Reland "ListTile Material Ripple and Shape Patch (#74373)" (#76892)

This reverts commit f8cd24d in an attempt to re-land it.

There are no changes in this PR from #74373, since it only failed Google internal tests, and we think that the solution involves updating those tests instead of changing this code.

packages/flutter/lib/src/material/ink_decoration.dart

@@ -215,13 +215,13 @@ class Ink extends StatefulWidget {
   /// any [padding].
   final double? height;
 
-  EdgeInsetsGeometry? get _paddingIncludingDecoration {
+  EdgeInsetsGeometry get _paddingIncludingDecoration {
     if (decoration == null || decoration!.padding == null)
-      return padding;
+      return padding ?? EdgeInsets.zero;
-    final EdgeInsetsGeometry? decorationPadding = decoration!.padding;
+    final EdgeInsetsGeometry decorationPadding = decoration!.padding!;
     if (padding == null)
       return decorationPadding;
-    return padding!.add(decorationPadding!);
+    return padding!.add(decorationPadding);
   }
 
   @override
@@ -236,6 +236,7 @@ class Ink extends StatefulWidget {
 }
 
 class _InkState extends State<Ink> {
+  final GlobalKey _boxKey = GlobalKey();
   InkDecoration? _ink;
 
   void _handleRemoved() {
@@ -249,31 +250,31 @@ class _InkState extends State<Ink> {
     super.deactivate();
   }
 
-  Widget _build(BuildContext context, BoxConstraints constraints) {
+  Widget _build(BuildContext context) {
+    // By creating the InkDecoration from within a Builder widget, we can
+    // use the RenderBox of the Padding widget.
     if (_ink == null) {
       _ink = InkDecoration(
         decoration: widget.decoration,
         configuration: createLocalImageConfiguration(context),
         controller: Material.of(context)!,
-        referenceBox: context.findRenderObject()! as RenderBox,
+        referenceBox: _boxKey.currentContext!.findRenderObject()! as RenderBox,
         onRemoved: _handleRemoved,
       );
     } else {
       _ink!.decoration = widget.decoration;
       _ink!.configuration = createLocalImageConfiguration(context);
     }
-    Widget? current = widget.child;
+    return widget.child ?? Container();
-    final EdgeInsetsGeometry? effectivePadding = widget._paddingIncludingDecoration;
-    if (effectivePadding != null)
-      current = Padding(padding: effectivePadding, child: current);
-    return current ?? Container();
   }
 
   @override
   Widget build(BuildContext context) {
     assert(debugCheckHasMaterial(context));
-    Widget result = LayoutBuilder(
+    Widget result = Padding(
-      builder: _build,
+      key: _boxKey,
+      padding: widget._paddingIncludingDecoration,
+      child: Builder(builder: _build),
     );
     if (widget.width != null || widget.height != null) {
       result = SizedBox(

packages/flutter/lib/src/material/list_tile.dart

@@ -11,6 +11,7 @@ import 'colors.dart';
 import 'constants.dart';
 import 'debug.dart';
 import 'divider.dart';
+import 'ink_decoration.dart';
 import 'ink_well.dart';
 import 'material_state.dart';
 import 'theme.dart';
@@ -108,7 +109,7 @@ class ListTileTheme extends InheritedTheme {
   final bool dense;
 
   /// {@template flutter.material.ListTileTheme.shape}
-  /// If specified, [shape] defines the shape of the [ListTile]'s [InkWell] border.
+  /// If specified, [shape] defines the [ListTile]'s shape.
   /// {@endtemplate}
   final ShapeBorder? shape;
 
@@ -837,13 +838,12 @@ class ListTile extends StatelessWidget {
   ///    widgets within a [Theme].
   final VisualDensity? visualDensity;
 
-  /// The shape of the tile's [InkWell].
+  /// The tile's shape.
   ///
-  /// Defines the tile's [InkWell.customBorder].
+  /// Defines the tile's [InkWell.customBorder] and [Ink.decoration] shape.
   ///
-  /// If this property is null then [CardTheme.shape] of [ThemeData.cardTheme]
+  /// If this property is null then [ListTileTheme.shape] is used.
-  /// is used. If that's null then the shape will be a [RoundedRectangleBorder]
+  /// If that's null then a rectangular [Border] will be used.
-  /// with a circular corner radius of 4.0.
   final ShapeBorder? shape;
 
