Fix for "Pass RouteSettings to the internal Route in showCupertinoModalPopup" (#67990)

packages/flutter/lib/src/cupertino/route.dart

@@ -1031,6 +1031,9 @@ class _CupertinoModalPopupRoute<T> extends PopupRoute<T> {
 /// The `semanticsDismissible` argument is used to determine whether the
 /// semantics of the modal barrier are included in the semantics tree.
 ///
+/// The `routeSettings` argument is used to provide [RouteSettings] to the
+/// created Route.
+///
 /// The `builder` argument typically builds a [CupertinoActionSheet] widget.
 /// Content below the widget is dimmed with a [ModalBarrier]. The widget built
 /// by the `builder` does not share a context with the location that
@@ -1054,6 +1057,7 @@ Future<T> showCupertinoModalPopup<T>({
   bool barrierDismissible = true,
   bool useRootNavigator = true,
   bool? semanticsDismissible,
+  RouteSettings? routeSettings,
 }) {
   assert(useRootNavigator != null);
   return Navigator.of(context, rootNavigator: useRootNavigator)!.push(
@@ -1064,6 +1068,7 @@ Future<T> showCupertinoModalPopup<T>({
       builder: builder,
       filter: filter,
       semanticsDismissible: semanticsDismissible,
+      settings: routeSettings,
     ),
   );
 }

packages/flutter/test/cupertino/route_test.dart

@@ -1345,6 +1345,38 @@ void main() {
     debugDefaultTargetPlatformOverride = null;
   });
 
+  testWidgets('showCupertinoModalPopup passes RouteSettings to PopupRoute', (WidgetTester tester) async {
+    final RouteSettingsObserver routeSettingsObserver = RouteSettingsObserver();
+
+    await tester.pumpWidget(CupertinoApp(
+      navigatorObservers: <NavigatorObserver>[routeSettingsObserver],
+      home: Navigator(
+        onGenerateRoute: (RouteSettings settings) {
+          return PageRouteBuilder<dynamic>(
+            pageBuilder: (BuildContext context, Animation<double> _,
+                Animation<double> __) {
+              return GestureDetector(
+                onTap: () async {
+                  await showCupertinoModalPopup<void>(
+                    context: context,
+                    builder: (BuildContext context) => const SizedBox(),
+                    routeSettings: const RouteSettings(name: '/modal'),
+                  );
+                },
+                child: const Text('tap'),
+              );
+            },
+          );
+        },
+      ),
+    ));
+
+    // Open the dialog.
+    await tester.tap(find.text('tap'));
+
+    expect(routeSettingsObserver.routeName, '/modal');
+  });
+
   testWidgets('showCupertinoModalPopup transparent barrier color is transparent', (WidgetTester tester) async {
     const Color _kTransparentColor = Color(0x00000000);
 
@@ -1657,6 +1689,18 @@ class DialogObserver extends NavigatorObserver {
   }
 }
 
+class RouteSettingsObserver extends NavigatorObserver {
+  String? routeName;
+
+  @override
+  void didPush(Route<dynamic> route, Route<dynamic>? previousRoute) {
+    if (route.toString().contains('_CupertinoModalPopupRoute')) {
+      routeName = route.settings.name;
+    }
+    super.didPush(route, previousRoute);
+  }
+}
+
 class TransitionDetector extends DefaultTransitionDelegate<void> {
   bool hasTransition = false;
   @override