feat: trigger mock navigator pop call when pop occurs (#5)

Author: jeroen-meijer

lib/mock_navigator.dart

@@ -64,7 +64,7 @@ class _MockNavigatorState extends NavigatorState {
   Future<T?> push<T extends Object?>(Route<T> route) => navigator.push(route);
 
   @override
-  void pop<T extends Object?>([T? result]) {}
+  void pop<T extends Object?>([T? result]) => navigator.pop(result);
 
   @override
   Widget build(BuildContext context) => child!;

test/mock_navigator_test.dart

@@ -67,5 +67,7 @@ void main() {
 
       expect(pushCalled, equals(1));
     });
+
+    // TODO: Add 'mocks .pop calls' test
   });
 }