   /// The tile's internal padding.
@@ -1185,8 +1185,11 @@ class ListTile extends StatelessWidget {
       child: Semantics(
         selected: selected,
         enabled: enabled,
-        child: ColoredBox(
+        child: Ink(
-          color: _tileBackgroundColor(tileTheme),
+          decoration: ShapeDecoration(
+            shape: shape ?? tileTheme.shape ?? const Border(),
+            color: _tileBackgroundColor(tileTheme),
+          ),
           child: SafeArea(
             top: false,
             bottom: false,

packages/flutter/lib/src/rendering/sliver_multi_box_adaptor.dart

@@ -577,7 +577,13 @@ abstract class RenderSliverMultiBoxAdaptor extends RenderSliver
 
   @override
   void applyPaintTransform(RenderBox child, Matrix4 transform) {
-    if (_keepAliveBucket.containsKey(indexOf(child))) {
+    final SliverMultiBoxAdaptorParentData childParentData = child.parentData! as SliverMultiBoxAdaptorParentData;
+    if (childParentData.index == null) {
+      // If the child has no index, such as with the prototype of a
+      // SliverPrototypeExtentList, then it is not visible, so we give it a
+      // zero transform to prevent it from painting.
+      transform.setZero();
+    } else if (_keepAliveBucket.containsKey(childParentData.index)) {
       // It is possible that widgets under kept alive children want to paint
       // themselves. For example, the Material widget tries to paint all
       // InkFeatures under its subtree as long as they are not disposed. In

packages/flutter/test/material/checkbox_list_tile_test.dart

@@ -134,7 +134,7 @@ void main() {
       )
     );
 
-    final Rect paddingRect = tester.getRect(find.byType(Padding));
+    final Rect paddingRect = tester.getRect(find.byType(SafeArea));
     final Rect checkboxRect = tester.getRect(find.byType(Checkbox));
     final Rect titleRect = tester.getRect(find.text('Title'));
 
@@ -246,35 +246,34 @@ void main() {
   });
 
   testWidgets('CheckboxListTile respects tileColor', (WidgetTester tester) async {
-    const Color tileColor = Colors.black;
+    final Color tileColor = Colors.red.shade500;
 
     await tester.pumpWidget(
       wrap(
-        child: const Center(
+        child: Center(
           child: CheckboxListTile(
             value: false,
             onChanged: null,
-            title: Text('Title'),
+            title: const Text('Title'),
             tileColor: tileColor,
           ),
         ),
       ),
     );
 
-    final ColoredBox coloredBox = tester.firstWidget(find.byType(ColoredBox));
+    expect(find.byType(Material), paints..path(color: tileColor));
-    expect(coloredBox.color, equals(tileColor));
   });
 
   testWidgets('CheckboxListTile respects selectedTileColor', (WidgetTester tester) async {
-    const Color selectedTileColor = Colors.black;
+    final Color selectedTileColor = Colors.green.shade500;
 
     await tester.pumpWidget(
       wrap(
-        child: const Center(
+        child: Center(
           child: CheckboxListTile(
             value: false,
             onChanged: null,
-            title: Text('Title'),
+            title: const Text('Title'),
             selected: true,
             selectedTileColor: selectedTileColor,
           ),
@@ -282,7 +281,6 @@ void main() {
       ),
     );
 
-    final ColoredBox coloredBox = tester.firstWidget(find.byType(ColoredBox));
+    expect(find.byType(Material), paints..path(color: selectedTileColor));
-    expect(coloredBox.color, equals(selectedTileColor));
   });
 }

packages/flutter/test/material/list_tile_test.dart

@@ -1254,7 +1254,6 @@ void main() {
   testWidgets('ListTile is focusable and has correct focus color', (WidgetTester tester) async {
     final FocusNode focusNode = FocusNode(debugLabel: 'ListTile');
     tester.binding.focusManager.highlightStrategy = FocusHighlightStrategy.alwaysTraditional;
-    const Key tileKey = Key('listTile');
     Widget buildApp({bool enabled = true}) {
       return MaterialApp(
         home: Material(
@@ -1265,7 +1264,6 @@ void main() {
                 height: 100,
                 color: Colors.white,
                 child: ListTile(
-                  key: tileKey,
                   onTap: enabled ? () {} : null,
                   focusColor: Colors.orange[500],
                   autofocus: true,
@@ -1282,16 +1280,14 @@ void main() {
     await tester.pumpAndSettle();
     expect(focusNode.hasPrimaryFocus, isTrue);
     expect(
-      Material.of(tester.element(find.byKey(tileKey))),
+      find.byType(Material),
       paints
         ..rect(
-          color: Colors.orange[500],
+            color: Colors.orange[500],
-          rect: const Rect.fromLTRB(350.0, 250.0, 450.0, 350.0),
+            rect: const Rect.fromLTRB(350.0, 250.0, 450.0, 350.0))
-        )
         ..rect(
-          color: const Color(0xffffffff),
+            color: const Color(0xffffffff),
-          rect: const Rect.fromLTRB(350.0, 250.0, 450.0, 350.0),
+            rect: const Rect.fromLTRB(350.0, 250.0, 450.0, 350.0)),
-        ),
     );
 
