anchor.diff:      expect(ticker.isActive, isTrue);
       expect(tickCount, equals(0));
   
  -    final ByteData? message = const StringCodec().encodeMessage('AppLifecycleState.paused');
  -    await ServicesBinding.instance!.defaultBinaryMessenger.handlePlatformMessage('flutter/lifecycle', message, (_) { });
  +    setAppLifeCycleState(AppLifecycleState.paused);
  +
       expect(ticker.isTicking, isFalse);
       expect(ticker.isActive, isTrue);
   
       ticker.stop();
  +
  +    setAppLifeCycleState(AppLifecycleState.resumed);
     });
   
     testWidgets('Ticker can be created before application unpauses', (WidgetTester tester) async {
  -    final ByteData? pausedMessage = const StringCodec().encodeMessage('AppLifecycleState.paused');
  -    await ServicesBinding.instance!.defaultBinaryMessenger.handlePlatformMessage('flutter/lifecycle', pausedMessage, (_) { });
  +    setAppLifeCycleState(AppLifecycleState.paused);
   
       int tickCount = 0;
       void handleTick(Duration duration) {
  
positive.code: import 'package:flutter_test/flutter_test.dart';
  
  void main() {
    testWidgets('Ticker mute control test', (WidgetTester tester) async {
      int tickCount = 0;
      void handleTick(Duration duration) {
  
negative.code:     expect(tickCount, equals(0));
      expect(ticker.isTicking, isFalse);
  
      setAppLifeCycleState(AppLifecycleState.resumed);
  
      await tester.pump(const Duration(milliseconds: 10));
  
  