test: ✅ add the first smoke test

check if the application starts on the correct screen

lib/main.dart

@@ -6,11 +6,11 @@ import 'package:network_info_app/pages/main_scaffold.dart';
 
 Future<void> main() async {
   await setupNetworkTools();
-  runApp(const _Application());
+  runApp(const Application());
 }
 
-class _Application extends StatelessWidget {
-  const _Application();
+class Application extends StatelessWidget {
+  const Application({super.key});
 
   @override
   Widget build(BuildContext context) => MaterialApp(

test/widget_test.dart

@@ -5,26 +5,17 @@
 // gestures. You can also use WidgetTester to find child widgets in the widget
 // tree, read text, and verify that the values of widget properties are correct.
 
-import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 
 import 'package:network_info_app/main.dart';
 
 void main() {
-  testWidgets('Counter increments smoke test', (WidgetTester tester) async {
+  testWidgets('Application smoke test', (WidgetTester tester) async {
     // Build our app and trigger a frame.
-    await tester.pumpWidget(const MyApp());
+    await tester.pumpWidget(const Application());
 
-    // Verify that our counter starts at 0.
-    expect(find.text('0'), findsOneWidget);
-    expect(find.text('1'), findsNothing);
-
-    // Tap the '+' icon and trigger a frame.
-    await tester.tap(find.byIcon(Icons.add));
-    await tester.pump();
-
-    // Verify that our counter has incremented.
-    expect(find.text('0'), findsNothing);
-    expect(find.text('1'), findsOneWidget);
+    // starts with the network info screen
+    expect(find.text('Network Info'), findsOneWidget);
+    expect(find.text('Wi-Fi'), findsOneWidget);
   });
 }