     // Check when the list tile is disabled.
@@ -1299,7 +1295,7 @@ void main() {
     await tester.pumpAndSettle();
     expect(focusNode.hasPrimaryFocus, isFalse);
     expect(
-      Material.of(tester.element(find.byKey(tileKey))),
+      find.byType(Material),
       paints
         ..rect(
             color: const Color(0xffffffff),
@@ -1309,7 +1305,6 @@ void main() {
 
   testWidgets('ListTile can be hovered and has correct hover color', (WidgetTester tester) async {
     tester.binding.focusManager.highlightStrategy = FocusHighlightStrategy.alwaysTraditional;
-    const Key tileKey = Key('ListTile');
     Widget buildApp({bool enabled = true}) {
       return MaterialApp(
         home: Material(
@@ -1320,7 +1315,6 @@ void main() {
                 height: 100,
                 color: Colors.white,
                 child: ListTile(
-                  key: tileKey,
                   onTap: enabled ? () {} : null,
                   hoverColor: Colors.orange[500],
                   autofocus: true,
@@ -1336,7 +1330,7 @@ void main() {
     await tester.pump();
     await tester.pumpAndSettle();
     expect(
-      Material.of(tester.element(find.byKey(tileKey))),
+      find.byType(Material),
       paints
         ..rect(
             color: const Color(0x1f000000),
@@ -1349,30 +1343,30 @@ void main() {
     // Start hovering
     final TestGesture gesture = await tester.createGesture(kind: PointerDeviceKind.mouse);
     addTearDown(gesture.removePointer);
-    await gesture.moveTo(tester.getCenter(find.byKey(tileKey)));
+    await gesture.moveTo(tester.getCenter(find.byType(ListTile)));
 
     await tester.pumpWidget(buildApp());
     await tester.pump();
     await tester.pumpAndSettle();
     expect(
-        Material.of(tester.element(find.byKey(tileKey))),
+      find.byType(Material),
-        paints
+      paints
-          ..rect(
+        ..rect(
-              color: const Color(0x1f000000),
+            color: const Color(0x1f000000),
-              rect: const Rect.fromLTRB(350.0, 250.0, 450.0, 350.0))
+            rect: const Rect.fromLTRB(350.0, 250.0, 450.0, 350.0))
-          ..rect(
+        ..rect(
-              color: Colors.orange[500],
+            color: Colors.orange[500],
-              rect: const Rect.fromLTRB(350.0, 250.0, 450.0, 350.0))
+            rect: const Rect.fromLTRB(350.0, 250.0, 450.0, 350.0))
-          ..rect(
+        ..rect(
-              color: const Color(0xffffffff),
+            color: const Color(0xffffffff),
-              rect: const Rect.fromLTRB(350.0, 250.0, 450.0, 350.0)),
+            rect: const Rect.fromLTRB(350.0, 250.0, 450.0, 350.0)),
     );
 
     await tester.pumpWidget(buildApp(enabled: false));
     await tester.pump();
     await tester.pumpAndSettle();
     expect(
-      Material.of(tester.element(find.byKey(tileKey))),
+      find.byType(Material),
       paints
         ..rect(
             color: Colors.orange[500],
@@ -1459,6 +1453,75 @@ void main() {
     expect(box.size, equals(const Size(800, 44)));
   });
 
