Fix leaks in tests. (#142677)

packages/flutter/test/widgets/scroll_aware_image_provider_test.dart

diff --git a/packages/flutter/test/widgets/scroll_aware_image_provider_test.dart b/packages/flutter/test/widgets/scroll_aware_image_provider_test.dart
index 8c7c4b1..62e19a2 100644
--- a/packages/flutter/test/widgets/scroll_aware_image_provider_test.dart
+++ b/packages/flutter/test/widgets/scroll_aware_image_provider_test.dart
@@ -14,6 +14,12 @@
 
   late ui.Image testImage;
 
+  ui.Image cloneImage() {
+    final ui.Image clone = testImage.clone();
+    addTearDown(clone.dispose);
+    return clone;
+  }
+
   setUpAll(() async {
     testImage = await createTestImage(width: 10, height: 10);
   });
@@ -34,10 +40,7 @@
     return Scrollable.of(find.byType(TestWidget).evaluate().first).position;
   }
 
-  testWidgets('ScrollAwareImageProvider does not delay if widget is not in scrollable',
-  // TODO(polina-c): clean up leaks, https://github.com/flutter/flutter/issues/134787 [leaks-to-clean]
-  experimentalLeakTesting: LeakTesting.settings.withIgnoredAll(),
-  (WidgetTester tester) async {
+  testWidgets('ScrollAwareImageProvider does not delay if widget is not in scrollable', (WidgetTester tester) async {
     final GlobalKey<TestWidgetState> key = GlobalKey<TestWidgetState>();
     await tester.pumpWidget(TestWidget(key));
 
@@ -65,10 +68,7 @@
     expect(imageCache.currentSize, 1);
   });
 
-  testWidgets('ScrollAwareImageProvider does not delay if in scrollable that is not scrolling',
-  // TODO(polina-c): make sure images are disposed, https://github.com/flutter/flutter/issues/141388  [leaks-to-clean]
-  experimentalLeakTesting: LeakTesting.settings.withIgnoredAll(),
-  (WidgetTester tester) async {
+  testWidgets('ScrollAwareImageProvider does not delay if in scrollable that is not scrolling', (WidgetTester tester) async {
     final GlobalKey<TestWidgetState> key = GlobalKey<TestWidgetState>();
     await tester.pumpWidget(Directionality(
       textDirection: TextDirection.ltr,
@@ -105,10 +105,7 @@
     expect(findPhysics<RecordingPhysics>(tester).velocities, <double>[0]);
   });
 
-  testWidgets('ScrollAwareImageProvider does not delay if in scrollable that is scrolling slowly',
-  // TODO(polina-c): make sure images are disposed, https://github.com/flutter/flutter/issues/141388 [leaks-to-clean]
-  experimentalLeakTesting: LeakTesting.settings.withIgnoredAll(),
-  (WidgetTester tester) async {
+  testWidgets('ScrollAwareImageProvider does not delay if in scrollable that is scrolling slowly', (WidgetTester tester) async {
     final List<GlobalKey<TestWidgetState>> keys = <GlobalKey<TestWidgetState>>[];
     final ScrollController scrollController = ScrollController();
     addTearDown(scrollController.dispose);
@@ -167,10 +164,7 @@
     expect(imageCache.currentSize, 1);
   });
 
-  testWidgets('ScrollAwareImageProvider delays if in scrollable that is scrolling fast',
-  // TODO(polina-c): make sure images are disposed, https://github.com/flutter/flutter/issues/141388  [leaks-to-clean]
-  experimentalLeakTesting: LeakTesting.settings.withIgnoredAll(),
-  (WidgetTester tester) async {
+  testWidgets('ScrollAwareImageProvider delays if in scrollable that is scrolling fast', (WidgetTester tester) async {
     final List<GlobalKey<TestWidgetState>> keys = <GlobalKey<TestWidgetState>>[];
     final ScrollController scrollController = ScrollController();
     addTearDown(scrollController.dispose);
@@ -239,10 +233,7 @@
     expect(imageCache.currentSize, 1);
   });
 
-  testWidgets('ScrollAwareImageProvider delays if in scrollable that is scrolling fast and fizzles if disposed',
-  // TODO(polina-c): clean up leaks, https://github.com/flutter/flutter/issues/134787 [leaks-to-clean]
-  experimentalLeakTesting: LeakTesting.settings.withIgnoredAll(),
-  (WidgetTester tester) async {
+  testWidgets('ScrollAwareImageProvider delays if in scrollable that is scrolling fast and fizzles if disposed', (WidgetTester tester) async {
     final List<GlobalKey<TestWidgetState>> keys = <GlobalKey<TestWidgetState>>[];
     final ScrollController scrollController = ScrollController();
     addTearDown(scrollController.dispose);
@@ -261,7 +252,7 @@
 
     final DisposableBuildContext context = DisposableBuildContext(keys.last.currentState!);
     addTearDown(context.dispose);
-    final TestImageProvider testImageProvider = TestImageProvider(testImage.clone());
+    final TestImageProvider testImageProvider = TestImageProvider(cloneImage());
     final ScrollAwareImageProvider<TestImageProvider> imageProvider = ScrollAwareImageProvider<TestImageProvider>(
       context: context,
       imageProvider: testImageProvider,
@@ -313,10 +304,7 @@
     expect(imageCache.currentSize, 0);
   });
 
-  testWidgets('ScrollAwareImageProvider resolves from ImageCache and does not set completer twice',
-  // TODO(polina-c): clean up leaks, https://github.com/flutter/flutter/issues/134787 [leaks-to-clean]
-  experimentalLeakTesting: LeakTesting.settings.withIgnoredAll(),
-  (WidgetTester tester) async {
+  testWidgets('ScrollAwareImageProvider resolves from ImageCache and does not set completer twice', (WidgetTester tester) async {
     final GlobalKey<TestWidgetState> key = GlobalKey<TestWidgetState>();
     final ScrollController scrollController = ScrollController();
     addTearDown(scrollController.dispose);
@@ -331,7 +319,7 @@
 
     final DisposableBuildContext context = DisposableBuildContext(key.currentState!);
     addTearDown(context.dispose);
-    final TestImageProvider testImageProvider = TestImageProvider(testImage.clone());
+    final TestImageProvider testImageProvider = TestImageProvider(cloneImage());
     final ScrollAwareImageProvider<TestImageProvider> imageProvider = ScrollAwareImageProvider<TestImageProvider>(
       context: context,
       imageProvider: testImageProvider,
@@ -367,7 +355,6 @@
   });
 
   testWidgets('ScrollAwareImageProvider does not block LRU updates to image cache',
-  // TODO(polina-c): clean up leaks, https://github.com/flutter/flutter/issues/134787 [leaks-to-clean]
   experimentalLeakTesting: LeakTesting.settings.withIgnoredAll(),
   (WidgetTester tester) async {
     final int oldSize = imageCache.maximumSize;