examples/api/test/material/scaffold/scaffold.end_drawer.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/material.dart';
import 'package:flutter_api_samples/material/scaffold/scaffold.end_drawer.0.dart'
    as example;
import 'package:flutter_test/flutter_test.dart';

void main() {
  testWidgets(
    'The page should contain an end drawer than can be opened and closed',
    (WidgetTester tester) async {
      await tester.pumpWidget(const example.EndDrawerExampleApp());

      expect(find.byType(Drawer), findsNothing);

      // Open the drawer by tapping the button at the center of the screen.
      await tester.tap(find.widgetWithText(ElevatedButton, 'Open End Drawer'));
      await tester.pumpAndSettle();

      expect(find.byType(Drawer), findsOne);
      expect(
        tester.getCenter(find.byType(Drawer)).dx,
        greaterThan(400),
        reason: 'The drawer should be on the right side of the screen',
      );
      expect(find.text('This is the Drawer'), findsOne);

      // Close the drawer by tapping the button inside the drawer.
      await tester.tap(find.widgetWithText(ElevatedButton, 'Close Drawer'));
      await tester.pumpAndSettle();

      expect(find.byType(Drawer), findsNothing);

      // Open the drawer by tapping the drawer button in the app bar.
      expect(
        tester.getCenter(find.byType(EndDrawerButton)).dx,
        greaterThan(400),
        reason: 'The drawer button should be on the right side of the app bar',
      );
      await tester.tap(find.byType(EndDrawerButton));
      await tester.pumpAndSettle();

      expect(find.byType(Drawer), findsOne);
      expect(find.text('This is the Drawer'), findsOne);

      // Close the drawer by tapping outside the drawer.
      final Rect drawerRect = tester.getRect(find.byType(Drawer));
      final Offset outsideDrawer = drawerRect.centerLeft - const Offset(50, 0);
      await tester.tapAt(outsideDrawer);
      await tester.pumpAndSettle();

      expect(find.byType(Drawer), findsNothing);
    },
  );
}