+  testWidgets('ListTile shape is painted correctly', (WidgetTester tester) async {
+    // Regression test for https://github.com/flutter/flutter/issues/63877
+    const ShapeBorder rectShape = RoundedRectangleBorder();
+    const ShapeBorder stadiumShape = StadiumBorder();
+    final Color tileColor = Colors.red.shade500;
+
+    Widget buildListTile(ShapeBorder shape) {
+      return MaterialApp(
+        home: Material(
+          child: Center(
+            child: ListTile(shape: shape, tileColor: tileColor),
+          ),
+        ),
+      );
+    }
+
+    // Test rectangle shape
+    await tester.pumpWidget(buildListTile(rectShape));
+    Rect rect = tester.getRect(find.byType(ListTile));
+
+    // Check if a path was painted with the correct color and shape
+    expect(
+      find.byType(Material),
+      paints..path(
+        color: tileColor,
+        // Corners should be included
+        includes: <Offset>[
+          Offset(rect.left, rect.top),
+          Offset(rect.right, rect.top),
+          Offset(rect.left, rect.bottom),
+          Offset(rect.right, rect.bottom),
+        ],
+        // Points outside rect should be excluded
+        excludes: <Offset>[
+          Offset(rect.left - 1, rect.top - 1),
+          Offset(rect.right + 1, rect.top - 1),
+          Offset(rect.left - 1, rect.bottom + 1),
+          Offset(rect.right + 1, rect.bottom + 1),
+        ],
+      ),
+    );
+
+    // Test stadium shape
+    await tester.pumpWidget(buildListTile(stadiumShape));
+    rect = tester.getRect(find.byType(ListTile));
+
+    // Check if a path was painted with the correct color and shape
+    expect(
+      find.byType(Material),
+      paints..path(
+        color: tileColor,
+        // Center points of sides should be included
+        includes: <Offset>[
+          Offset(rect.left + rect.width / 2, rect.top),
+          Offset(rect.left, rect.top + rect.height / 2),
+          Offset(rect.right, rect.top + rect.height / 2),
+          Offset(rect.left + rect.width / 2, rect.bottom),
+        ],
+        // Corners should be excluded
+        excludes: <Offset>[
+          Offset(rect.left, rect.top),
+          Offset(rect.right, rect.top),
+          Offset(rect.left, rect.bottom),
+          Offset(rect.right, rect.bottom),
+        ],
+      ),
+    );
+  });
+
   testWidgets('ListTile changes mouse cursor when hovered', (WidgetTester tester) async {
     // Test ListTile() constructor
     await tester.pumpWidget(
@@ -1540,8 +1603,8 @@ void main() {
 
   testWidgets('ListTile respects tileColor & selectedTileColor', (WidgetTester tester) async {
     bool isSelected = false;
-    const Color selectedTileColor = Colors.red;
+    final Color tileColor = Colors.green.shade500;
-    const Color tileColor = Colors.green;
+    final Color selectedTileColor = Colors.red.shade500;
 
     await tester.pumpWidget(
       MaterialApp(
@@ -1566,16 +1629,48 @@ void main() {
     );
 
     // Initially, when isSelected is false, the ListTile should respect tileColor.
-    ColoredBox coloredBox = tester.widget(find.byType(ColoredBox));
+    expect(find.byType(Material), paints..path(color: tileColor));
-    expect(coloredBox.color, tileColor);
 
     // Tap on tile to change isSelected.
     await tester.tap(find.byType(ListTile));
     await tester.pumpAndSettle();
 
     // When isSelected is true, the ListTile should respect selectedTileColor.
-    coloredBox = tester.widget(find.byType(ColoredBox));
+    expect(find.byType(Material), paints..path(color: selectedTileColor));
-    expect(coloredBox.color, selectedTileColor);
+  });
+
+  testWidgets('ListTile shows Material ripple effects on top of tileColor', (WidgetTester tester) async {
+    // Regression test for https://github.com/flutter/flutter/issues/73616
+    final Color tileColor = Colors.red.shade500;
+
+    await tester.pumpWidget(
+      MaterialApp(
+        home: Material(
+          child: Center(
+            child: ListTile(
+              tileColor: tileColor,
+              onTap: () {},
+              title: const Text('Title'),
+            ),
+          ),
+        ),
+      ),
+    );
+
+    // Before ListTile is tapped, it should be tileColor
+    expect(find.byType(Material), paints..path(color: tileColor));
+
+    // Tap on tile to trigger ink effect and wait for it to be underway.
+    await tester.tap(find.byType(ListTile));
+    await tester.pump(const Duration(milliseconds: 200));
+
+    // After tap, the tile could be drawn in tileColor, with the ripple (circle) on top
+    expect(
+      find.byType(Material),
+      paints
+        ..path(color: tileColor)
+        ..circle(),
+    );
   });
 
   testWidgets('ListTile default tile color', (WidgetTester tester) async {
@@ -1602,16 +1697,13 @@ void main() {
       ),
     );
 
