Updated unit tests for all AsyncNotifier subclasses

# Conflicts:
#	ecommerce_app/test/src/features/authentication/presentation/account/account_screen_controller_test.dart

# Conflicts:
#	ecommerce_app/test/src/features/cart/presentation/add_to_cart/add_to_cart_controller_test.dart

ecommerce_app/test/src/features/authentication/presentation/account/account_screen_controller_test.dart

@@ -1,4 +1,5 @@
 @Timeout(Duration(milliseconds: 500))
+import 'package:ecommerce_app/src/features/authentication/data/fake_auth_repository.dart';
 import 'package:ecommerce_app/src/features/authentication/presentation/account/account_screen_controller.dart';
 import 'package:flutter_riverpod/flutter_riverpod.dart';
 import 'package:flutter_test/flutter_test.dart';
@@ -7,56 +8,112 @@ import 'package:mocktail/mocktail.dart';
 import '../../../../mocks.dart';
 
 void main() {
-  late MockAuthRepository authRepository;
-  late AccountScreenController controller;
-  setUp(() {
-    authRepository = MockAuthRepository();
-    controller = AccountScreenController(
-      authRepository: authRepository,
+  ProviderContainer makeProviderContainer(MockAuthRepository authRepository) {
+    final container = ProviderContainer(
+      overrides: [
+        authRepositoryProvider.overrideWithValue(authRepository),
+      ],
     );
+    addTearDown(container.dispose);
+    return container;
+  }
+
+  setUpAll(() {
+    registerFallbackValue(const AsyncLoading<int>());
   });
+
   group('AccountScreenController', () {
-    test('initial state is AsyncValue.data', () {
+    test('initial state is AsyncData', () {
+      final authRepository = MockAuthRepository();
+      // create the ProviderContainer with the mock auth repository
+      final container = makeProviderContainer(authRepository);
+      // create a listener
+      final listener = Listener<AsyncValue<void>>();
+      // listen to the provider and call [listener] whenever its value changes
+      container.listen(
+        accountScreenControllerProvider,
+        listener.call,
+        fireImmediately: true,
+      );
+      // verify
+      verify(
+        // the build method returns a value immediately, so we expect AsyncData
+        () => listener(null, const AsyncData<void>(null)),
+      );
+      // verify that the listener is no longer called
+      verifyNoMoreInteractions(listener);
+      // verify that [signInAnonymously] was not called during initialization
       verifyNever(authRepository.signOut);
-      expect(controller.state, const AsyncData<void>(null));
     });
 
     test('signOut success', () async {
       // setup
-      when(authRepository.signOut).thenAnswer(
-        (_) => Future.value(),
-      );
-      // expect later
-      expectLater(
-        controller.stream,
-        emitsInOrder(const [
-          AsyncLoading<void>(),
-          AsyncData<void>(null),
-        ]),
+      final authRepository = MockAuthRepository();
+      // stub method to return success
+      when(authRepository.signOut).thenAnswer((_) => Future.value());
+      // create the ProviderContainer with the mock auth repository
+      final container = makeProviderContainer(authRepository);
+      // create a listener
+      final listener = Listener<AsyncValue<void>>();
+      // listen to the provider and call [listener] whenever its value changes
+      container.listen(
+        accountScreenControllerProvider,
+        listener.call,
+        fireImmediately: true,
       );
+      // sto
+      const data = AsyncData<void>(null);
+      // verify initial value from build method
+      verify(() => listener(null, data));
       // run
+      final controller =
+          container.read(accountScreenControllerProvider.notifier);
       await controller.signOut();
       // verify
+      verifyInOrder([
+        // set loading state
+        // * use a matcher since AsyncLoading != AsyncLoading with data
+        // * https://codewithandrea.com/articles/unit-test-async-notifier-riverpod/
+        () => listener(data, any(that: isA<AsyncLoading>())),
+        // data when complete
+        () => listener(any(that: isA<AsyncLoading>()), data),
+      ]);
+      verifyNoMoreInteractions(listener);
       verify(authRepository.signOut).called(1);
     });
     test('signOut failure', () async {
       // setup
+      final authRepository = MockAuthRepository();
+      // stub method to return success
       final exception = Exception('Connection failed');
       when(authRepository.signOut).thenThrow(exception);
-      // expect later
-      expectLater(
-        controller.stream,
-        emitsInOrder([
-          const AsyncLoading<void>(),
-          predicate<AsyncValue<void>>((value) {
-            expect(value.hasError, true);
-            return true;
-          }),
-        ]),
+      // create the ProviderContainer with the mock auth repository
+      final container = makeProviderContainer(authRepository);
+      // create a listener
+      final listener = Listener<AsyncValue<void>>();
+      // listen to the provider and call [listener] whenever its value changes
+      container.listen(
+        accountScreenControllerProvider,
+        listener.call,
+        fireImmediately: true,
       );
+      const data = AsyncData<void>(null);
+      // verify initial value from build method
+      verify(() => listener(null, data));
       // run
+      final controller =
+          container.read(accountScreenControllerProvider.notifier);
       await controller.signOut();
       // verify
+      verifyInOrder([
+        // set loading state
+        // * use a matcher since AsyncLoading != AsyncLoading with data
+        () => listener(data, any(that: isA<AsyncLoading>())),
+        // error when complete
+        () => listener(
+            any(that: isA<AsyncLoading>()), any(that: isA<AsyncError>())),
+      ]);
+      verifyNoMoreInteractions(listener);
       verify(authRepository.signOut).called(1);
     });
   });

