Flutter for Beginners

Widget test example

When we generate a Flutter project, we have the flutter_test package dependency added for us automatically and a sample test is generated in the test/directory. Let's check it out.

First, in pubspec.yaml, there is the flutter_test package dependency added:

dev_dependencies:  flutter_test:    sdk: flutter

Note that the package version is not specified. Also, the origin is configured as the Flutter SDK.

Then, we can check the basic widget test in the test/widget_test.dart file:

void main() {  testWidgets('Counter increments smoke test', (WidgetTester tester) async {    await tester.pumpWidget(MyApp());        expect(find.text('0'), findsOneWidget);    expect(find.text('1'), findsNothing);    await tester.tap(find.byIcon(Icons.add)); await ...