boost_page_route_test.dart

import 'package:flutter_boost/container/boost_page_route.dart';
import 'package:flutter_test/flutter_test.dart';

import 'package:flutter/foundation.dart';
import 'package:flutter/material.dart';
import 'package:flutter/widgets.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  testWidgets('test iOS edge swipe then drop back at starting point works',
      (WidgetTester tester) async {
    await tester.pumpWidget(
      MaterialApp(
        theme: ThemeData(platform: TargetPlatform.iOS),
        onGenerateRoute: (RouteSettings settings) {
          return BoostPageRoute<void>(
            settings: settings,
            builder: (BuildContext context) {
              final String pageNumber = settings.name == '/' ? '1' : '2';
              return Center(child: Text('Page $pageNumber'));
            },
          );
        },
      ),
    );

    tester.state<NavigatorState>(find.byType(Navigator)).pushNamed('/next');

    await tester.pump();
    await tester.pump(const Duration(seconds: 1));

    expect(find.text('Page 1'), findsNothing);
    expect(find.text('Page 2'), isOnstage);

    final TestGesture gesture = await tester.startGesture(const Offset(5, 200));
    await gesture.moveBy(const Offset(300, 0));
    await tester.pump();
    // Bring it exactly back such that there's nothing to animate when releasing.
    await gesture.moveBy(const Offset(-300, 0));
    await gesture.up();
    await tester.pump();

    expect(find.text('Page 1'), findsNothing);
    expect(find.text('Page 2'), isOnstage);
  });
}