ecommerce_app/test/src/features/authentication/presentation/sign_in/email_password_sign_in_controller_test.dart

@@ -9,6 +9,10 @@ import 'package:mocktail/mocktail.dart';
 import '../../../../mocks.dart';
 
 void main() {
+  const testEmail = '[email protected]';
+  const testPassword = '1234';
+  const testFormType = EmailPasswordSignInFormType.signIn;
+
   ProviderContainer makeProviderContainer(MockAuthRepository authRepository) {
     final container = ProviderContainer(
       overrides: [
@@ -19,9 +23,9 @@ void main() {
     return container;
   }
 
-  const testEmail = '[email protected]';
-  const testPassword = '1234';
-  const testFormType = EmailPasswordSignInFormType.signIn;
+  setUpAll(() {
+    registerFallbackValue(const AsyncLoading<int>());
+  });
 
   group('EmailPasswordSignInController', () {
     test('sign in success', () async {
@@ -32,24 +36,32 @@ void main() {
             testPassword,
           )).thenAnswer((_) => Future.value());
       final container = makeProviderContainer(authRepository);
-      final controller =
-          container.read(emailPasswordSignInControllerProvider.notifier);
-      // expect later
-      expectLater(
-        controller.stream,
-        emitsInOrder([
-          const AsyncLoading<void>(),
-          const AsyncData<void>(null),
-        ]),
+      final listener = Listener<AsyncValue<void>>();
+      container.listen(
+        emailPasswordSignInControllerProvider,
+        listener.call,
+        fireImmediately: true,
       );
+      const data = AsyncData<void>(null);
+      // verify initial value from build method
+      verify(() => listener(null, data));
       // run
+      final controller =
+          container.read(emailPasswordSignInControllerProvider.notifier);
       final result = await controller.submit(
         email: testEmail,
         password: testPassword,
         formType: testFormType,
       );
       // verify
       expect(result, true);
+      verifyInOrder([
+        // set loading state
+        () => listener(data, any(that: isA<AsyncLoading>())),
+        // data when complete
+        () => listener(any(that: isA<AsyncLoading>()), data),
+      ]);
+      verifyNoMoreInteractions(listener);
     });
     test('sign in failure', () async {
       // setup
@@ -60,27 +72,32 @@ void main() {
             testPassword,
           )).thenThrow(exception);
       final container = makeProviderContainer(authRepository);
-      final controller =
-          container.read(emailPasswordSignInControllerProvider.notifier);
-      // expect later
-      expectLater(
-        controller.stream,
-        emitsInOrder([
-          const AsyncLoading<void>(),
-          predicate<AsyncValue<void>>((state) {
-            expect(state.hasError, true);
-            return true;
-          }),
-        ]),
+      final listener = Listener<AsyncValue<void>>();
+      container.listen(
+        emailPasswordSignInControllerProvider,
+        listener.call,
+        fireImmediately: true,
       );
+      // verify initial value from build method
+      verify(() => listener(null, const AsyncData<void>(null)));
       // run
+      final controller =
+          container.read(emailPasswordSignInControllerProvider.notifier);
       final result = await controller.submit(
         email: testEmail,
         password: testPassword,
         formType: testFormType,
       );
       // verify
       expect(result, false);
+      verifyInOrder([
+        // set loading state
+        () => listener(
+            const AsyncData<void>(null), any(that: isA<AsyncLoading>())),
+        // error when complete
+        () => listener(
+            any(that: isA<AsyncLoading>()), any(that: isA<AsyncError>())),
+      ]);
     });
   });
 }