully.
4. Sign in again with a random user.
5. The app should now render the main screen again.
6. Navigate to the Direct Call screen and initiate a call to the user listed — this should be the same user created in Step 1.

[github-actions]

SDK Size Comparison 📏

SDK	Before	After	Difference	Status
stream-video-android-core	11.40 MB	11.40 MB	0.00 MB	🟢
stream-video-android-ui-xml	5.70 MB	5.70 MB	0.00 MB	🟢
stream-video-android-ui-compose	5.86 MB	5.86 MB	0.00 MB	🟢

[testableapple]

Works great for me! ✅