From 8f5d032d7847b601b4cc4aac9719cf275572cbfc Mon Sep 17 00:00:00 2001
From: Valentin Vignal <32538273+ValentinVignal@users.noreply.github.com>
Date: Mon, 28 Oct 2024 16:10:19 +0800
Subject: [PATCH] Add tests for `navigator_state.restorable_push.0.dart`
 (#157667)

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

It adds a test for
- `examples/api/lib/widgets/navigator/navigator_state.restorable_push.0.dart`
---
 dev/bots/check_code_samples.dart              |  1 -
 .../navigator_state.restorable_push.0.dart    |  8 ++-
 ...avigator_state.restorable_push.0_test.dart | 52 +++++++++++++++++++
 3 files changed, 58 insertions(+), 3 deletions(-)
 create mode 100644 examples/api/test/widgets/navigator/navigator_state.restorable_push.0_test.dart

diff --git a/dev/bots/check_code_samples.dart b/dev/bots/check_code_samples.dart
index ae636580f2..e2d7104957 100644
--- a/dev/bots/check_code_samples.dart
+++ b/dev/bots/check_code_samples.dart
@@ -312,7 +312,6 @@ final Set<String> _knownMissingTests = <String>{
   'examples/api/test/material/color_scheme/dynamic_content_color.0_test.dart',
   'examples/api/test/widgets/navigator/navigator.restorable_push_replacement.0_test.dart',
   'examples/api/test/widgets/navigator/restorable_route_future.0_test.dart',
-  'examples/api/test/widgets/navigator/navigator_state.restorable_push.0_test.dart',
   'examples/api/test/widgets/focus_manager/focus_node.unfocus.0_test.dart',
   'examples/api/test/widgets/nested_scroll_view/nested_scroll_view_state.0_test.dart',
   'examples/api/test/widgets/scroll_position/scroll_metrics_notification.0_test.dart',
diff --git a/examples/api/lib/widgets/navigator/navigator_state.restorable_push.0.dart b/examples/api/lib/widgets/navigator/navigator_state.restorable_push.0.dart
index cb45abe8ba..11c038fb56 100644
--- a/examples/api/lib/widgets/navigator/navigator_state.restorable_push.0.dart
+++ b/examples/api/lib/widgets/navigator/navigator_state.restorable_push.0.dart
@@ -13,8 +13,12 @@ class RestorablePushExampleApp extends StatelessWidget {
 
   @override
   Widget build(BuildContext context) {
-    return const MaterialApp(
-      home: RestorablePushExample(),
+    return const RootRestorationScope(
+      restorationId: 'app',
+      child: MaterialApp(
+        restorationScopeId: 'app',
+        home: RestorablePushExample(),
+      ),
     );
   }
 }
diff --git a/examples/api/test/widgets/navigator/navigator_state.restorable_push.0_test.dart b/examples/api/test/widgets/navigator/navigator_state.restorable_push.0_test.dart
new file mode 100644
index 0000000000..5c3f284886
--- /dev/null
+++ b/examples/api/test/widgets/navigator/navigator_state.restorable_push.0_test.dart
@@ -0,0 +1,52 @@
+// 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/navigator/navigator_state.restorable_push.0.dart' as example;
+import 'package:flutter_test/flutter_test.dart';
+
+void main() {
+  testWidgets('It pushes a restorable route and pops it', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const example.RestorablePushExampleApp(),
+    );
+
+    expect(find.widgetWithText(AppBar, 'Sample Code'), findsOne);
+    expect(find.byType(BackButton), findsNothing);
+
+    await tester.tap(find.widgetWithIcon(FloatingActionButton, Icons.add));
+    await tester.pumpAndSettle();
+
+    await tester.tap(find.byType(BackButton));
+    await tester.pumpAndSettle();
+
+    expect(find.byType(BackButton), findsNothing);
+  });
+
+  testWidgets('It pushes a restorable route and restores it', (WidgetTester tester) async {
+    await tester.pumpWidget(
+      const example.RestorablePushExampleApp(),
+    );
+
+    expect(find.widgetWithText(AppBar, 'Sample Code'), findsOne);
+    expect(find.byType(BackButton), findsNothing);
+
+    await tester.tap(find.widgetWithIcon(FloatingActionButton, Icons.add));
+    await tester.pumpAndSettle();
+
+    await tester.restartAndRestore();
+
+    expect(find.byType(BackButton), findsOne);
+
+    final TestRestorationData data = await tester.getRestorationData();
+
+    await tester.tap(find.byType(BackButton));
+    await tester.pumpAndSettle();
+
+    expect(find.byType(BackButton), findsNothing);
+
+    await tester.restoreFrom(data);
+    expect(find.byType(BackButton), findsOne);
+  });
+}