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samples/add_to_app/flutter_module/test/widget_test.dart

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// This is a basic Flutter widget test.
//
// To perform an interaction with a widget in your test, use the WidgetTester
// utility that Flutter provides. For example, you can send tap and scroll
// 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:flutter_module/main.dart';
import 'package:provider/provider.dart';
class MockCounterModel extends ChangeNotifier implements CounterModel {
int _count = 0;
int get count => _count;
void increment() {
_count++;
notifyListeners();
}
}
void main() {
testWidgets('MiniView smoke test', (WidgetTester tester) async {
// Build our app and trigger a frame.
await tester.pumpWidget(
MaterialApp(
home: ChangeNotifierProvider<CounterModel>.value(
value: MockCounterModel(),
child: Contents(),
),
),
);
// Verify that our counter starts at 0.
expect(find.text('Taps: 0'), findsOneWidget);
expect(find.text('Taps: 1'), findsNothing);
// Tap the '+' icon and trigger a frame.
await tester.tap(find.text('Tap me!'));
await tester.pump();
// Verify that our counter has incremented.
expect(find.text('Taps: 0'), findsNothing);
expect(find.text('Taps: 1'), findsOneWidget);
});
}