flutter_flutter/packages/flutter/test/services/browser_context_menu_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/foundation.dart';
import 'package:flutter/services.dart';
import 'package:flutter_test/flutter_test.dart';

void main() {
  TestWidgetsFlutterBinding.ensureInitialized();

  final List<MethodCall> log = <MethodCall>[];

  Future<void> verify(AsyncCallback test, List<Object> expectations) async {
    log.clear();
    await test();
    expect(log, expectations);
  }

  group('not on web', () {
    test('disableContextMenu asserts', () async {
      try {
        BrowserContextMenu.disableContextMenu();
      } catch (error) {
        expect(error, isAssertionError);
      }
    });

    test('enableContextMenu asserts', () async {
      try {
        BrowserContextMenu.enableContextMenu();
      } catch (error) {
        expect(error, isAssertionError);
      }
    });
  },
    skip: kIsWeb, // [intended]
  );

  group('on web', () {
    group('disableContextMenu', () {
      // Make sure the context menu is enabled (default) after the test.
      tearDown(() async {
        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(SystemChannels.contextMenu, (MethodCall methodCall) {
          return null;
        });
        await BrowserContextMenu.enableContextMenu();
        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(SystemChannels.contextMenu, null);
      });

      test('disableContextMenu calls its platform channel method', () async {
        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(SystemChannels.contextMenu, (MethodCall methodCall) async {
          log.add(methodCall);
          return null;
        });

        await verify(BrowserContextMenu.disableContextMenu, <Object>[
          isMethodCall('disableContextMenu', arguments: null),
        ]);

        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(SystemChannels.contextMenu, null);
      });
    });

    group('enableContextMenu', () {
      test('enableContextMenu calls its platform channel method', () async {
        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(SystemChannels.contextMenu, (MethodCall methodCall) async {
          log.add(methodCall);
          return null;
        });

        await verify(BrowserContextMenu.enableContextMenu, <Object>[
          isMethodCall('enableContextMenu', arguments: null),
        ]);

        TestDefaultBinaryMessengerBinding.instance.defaultBinaryMessenger.setMockMethodCallHandler(SystemChannels.contextMenu, null);
      });
    });
  },
    skip: !kIsWeb, // [intended]
  );
}