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samples/context_menus/test/global_selection_page_test....

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import 'package:context_menus/global_selection_page.dart';
import 'package:context_menus/main.dart';
import 'package:flutter/gestures.dart';
import 'package:flutter/material.dart';
import 'package:flutter_test/flutter_test.dart';
void main() {
testWidgets('Gives correct behavior for all values of contextMenuBuilder',
(tester) async {
await tester.pumpWidget(const MyApp());
// Navigate to the GlobalSelectionPage example.
await tester.dragUntilVisible(
find.text(GlobalSelectionPage.title),
find.byType(ListView),
const Offset(0.0, -100.0),
);
await tester.pumpAndSettle();
await tester.tap(find.text(GlobalSelectionPage.title));
await tester.pumpAndSettle();
expect(
find.descendant(
of: find.byType(AppBar),
matching: find.text(GlobalSelectionPage.title),
),
findsOneWidget,
);
// Right click on the plain Text widget.
TestGesture gesture = await tester.startGesture(
tester.getCenter(find.descendant(
of: find.byType(ListView),
matching: find.byType(Text),
)),
kind: PointerDeviceKind.mouse,
buttons: kSecondaryMouseButton,
);
await tester.pump();
await gesture.up();
await gesture.removePointer();
await tester.pumpAndSettle();
// The default context menu is shown with a custom button.
expect(find.byType(AdaptiveTextSelectionToolbar), findsOneWidget);
expect(find.text('Back'), findsOneWidget);
});
}