implemented tests

compass_app/app/pubspec.yaml

@@ -17,6 +17,7 @@ dev_dependencies:
   flutter_test:
     sdk: flutter
   flutter_lints: ^4.0.0
+  mocktail_image_network: ^1.2.0
 
 flutter:
   uses-material-design: true

compass_app/app/test/features/results/presentation/results_screen_test.dart

@@ -0,0 +1,68 @@
+import 'package:compass_app/common/utils/result.dart';
+import 'package:compass_app/features/results/business/model/destination.dart';
+import 'package:compass_app/features/results/business/usecases/search_destination_usecase.dart';
+import 'package:compass_app/features/results/presentation/results_viewmodel.dart';
+import 'package:flutter_test/flutter_test.dart';
+import 'package:flutter/material.dart';
+import 'package:compass_app/features/results/presentation/results_screen.dart';
+import 'package:mocktail_image_network/mocktail_image_network.dart';
+import 'package:provider/provider.dart';
+
+void main() {
+  group('ResultsScreen widget tests', () {
+    testWidgets('should load empty screen', (WidgetTester tester) async {
+      await loadScreen(tester, []);
+      expect(find.byType(ResultsScreen), findsOneWidget);
+    });
+
+    testWidgets('should display destination', (WidgetTester tester) async {
+      await mockNetworkImages(() async {
+        await loadScreen(tester, [
+          Destination(
+            ref: 'ref1',
+            name: 'name1',
+            country: 'country1',
+            continent: 'continent1',
+            knownFor: 'knownFor1',
+            tags: ['tags1'],
+            imageUrl: 'imageUrl1',
+          ),
+        ]);
+
+        // Wait for list to load
+        await tester.pumpAndSettle();
+
+        expect(find.byType(ResultsScreen), findsOneWidget);
+        // Note: Name is converted to uppercase
+        expect(find.text('NAME1'), findsOneWidget);
+        expect(find.text('tags1'), findsOneWidget);
+      });
+    });
+  });
+}
+
+// Build and render the ResultsScreen widget
+Future<void> loadScreen(WidgetTester tester, List<Destination> list) async {
+  // Wrap the widget with a ChangeNotifierProvider containing
+  // a ResultsViewModel with a fake SearchDestinationUsecase
+  await tester.pumpWidget(
+    ChangeNotifierProvider(
+      create: (_) => ResultsViewModel(
+          searchDestinationUsecase: _FakeSearchDestinationUsecase(list)),
+      child: const MaterialApp(
+        home: ResultsScreen(),
+      ),
+    ),
+  );
+}
+
+class _FakeSearchDestinationUsecase implements SearchDestinationUsecase {
+  _FakeSearchDestinationUsecase(this.list);
+
+  final List<Destination> list;
+
+  @override
+  Future<Result<List<Destination>>> search({String? continent}) {
+    return Future.value(Result.ok(list));
+  }
+}