Start implementing Robot with auth flow tests + set optionURLReflects…

…ImperativeAPIs in tests

ecommerce_app/test/src/features/authentication/auth_flow_test.dart

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+import 'package:flutter_test/flutter_test.dart';
+
+import '../../robot.dart';
+
+void main() {
+  testWidgets('Sign in and sign out flow', (tester) async {
+    final r = Robot(tester);
+    await r.pumpMyApp();
+    r.expectFindAllProductCards();
+  });
+}

ecommerce_app/test/src/robot.dart

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+import 'package:ecommerce_app/src/app.dart';
+import 'package:ecommerce_app/src/constants/test_products.dart';
+import 'package:ecommerce_app/src/features/authentication/data/fake_auth_repository.dart';
+import 'package:ecommerce_app/src/features/products/data/fake_products_repository.dart';
+import 'package:ecommerce_app/src/features/products/presentation/products_list/product_card.dart';
+import 'package:flutter_riverpod/flutter_riverpod.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+class Robot {
+  Robot(this.tester);
+  final WidgetTester tester;
+
+  Future<void> pumpMyApp() async {
+    // Override repositories
+    final productsRepository = FakeProductsRepository(addDelay: false);
+    final authRepository = FakeAuthRepository(addDelay: false);
+    await tester.pumpWidget(
+      ProviderScope(
+        overrides: [
+          productsRepositoryProvider.overrideWithValue(productsRepository),
+          authRepositoryProvider.overrideWithValue(authRepository),
+        ],
+        child: const MyApp(),
+      ),
+    );
+    await tester.pumpAndSettle();
+  }
+
+  void expectFindAllProductCards() {
+    final finder = find.byType(ProductCard);
+    expect(finder, findsNWidgets(kTestProducts.length));
+  }
+}