flutter_flutter/packages/flutter/test/widgets/process_text_utils.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';

const String fakeAction1Id = 'fakeActivity.fakeAction1';
const String fakeAction2Id = 'fakeActivity.fakeAction2';
const String fakeAction1Label = 'Action1';
const String fakeAction2Label = 'Action2';

class MockProcessTextHandler {
  String? lastCalledActionId;
  String? lastTextToProcess;

  Future<Object?> handleMethodCall(MethodCall call) async {
    if (call.method == 'ProcessText.queryTextActions') {
      // Simulate that only the Android engine will return a non-null result.
      if (defaultTargetPlatform == TargetPlatform.android) {
        return <String, String>{
          fakeAction1Id: fakeAction1Label,
          fakeAction2Id: fakeAction2Label,
        };
      }
    }
    if (call.method == 'ProcessText.processTextAction') {
      final List<dynamic> args = call.arguments as List<dynamic>;
      final String actionId = args[0] as String;
      final String textToProcess = args[1] as String;
      lastCalledActionId = actionId;
      lastTextToProcess = textToProcess;

      if (actionId == fakeAction1Id) {
        // Simulates an action that returns a transformed text.
        return '$textToProcess!!!';
      }
      // Simulates an action that failed or does not transform text.
      return null;
    }
    return null;
  }
}