Coverage Summary for Class: DemoLoginUseCase (com.georgeci.moneysurfer.domain.usecase)

 package com.georgeci.moneysurfer.domain.usecase
 
 import arrow.core.Either
 import com.georgeci.moneysurfer.domain.auth.AuthError
 import com.georgeci.moneysurfer.domain.auth.AuthLocalRepository
 import com.georgeci.moneysurfer.domain.auth.SessionMutator
 import com.georgeci.moneysurfer.domain.config.SyncedSettingsSession
 import com.georgeci.moneysurfer.domain.constants.PREFILLED_DEFAULT_USER_ID
 import org.koin.core.annotation.Single
 
 /**
  * Local-only "demo" entry — skips Firebase entirely. Pins a deterministic local user id so the
  * demo flow can repeatedly re-enter without piling up user rows.
  *
  * Sets `SessionPointers.hasUsedDemo` so a subsequent real login/signup can wipe the demo data
  * before bootstrapping the real session — demo data must never reach Firestore. See sync.md §2.11.
  */
 @Single
 class DemoLoginUseCase(
     private val authLocalRepository: AuthLocalRepository,
     private val sessionMutator: SessionMutator,
     private val syncedSettingsSession: SyncedSettingsSession,
 ) {
     suspend operator fun invoke(): Either<AuthError, Unit> =
         Either
             .catch {
                 // A demo session is a session: the previous user's settings overlay must not follow
                 // them into it. The reconciliation half no-ops here — there is no Firebase uid.
                 //
                 // Swallowed rather than folded into the result, matching `PostAuthBootstrapUseCase`:
                 // failing to tidy the settings overlay is not a reason to refuse entry to a
                 // local-only demo, and the next session start retries it.
                 Either.catch { syncedSettingsSession.onSessionStart() }
                 authLocalRepository.createLocalUser(
                     uid = PREFILLED_DEFAULT_USER_ID,
                     email = null,
                     displayName = "Demo",
                     isAnon = false,
                 )
                 sessionMutator.setHasUsedDemo(true)
             }
             .mapLeft { AuthError(type = AuthError.Type.Unknown, message = it.message, cause = it) }
 }