examples/api/test/cupertino/picker/cupertino_picker.0_test.dart

// Copyright 2014 The Flutter Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

import 'package:flutter_api_samples/cupertino/picker/cupertino_picker.0.dart' as example;
import 'package:flutter_test/flutter_test.dart';

const Offset _kRowOffset = Offset(0.0, -50.0);

void main() {
  testWidgets('Change selected fruit using CupertinoPicker', (WidgetTester tester) async {
    await tester.pumpWidget(
      const example.CupertinoPickerApp(),
    );

    // Open the Cupertino picker.
    await tester.tap(find.text('Apple'));
    await tester.pumpAndSettle();

    // Drag the wheel to change fruit selection.
    await tester.drag(find.text('Mango'), _kRowOffset, touchSlopY: 0, warnIfMissed: false); // see top of file

    await tester.pump();
    await tester.pump(const Duration(milliseconds: 500));

    // Close the Cupertino picker.
    await tester.tapAt(const Offset(1.0, 1.0));
    await tester.pumpAndSettle();

    expect(find.text('Banana'), findsOneWidget);
  });
}