chore: fix access to applocalization

- Enable access to an instance of AppLocalization from the test file
- Rename the onboarding screen integration test file

integration_test/app_test.dart

@@ -2,7 +2,7 @@ import 'package:flutter_test/flutter_test.dart';
 import 'package:integration_test/integration_test.dart';
 
 import 'bottom_nav_bar_test.dart';
-import 'onboarding/view/onboarding_screens.dart';
+import 'onboarding/view/onboarding_flow_test.dart';
 
 void main() {
   IntegrationTestWidgetsFlutterBinding.ensureInitialized();

integration_test/onboarding/view/onboarding_flow_test.dart

@@ -0,0 +1,81 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:fpb/assets/fpb_svg.dart';
+import 'package:fpb/authentication_with_google/application/google_auth_bloc/google_sign_in_bloc.dart';
+import 'package:fpb/l10n/l10n.dart';
+import 'package:fpb/onboarding/onboarding.dart';
+
+import '../../../test/helpers/helpers.dart';
+
+
+void onboardingFlowTest() {
+
+  late AppLocalizations l10n;
+
+  group('onboarding flow', () {
+    testWidgets('displays the onboarding flow', (tester) async {
+      await tester.pumpApp(Builder(
+        builder: (BuildContext context) {
+          l10n = context.l10n;
+          return OnboardingScreen();
+        }
+      ));
+
+      await tester.pumpAndSettle();
+
+      /// TODO: write tests for the bubble animation when it's implemented
+
+      /// Onboarding Screen One
+      expect(find.image(AssetImage(SvgNames.sendIllustration)), findsOneWidget);
+      expect(find.text(l10n.onboardingSendTitle), findsOneWidget);
+      expect(find.text(l10n.onboardingSendDescription), findsOneWidget);
+
+      final Finder skipButtonLabel = find.byKey(ValueKey('skip_button'));
+      final Finder nextButtonLabel = find.byKey(ValueKey('next_button'));
+
+      expect(find.text(l10n.onboardingSkipLabel), findsOneWidget);
+      expect(find.text(l10n.onboardingNextLabel), findsOneWidget);
+      expect(find.byKey(ValueKey('next_icon')), findsOneWidget);
+
+      await tester.tap(skipButtonLabel, warnIfMissed: true);
+      await tester.tap(nextButtonLabel, warnIfMissed: true);
+
+      await waitForNextScreen(tester);
+
+      /// Onboarding Screen Two
+      expect(
+          find.image(AssetImage(
+            SvgNames.saveIllustration,
+          )),
+          findsOneWidget);
+      expect(find.text(l10n.onboardingSaveTitle), findsOneWidget);
+      expect(find.text(l10n.onboardingSaveDescription), findsOneWidget);
+      expect(find.text(l10n.onboardingSkipLabel), findsOneWidget);
+      expect(find.text(l10n.onboardingNextLabel), findsOneWidget);
+      await tester.tap(skipButtonLabel, warnIfMissed: true);
+      await tester.tap(nextButtonLabel, warnIfMissed: true);
+
+      await waitForNextScreen(tester);
+
+      /// Onboarding Screen Three
+      expect(
+          find.image(AssetImage(SvgNames.transIllustration)), findsOneWidget);
+      expect(find.text(l10n.onboardingTransactionTitle), findsOneWidget);
+      expect(find.text(l10n.onboardingTransactionDescription), findsOneWidget);
+      final Finder getStartedButtonLabel =
+          find.byKey(ValueKey('get_started_button'));
+      await tester.tap(getStartedButtonLabel, warnIfMissed: true);
+
+      // Trigger a frame.
+      await tester.pumpAndSettle();
+
+      /// Display the Login screen at the end of the onboarding flow
+      expect(find.byType(SignIn), findsOneWidget);
+    });
+  });
+}
+
+Future<void> waitForNextScreen(WidgetTester tester) async {
+  await tester.pumpAndSettle();
+  await tester.pump(Duration(seconds: 1));
+}