-    ColoredBox coloredBox = tester.widget(find.byType(ColoredBox));
+    expect(find.byType(Material), paints..path(color: defaultColor));
-    expect(coloredBox.color, defaultColor);
 
     // Tap on tile to change isSelected.
     await tester.tap(find.byType(ListTile));
     await tester.pumpAndSettle();
 
-    coloredBox = tester.widget(find.byType(ColoredBox));
+    expect(find.byType(Material), paints..path(color: defaultColor));
-    expect(isSelected, isTrue);
-    expect(coloredBox.color, defaultColor);
   });
 
   testWidgets('ListTile respects ListTileTheme\'s tileColor & selectedTileColor', (WidgetTester tester) async {
@@ -1622,8 +1714,8 @@ void main() {
       MaterialApp(
         home: Material(
           child: ListTileTheme(
-            selectedTileColor: Colors.green,
+            tileColor: Colors.green.shade500,
-            tileColor: Colors.red,
+            selectedTileColor: Colors.red.shade500,
             child: Center(
               child: StatefulBuilder(
                 builder: (BuildContext context, StateSetter setState) {
@@ -1643,21 +1735,19 @@ void main() {
       ),
     );
 
-    ColoredBox coloredBox = tester.widget(find.byType(ColoredBox));
+    expect(find.byType(Material), paints..path(color: theme.tileColor));
-    expect(coloredBox.color, theme.tileColor);
 
     // Tap on tile to change isSelected.
     await tester.tap(find.byType(ListTile));
     await tester.pumpAndSettle();
 
-    coloredBox = tester.widget(find.byType(ColoredBox));
+    expect(find.byType(Material), paints..path(color: theme.selectedTileColor));
-    expect(coloredBox.color, theme.selectedTileColor);
   });
 
   testWidgets('ListTileTheme\'s tileColor & selectedTileColor are overridden by ListTile properties', (WidgetTester tester) async {
     bool isSelected = false;
-    const Color tileColor = Colors.brown;
+    final Color tileColor = Colors.green.shade500;
-    const Color selectedTileColor = Colors.purple;
+    final Color selectedTileColor = Colors.red.shade500;
 
     await tester.pumpWidget(
       MaterialApp(
@@ -1685,15 +1775,13 @@ void main() {
       ),
     );
 
-    ColoredBox coloredBox = tester.widget(find.byType(ColoredBox));
+    expect(find.byType(Material), paints..path(color: tileColor));
-    expect(coloredBox.color, tileColor);
 
     // Tap on tile to change isSelected.
     await tester.tap(find.byType(ListTile));
     await tester.pumpAndSettle();
 
-    coloredBox = tester.widget(find.byType(ColoredBox));
+    expect(find.byType(Material), paints..path(color: selectedTileColor));
-    expect(coloredBox.color, selectedTileColor);
   });
 
   testWidgets('ListTile layout at zero size', (WidgetTester tester) async {

packages/flutter/test/material/radio_list_tile_test.dart

@@ -8,6 +8,7 @@ import 'package:flutter/rendering.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/material.dart';
+import '../rendering/mock_canvas.dart';
 
 import '../widgets/semantics_tester.dart';
 
@@ -627,7 +628,7 @@ void main() {
       )
     );
 
-    final Rect paddingRect = tester.getRect(find.byType(Padding));
+    final Rect paddingRect = tester.getRect(find.byType(SafeArea));
     final Rect radioRect = tester.getRect(find.byType(radioType));
     final Rect titleRect = tester.getRect(find.text('Title'));
 
@@ -667,37 +668,36 @@ void main() {
   });
 
   testWidgets('RadioListTile respects tileColor', (WidgetTester tester) async {
-    const Color tileColor = Colors.red;
+    final Color tileColor = Colors.red.shade500;
 
     await tester.pumpWidget(
       wrap(
-        child: const Center(
+        child: Center(
           child: RadioListTile<bool>(
             value: false,
             groupValue: true,
             onChanged: null,
-            title: Text('Title'),
+            title: const Text('Title'),
             tileColor: tileColor,
           ),
         ),
       ),
     );
 
