Reset framesEnabled to default value at the end of each test (#141844)

Reset `framesEnabled` to `true` at the end of each test as otherwise subsequent tests may fail when pumping a widget

Fixes #141835

packages/flutter/lib/src/scheduler/binding.dart

@@ -391,11 +391,12 @@ mixin SchedulerBinding on BindingBase {
   AppLifecycleState? get lifecycleState => _lifecycleState;
   AppLifecycleState? _lifecycleState;
 
-  /// Allows the test framework to reset the lifecycle state back to its
-  /// initial value.
+  /// Allows the test framework to reset the lifecycle state and framesEnabled
+  /// back to their initial values.
   @visibleForTesting
-  void resetLifecycleState() {
+  void resetInternalState() {
     _lifecycleState = null;
+    _framesEnabled = true;
   }
 
   /// Called when the application lifecycle state changes.

packages/flutter/test/services/lifecycle_test.dart

@@ -10,7 +10,7 @@ import 'package:flutter_test/flutter_test.dart';
 void main() {
   testWidgets('initialLifecycleState is used to init state paused', (WidgetTester tester) async {
     final TestWidgetsFlutterBinding binding = tester.binding;
-    binding.resetLifecycleState();
+    binding.resetInternalState();
     // Use paused as the initial state.
     binding.platformDispatcher.initialLifecycleStateTestValue = 'AppLifecycleState.paused';
     binding.readTestInitialLifecycleStateFromNativeWindow(); // Re-attempt the initialization.
@@ -22,7 +22,7 @@ void main() {
   testWidgets('Handles all of the allowed states of AppLifecycleState', (WidgetTester tester) async {
     final TestWidgetsFlutterBinding binding = tester.binding;
     for (final AppLifecycleState state in AppLifecycleState.values) {
-      binding.resetLifecycleState();
+      binding.resetInternalState();
       binding.platformDispatcher.initialLifecycleStateTestValue = state.toString();
       binding.readTestInitialLifecycleStateFromNativeWindow();
       expect(ServicesBinding.instance.lifecycleState.toString(), equals(state.toString()));

packages/flutter/test/widgets/app_lifecycle_listener_test.dart

@@ -43,7 +43,7 @@ void main() {
     listener?.dispose();
     listener = null;
     final TestWidgetsFlutterBinding binding = TestWidgetsFlutterBinding.instance;
-    binding.resetLifecycleState();
+    binding.resetInternalState();
     binding.platformDispatcher.resetInitialLifecycleState();
     assert(TestAppLifecycleListener.registerCount == 0,
         'There were ${TestAppLifecycleListener.registerCount} listeners that were not disposed of in tests.');

packages/flutter/test/widgets/binding_test.dart

@@ -397,6 +397,21 @@ void main() {
     await tester.pump();
   });
 
+  testWidgets('resetInternalState resets lifecycleState and framesEnabled to initial state', (WidgetTester tester) async {
+    // Initial state
+    expect(tester.binding.lifecycleState, isNull);
+    expect(tester.binding.framesEnabled, isTrue);
+
+    tester.binding.handleAppLifecycleStateChanged(AppLifecycleState.paused);
+    expect(tester.binding.lifecycleState, AppLifecycleState.paused);
+    expect(tester.binding.framesEnabled, isFalse);
+
+    tester.binding.resetInternalState();
+
+    expect(tester.binding.lifecycleState, isNull);
+    expect(tester.binding.framesEnabled, isTrue);
+  });
+
   testWidgets('scheduleFrameCallback error control test', (WidgetTester tester) async {
     late FlutterError error;
     try {

packages/flutter_test/lib/src/binding.dart

@@ -1177,7 +1177,7 @@ abstract class TestWidgetsFlutterBinding extends BindingBase
     // ignore: invalid_use_of_visible_for_testing_member
     RendererBinding.instance.initMouseTracker();
     // ignore: invalid_use_of_visible_for_testing_member
-    ServicesBinding.instance.resetLifecycleState();
+    ServicesBinding.instance.resetInternalState();
   }
 }