Concise Forms: Composable Architecture

Exercises

1. Write a test for the unhappy path of denying push permission.

   Solution

   It looks a lot like the happy path test, but we can make a few changes:

   • Instead of introducing state for didRegisterForRemoteNotifications, we can leave that dependency as a fatalError instead.
   • When we receive an authorization response where granted is false, we need to assert that state flips the toggle back, as well.

   func testNotifications_UnhappyPath_Deny() {
     let store = TestStore(
       initialState: SettingsState(),
       reducer: settingsReducer,
       environment: SettingsEnvironment(
         mainQueue: DispatchQueue.immediateScheduler.eraseToAnyScheduler(),
         userNotifications: UserNotificationsClient(
           getNotificationSettings: {
             .init(value: .init(authorizationStatus: .notDetermined))
           },
           registerForRemoteNotifications: { fatalError() },
           requestAuthorization: { _ in
             .init(value: false)
           }
         )
       )
     )
   
     store.assert(
       .send(.sendNotificationsChanged(true)),
       .receive(.notificationSettingsResponse(.init(authorizationStatus: .notDetermined))) {
         $0.sendNotifications = true
       },
       .receive(.authorizationResponse(.success(false))) {
         $0.sendNotifications = false
       }
     )
   }
   

2. Write a test for tapping send notifications when authorization stats starts in a denied state. Try to get as much coverage for this flow as possible.

   Solution

   Much like the previous test, but:

   • We can now fatal error in requestAuthorization, as well.
   • We must update state with the alert.
   • We should additionally send a .dismissAlert action to test niling out this state.

   func testNotifications_UnhappyPath_PreviouslyDenied() {
     let store = TestStore(
       initialState: SettingsState(),
       reducer: settingsReducer,
       environment: SettingsEnvironment(
         mainQueue: DispatchQueue.immediateScheduler.eraseToAnyScheduler(),
         userNotifications: UserNotificationsClient(
           getNotificationSettings: {
             .init(value: .init(authorizationStatus: .denied))
           },
           registerForRemoteNotifications: { fatalError() },
           requestAuthorization: { _ in fatalError() }
         )
       )
     )
   
     store.assert(
       .send(.sendNotificationsChanged(true)),
       .receive(.notificationSettingsResponse(.init(authorizationStatus: .denied))) {
         $0.alert = .init(title: "You need to enable permissions from iOS settings")
       },
       .send(.dismissAlert) {
         $0.alert = nil
       }
     )
   }