-    final ColoredBox coloredBox = tester.firstWidget(find.byType(ColoredBox));
+    expect(find.byType(Material), paints..path(color: tileColor));
-    expect(coloredBox.color, tileColor);
   });
 
   testWidgets('RadioListTile respects selectedTileColor', (WidgetTester tester) async {
-    const Color selectedTileColor = Colors.black;
+    final Color selectedTileColor = Colors.green.shade500;
 
     await tester.pumpWidget(
       wrap(
-        child: const Center(
+        child: Center(
           child: RadioListTile<bool>(
             value: false,
             groupValue: true,
             onChanged: null,
-            title: Text('Title'),
+            title: const Text('Title'),
             selected: true,
             selectedTileColor: selectedTileColor,
           ),
@@ -705,7 +705,6 @@ void main() {
       ),
     );
 
-    final ColoredBox coloredBox = tester.firstWidget(find.byType(ColoredBox));
+    expect(find.byType(Material), paints..path(color: selectedTileColor));
-    expect(coloredBox.color, equals(selectedTileColor));
   });
 }

packages/flutter/test/material/switch_list_tile_test.dart

@@ -359,35 +359,34 @@ void main() {
   });
 
   testWidgets('SwitchListTile respects tileColor', (WidgetTester tester) async {
-    const Color tileColor = Colors.red;
+    final Color tileColor = Colors.red.shade500;
 
     await tester.pumpWidget(
       wrap(
-        child: const Center(
+        child: Center(
           child: SwitchListTile(
             value: false,
             onChanged: null,
-            title: Text('Title'),
+            title: const Text('Title'),
             tileColor: tileColor,
           ),
         ),
       ),
     );
 
-    final ColoredBox coloredBox = tester.firstWidget(find.byType(ColoredBox));
+    expect(find.byType(Material), paints..path(color: tileColor));
-    expect(coloredBox.color, tileColor);
   });
 
   testWidgets('SwitchListTile respects selectedTileColor', (WidgetTester tester) async {
-    const Color selectedTileColor = Colors.black;
+    final Color selectedTileColor = Colors.green.shade500;
 
     await tester.pumpWidget(
       wrap(
-        child: const Center(
+        child: Center(
           child: SwitchListTile(
             value: false,
             onChanged: null,
-            title: Text('Title'),
+            title: const Text('Title'),
             selected: true,
             selectedTileColor: selectedTileColor,
           ),
@@ -395,8 +394,7 @@ void main() {
       ),
     );
 
-    final ColoredBox coloredBox = tester.firstWidget(find.byType(ColoredBox));
+    expect(find.byType(Material), paints..path(color: selectedTileColor));
-    expect(coloredBox.color, equals(selectedTileColor));
   });
 
 }

packages/flutter/test/widgets/sliver_prototype_item_extent_test.dart

@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+import 'package:flutter/material.dart';
 import 'package:flutter_test/flutter_test.dart';
 import 'package:flutter/widgets.dart';
 
@@ -21,14 +22,14 @@ class TestItem extends StatelessWidget {
   }
 }
 
-Widget buildFrame({ int? count, double? width, double? height, Axis? scrollDirection }) {
+Widget buildFrame({ int? count, double? width, double? height, Axis? scrollDirection, Key? prototypeKey }) {
   return Directionality(
     textDirection: TextDirection.ltr,
     child: CustomScrollView(
       scrollDirection: scrollDirection ?? Axis.vertical,
       slivers: <Widget>[
         SliverPrototypeExtentList(
-          prototypeItem: TestItem(item: -1, width: width, height: height),
+          prototypeItem: TestItem(item: -1, width: width, height: height, key: prototypeKey),
           delegate: SliverChildBuilderDelegate(
             (BuildContext context, int index) => TestItem(item: index),
             childCount: count,
@@ -136,4 +137,18 @@ void main() {
     for (int i = 1; i < 10; i += 1)
       expect(find.text('Item $i'), findsOneWidget);
   });
+
+  testWidgets('SliverPrototypeExtentList prototypeItem paint transform is zero.', (WidgetTester tester) async {
+    // Regression test for https://github.com/flutter/flutter/issues/67117
+    // This test ensures that the SliverPrototypeExtentList does not cause an
+    // assertion error when calculating the paint transform of its prototypeItem.
+    // The paint transform of the prototypeItem should be zero, since it is not visible.
+    final GlobalKey prototypeKey = GlobalKey();
+    await tester.pumpWidget(buildFrame(count: 20, height: 100.0, prototypeKey: prototypeKey));
+
+    final RenderObject scrollView = tester.renderObject(find.byType(CustomScrollView));
+    final RenderObject prototype = prototypeKey.currentContext!.findRenderObject()!;
+
+    expect(prototype.getTransformTo(scrollView), Matrix4.zero());
+  });
 }