✅ Write a test for replace

packages/go_router/test/go_router_delegate_test.dart

@@ -78,6 +78,52 @@ void main() {
     );
   });
 
+  group('replace', () {
+    testWidgets(
+      'It should replace the last match with the given one',
+      (WidgetTester tester) async {
+        final GoRouter goRouter = GoRouter(
+          initialLocation: '/',
+          routes: <GoRoute>[
+            GoRoute(path: '/', builder: (_, __) => const SizedBox()),
+            GoRoute(path: '/page-0', builder: (_, __) => const SizedBox()),
+            GoRoute(path: '/page-1', builder: (_, __) => const SizedBox()),
+          ],
+        );
+        await tester.pumpWidget(
+          MaterialApp.router(
+            routeInformationProvider: goRouter.routeInformationProvider,
+            routeInformationParser: goRouter.routeInformationParser,
+            routerDelegate: goRouter.routerDelegate,
+          ),
+        );
+
+        goRouter.push('/page-0');
+
+        goRouter.routerDelegate.addListener(expectAsync0(() {}));
+        final GoRouteMatch first = goRouter.routerDelegate.matches.first;
+        final GoRouteMatch last = goRouter.routerDelegate.matches.last;
+        goRouter.replace('/page-1');
+        expect(goRouter.routerDelegate.matches.length, 2);
+        expect(
+          goRouter.routerDelegate.matches.first,
+          first,
+          reason: 'The first match should still be in the list of matches',
+        );
+        expect(
+          goRouter.routerDelegate.matches.last,
+          isNot(last),
+          reason: 'The last match should have been removed',
+        );
+        expect(
+          goRouter.routerDelegate.matches.last.fullpath,
+          '/page-1',
+          reason: 'The new location should have been pushed',
+        );
+      },
+    );
+  });
+
   testWidgets('dispose unsubscribes from refreshListenable',
       (WidgetTester tester) async {
     final FakeRefreshListenable refreshListenable = FakeRefreshListenable();