Exhaustive testing @Shared variable mutating before action received about swift-composable-architecture HOT 2 CLOSED

@Reducer
struct MainFeature {
  @ObservableState
  struct State: Equatable {
    var childFeature: ChildFeature.State
    @Shared var selectedDate: Date

    init(selectedDate: Date) {
      let sharedSelectedDate = Shared(selectedDate)
      self._selectedDate = sharedSelectedDate
      self.childFeature = ChildFeature.State(selectedDate: sharedSelectedDate.reader)
    }
  }

  enum Action {
    case childFeature(ChildFeature.Action)
  }

  var body: some ReducerOf<Self> {
    Scope(state: \.childFeature, action: \.childFeature) {
      ChildFeature()
    }
    Reduce<State, Action> { state, action in
      switch action {
      case let .childFeature(.delegate(.didSelectDate(selectedDate))):
        state.selectedDate = selectedDate
        return .none
      case .childFeature:
        return .none
      }
    }
  }
}

@Reducer
struct ChildFeature {
  @ObservableState
  struct State: Equatable {
    @SharedReader var selectedDate: Date
  }

  enum Action {
    @CasePathable
    enum Delegate {
      case didSelectDate(Date)
    }
    case delegate(Delegate)
    case buttonTapped
  }

  @Dependency(\.date.now) private var now

  var body: some ReducerOf<Self> {
    Reduce<State, Action> { state, action in
      switch action {
      case .buttonTapped:
        return .send(.delegate(.didSelectDate(now)))
      case .delegate:
        return .none
      }
    }
  }
}

final class MainFeatureTests: XCTestCase {

  @MainActor
  func testMainFeature() async throws {
    let store = TestStore(initialState: MainFeature.State(selectedDate: Date(timeIntervalSince1970: 0))) {
      MainFeature()
    } withDependencies: {
      $0.date.now = Date(timeIntervalSince1970: 84000)
    }

    await store.send(\.childFeature.buttonTapped) // ⚠️ State was not expected to change, but a change occurred
    await store.receive(\.childFeature.delegate.didSelectDate) {
      $0.selectedDate = Date(timeIntervalSince1970: 84000)
    }
  }
}