From 357bd6574971af634066d9ff9c1fc1320edf71f7 Mon Sep 17 00:00:00 2001
From: Valentin Vignal <32538273+ValentinVignal@users.noreply.github.com>
Date: Wed, 22 May 2024 06:19:04 +0800
Subject: [PATCH] Add test for undo_history_controller.0.dart (#148205)

Contributes to https://github.com/flutter/flutter/issues/130459

It adds test for `examples/api/test/widgets/undo_history/undo_history_controller.0_test.dart`.
---
 dev/bots/check_code_samples.dart              |  1 -
 .../undo_history_controller.0_test.dart       | 50 +++++++++++++++++++
 2 files changed, 50 insertions(+), 1 deletion(-)
 create mode 100644 examples/api/test/widgets/undo_history/undo_history_controller.0_test.dart

diff --git a/dev/bots/check_code_samples.dart b/dev/bots/check_code_samples.dart
index 58c8e547a0..e31a20a8a1 100644
--- a/dev/bots/check_code_samples.dart
+++ b/dev/bots/check_code_samples.dart
@@ -420,7 +420,6 @@ final Set<String> _knownMissingTests = <String>{
   'examples/api/test/widgets/notification_listener/notification.0_test.dart',
   'examples/api/test/widgets/editable_text/text_editing_controller.0_test.dart',
   'examples/api/test/widgets/editable_text/editable_text.on_changed.0_test.dart',
-  'examples/api/test/widgets/undo_history/undo_history_controller.0_test.dart',
   'examples/api/test/widgets/overscroll_indicator/glowing_overscroll_indicator.1_test.dart',
   'examples/api/test/widgets/overscroll_indicator/glowing_overscroll_indicator.0_test.dart',
   'examples/api/test/widgets/tween_animation_builder/tween_animation_builder.0_test.dart',
diff --git a/examples/api/test/widgets/undo_history/undo_history_controller.0_test.dart b/examples/api/test/widgets/undo_history/undo_history_controller.0_test.dart
new file mode 100644
index 0000000000..91422a29f3
--- /dev/null
+++ b/examples/api/test/widgets/undo_history/undo_history_controller.0_test.dart
@@ -0,0 +1,50 @@
+// 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_api_samples/widgets/undo_history/undo_history_controller.0.dart' as example;
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  testWidgets('The undo history controller should undo and redo the history changes', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const example.UndoHistoryControllerExampleApp(),
+    );
+
+    // Equals to UndoHistoryState._kThrottleDuration.
+    const Duration kThrottleDuration = Duration(milliseconds: 500);
+
+    expect(find.byType(TextField), findsOne);
+    expect(find.widgetWithText(TextButton, 'Undo'), findsOne);
+    expect(find.widgetWithText(TextButton, 'Redo'), findsOne);
+
+    await tester.enterText(find.byType(TextField), '1st change');
+    await tester.pump(kThrottleDuration);
+    expect(find.text('1st change'), findsOne);
+
+    await tester.enterText(find.byType(TextField), '2nd change');
+    await tester.pump(kThrottleDuration);
+    expect(find.text('2nd change'), findsOne);
+
+    await tester.enterText(find.byType(TextField), '3rd change');
+    await tester.pump(kThrottleDuration);
+    expect(find.text('3rd change'), findsOne);
+
+    await tester.tap(find.text('Undo'));
+    await tester.pump();
+    expect(find.text('2nd change'), findsOne);
+
+    await tester.tap(find.text('Undo'));
+    await tester.pump();
+    expect(find.text('1st change'), findsOne);
+
+    await tester.tap(find.text('Redo'));
+    await tester.pump();
+    expect(find.text('2nd change'), findsOne);
+
+    await tester.tap(find.text('Redo'));
+    await tester.pump();
+    expect(find.text('3rd change'), findsOne);
+  });
+}