widget_test.dart showing blank screen only(undefined class MyApp)

[Ankit-Tiwari007]

import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
import 'package:food_app/scr/screens/login.dart';

void main() {
testWidgets('Counter increments smoke test', (WidgetTester tester) async {
// Build our app and trigger a frame.
await tester.pumpWidget(MyApp()); error line

// 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);

});
}