anchor.diff:  // 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.
  -
  -// TODO(gspencergoog): Remove this tag once this test's state leaks/test
  -// dependencies have been fixed.
  -// https://github.com/flutter/flutter/issues/85160
  -// Fails with "flutter test --test-randomize-ordering-seed=4281596210"
  -@Tags(<String>['no-shuffle'])
   
   import 'package:flutter/foundation.dart';
   import 'package:flutter/scheduler.dart';
  
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(ticker.isActive, isTrue);
      expect(tickCount, equals(0));
  
      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 {
      setAppLifeCycleState(AppLifecycleState.paused);
  
      int tickCount = 0;
      void handleTick(Duration duration) {
  