feat: added navigator helper method

test/helpers/helpers.dart

@@ -8,4 +8,5 @@ export 'builders.dart';
 export 'extensions.dart';
 export 'key_testers.dart';
 export 'mocks.dart';
+export 'navigator.dart';
 export 'pump_app.dart';

test/helpers/navigator.dart

@@ -0,0 +1,27 @@
+import 'package:flutter/material.dart';
+import 'package:flutter_test/flutter_test.dart';
+
+import 'helpers.dart';
+
+Future<void> expectNavigatesTo<Type>(WidgetTester tester, Route route) async {
+  // ignore: avoid_dynamic_calls
+  await tester.pumpApp(
+    Scaffold(
+      body: Builder(
+        builder: (context) {
+          return ElevatedButton(
+            onPressed: () {
+              Navigator.of(context).push<void>(route);
+            },
+            child: const Text('Tap me'),
+          );
+        },
+      ),
+    ),
+  );
+
+  await tester.tap(find.text('Tap me'));
+  await tester.pumpAndSettle();
+
+  expect(find.byType(Type), findsOneWidget);
+}

test/leaderboard/view/leaderboard_page_test.dart

@@ -23,29 +23,12 @@ void main() {
     });
 
     testWidgets('route returns a valid navigation route', (tester) async {
-      await tester.pumpApp(
-        Scaffold(
-          body: Builder(
-            builder: (context) {
-              return ElevatedButton(
-                onPressed: () {
-                  Navigator.of(context).push<void>(
+      await expectNavigatesTo<LeaderboardPage>(
+        tester,
         LeaderboardPage.route(
           theme: DashTheme(),
         ),
       );
-                },
-                child: const Text('Tap me'),
-              );
-            },
-          ),
-        ),
-      );
-
-      await tester.tap(find.text('Tap me'));
-      await tester.pumpAndSettle();
-
-      expect(find.byType(LeaderboardPage), findsOneWidget);
     });
   });