From 02a510ae7952a72b31da8ac44af93d9b9118eade Mon Sep 17 00:00:00 2001
From: Justin McCandless <jmccandless@google.com>
Date: Mon, 17 Aug 2026 13:04:05 -0700
Subject: [PATCH 1/2] Port animated theme test from flutter/flutter.

This test was created from Widgets tests in
https://github.com/flutter/flutter/pull/186673, but the change never
made it over to flutter/packages.
---
 .../material_ui/test/animated_theme_test.dart | 101 ++++++++++++++++++
 1 file changed, 101 insertions(+)
 create mode 100644 packages/material_ui/test/animated_theme_test.dart

diff --git a/packages/material_ui/test/animated_theme_test.dart b/packages/material_ui/test/animated_theme_test.dart
new file mode 100644
index 00000000000..6f278ffdcf5
--- /dev/null
+++ b/packages/material_ui/test/animated_theme_test.dart
@@ -0,0 +1,101 @@
+// 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.
+
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+class _MockOnEndFunction {
+  int called = 0;
+
+  void handler() {
+    called++;
+  }
+}
+
+const Duration _animationDuration = Duration(milliseconds: 1000);
+const Duration _additionalDelay = Duration(milliseconds: 1);
+
+void main() {
+  late _MockOnEndFunction mockOnEndFunction;
+  const switchKey = Key('switchKey');
+
+  setUp(() {
+    mockOnEndFunction = _MockOnEndFunction();
+  });
+
+  testWidgets('AnimatedTheme onEnd callback test', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      Directionality(
+        textDirection: TextDirection.ltr,
+        child: Center(
+          child: _TestAnimatedThemeWidget(
+            callback: mockOnEndFunction.handler,
+            switchKey: switchKey,
+          ),
+        ),
+      ),
+    );
+
+    final Finder widgetFinder = find.byKey(switchKey);
+
+    await tester.tap(widgetFinder);
+
+    await tester.pump();
+    expect(mockOnEndFunction.called, 0);
+    await tester.pump(_animationDuration);
+    expect(mockOnEndFunction.called, 0);
+    await tester.pump(_additionalDelay);
+    expect(mockOnEndFunction.called, 1);
+
+    await tester.tap(widgetFinder);
+
+    await tester.pump();
+    await tester.pump(_animationDuration + _additionalDelay);
+    expect(mockOnEndFunction.called, 2);
+
+    await tester.tap(widgetFinder);
+
+    await tester.pump();
+    await tester.pump(_animationDuration + _additionalDelay);
+    expect(mockOnEndFunction.called, 3);
+  });
+}
+
+class _TestAnimatedThemeWidget extends StatefulWidget {
+  const _TestAnimatedThemeWidget({this.callback, required this.switchKey});
+
+  final VoidCallback? callback;
+  final Key switchKey;
+
+  @override
+  State<_TestAnimatedThemeWidget> createState() => _TestAnimatedThemeWidgetState();
+}
+
+class _TestAnimatedThemeWidgetState extends State<_TestAnimatedThemeWidget> {
+  bool toggle = false;
+
+  @override
+  Widget build(BuildContext context) {
+    return Stack(
+      children: <Widget>[
+        AnimatedTheme(
+          data: toggle ? ThemeData.dark() : ThemeData(),
+          duration: _animationDuration,
+          onEnd: widget.callback,
+          child: const Placeholder(),
+        ),
+        GestureDetector(
+          key: widget.switchKey,
+          behavior: HitTestBehavior.opaque,
+          onTap: () {
+            setState(() {
+              toggle = !toggle;
+            });
+          },
+          child: const SizedBox(width: 48.0, height: 48.0),
+        ),
+      ],
+    );
+  }
+}

From 40a717602235c6a68acc66a98333ce01404f1334 Mon Sep 17 00:00:00 2001
From: Justin McCandless <jmccandless@google.com>
Date: Mon, 17 Aug 2026 14:27:40 -0700
Subject: [PATCH 2/2] Correct license

---
 packages/material_ui/test/animated_theme_test.dart | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/packages/material_ui/test/animated_theme_test.dart b/packages/material_ui/test/animated_theme_test.dart
index 6f278ffdcf5..f58da402bad 100644
--- a/packages/material_ui/test/animated_theme_test.dart
+++ b/packages/material_ui/test/animated_theme_test.dart
@@ -1,4 +1,4 @@
-// Copyright 2014 The Flutter Authors. All rights reserved.
+// Copyright 2013 The Flutter Authors
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.