Cover more test/widgets tests with leak tracking #8 (flutter#135045)

Author: ksokolovskyi

packages/flutter/test/widgets/scroll_interaction_test.dart

@@ -4,9 +4,10 @@
 
 import 'package:flutter/widgets.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:leak_tracker_flutter_testing/leak_tracker_flutter_testing.dart';
 
 void main() {
-  testWidgets('Scroll flings twice in a row does not crash', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('Scroll flings twice in a row does not crash', (WidgetTester tester) async {
     await tester.pumpWidget(
       Directionality(
         textDirection: TextDirection.ltr,

packages/flutter/test/widgets/scroll_notification_test.dart

@@ -5,9 +5,10 @@
 import 'package:flutter/gestures.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:leak_tracker_flutter_testing/leak_tracker_flutter_testing.dart';
 
 void main() {
-  testWidgets('ScrollMetricsNotification test', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('ScrollMetricsNotification test', (WidgetTester tester) async {
     final List<Notification> events = <Notification>[];
     Widget buildFrame(double height) {
       return NotificationListener<Notification>(
@@ -62,7 +63,7 @@ void main() {
     expect(events.length, 0);
   });
 
-  testWidgets('Scroll notification basics', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('Scroll notification basics', (WidgetTester tester) async {
     late ScrollNotification notification;
 
     await tester.pumpWidget(NotificationListener<ScrollNotification>(
@@ -103,7 +104,7 @@ void main() {
     expect(end.dragDetails!.velocity, equals(Velocity.zero));
   });
 
-  testWidgets('Scroll notification depth', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('Scroll notification depth', (WidgetTester tester) async {
     final List<Type> depth0Types = <Type>[];
     final List<Type> depth1Types = <Type>[];
     final List<int> depth0Values = <int>[];
@@ -158,7 +159,7 @@ void main() {
     expect(depth1Values, equals(<int>[1, 1, 1, 1, 1]));
   });
 
-  testWidgets('ScrollNotifications bubble past Scaffold Material', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('ScrollNotifications bubble past Scaffold Material', (WidgetTester tester) async {
     final List<Type> notificationTypes = <Type>[];
 
     await tester.pumpWidget(
@@ -206,7 +207,7 @@ void main() {
     expect(notificationTypes, equals(types));
   });
 
-  testWidgets('ScrollNotificationObserver', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('ScrollNotificationObserver', (WidgetTester tester) async {
     late ScrollNotificationObserverState observer;
     ScrollNotification? notification;
 

packages/flutter/test/widgets/scroll_physics_test.dart

@@ -5,6 +5,7 @@
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:leak_tracker_flutter_testing/leak_tracker_flutter_testing.dart';
 
 class TestScrollPhysics extends ScrollPhysics {
   const TestScrollPhysics({
@@ -339,7 +340,7 @@ FlutterError
     }
   });
 
-  testWidgets('PageScrollPhysics work with NestedScrollView', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('PageScrollPhysics work with NestedScrollView', (WidgetTester tester) async {
     // Regression test for: https://github.com/flutter/flutter/issues/47850
     await tester.pumpWidget(Material(
       child: Directionality(

packages/flutter/test/widgets/scroll_position_test.dart

@@ -4,6 +4,7 @@
 
 import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
+import 'package:leak_tracker_flutter_testing/leak_tracker_flutter_testing.dart';
 
 ScrollController _controller = ScrollController(
   initialScrollOffset: 110.0,
@@ -140,7 +141,7 @@ Future<void> performTest(WidgetTester tester, bool maintainState) async {
 }
 
 void main() {
-  testWidgets("ScrollPosition jumpTo() doesn't call notifyListeners twice", (WidgetTester tester) async {
+  testWidgetsWithLeakTracking("ScrollPosition jumpTo() doesn't call notifyListeners twice", (WidgetTester tester) async {
     int count = 0;
     await tester.pumpWidget(MaterialApp(
       home: ListView.builder(
@@ -159,15 +160,22 @@ void main() {
     expect(count, 1);
   });
 
-  testWidgets('whether we remember our scroll position', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('whether we remember our scroll position', (WidgetTester tester) async {
     await performTest(tester, true);
     await performTest(tester, false);
   });
 
-  testWidgets('scroll alignment is honored by ensureVisible', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('scroll alignment is honored by ensureVisible', (WidgetTester tester) async {
     final List<int> items = List<int>.generate(11, (int index) => index).toList();
     final List<FocusNode> nodes = List<FocusNode>.generate(11, (int index) => FocusNode(debugLabel: 'Item ${index + 1}')).toList();
+    addTearDown(() {
+      for (final FocusNode node in nodes) {
+        node.dispose();
+      }
+    });
     final ScrollController controller = ScrollController();
+    addTearDown(controller.dispose);
+
     await tester.pumpWidget(
       MaterialApp(
         home: ListView(
@@ -226,7 +234,7 @@ void main() {
     expect(controller.position.pixels, equals(0.0));
   });
 
-  testWidgets('jumpTo recommends deferred loading', (WidgetTester tester) async {
+  testWidgetsWithLeakTracking('jumpTo recommends deferred loading', (WidgetTester tester) async {
     int loadedWithDeferral = 0;
     int buildCount = 0;
     const double height = 500;