tests, find broken test

tests/app.cpp

@@ -340,7 +340,7 @@ int main()
         []() -> void { test_help_when_no_command_expect_see_all_commands_helps(); },
         []() -> void { test_help_when_register_command_expect_no_other_commands(); },
         []() -> void { test_help_when_command_not_exist_expect_error(); },
-        //        []() -> void { test_add_car_when_register_as_admin_expect_car_created(); },
+        []() -> void { test_add_car_when_register_as_admin_expect_car_created(); },
         //        []() -> void { test_car_list_by_customer_when_car_created_by_admin_expect_customer_sees_car(); },
         //        []() -> void { test_calculate_rent_when_car_available_expect_correct_price(); },
         //        []() -> void { test_calculate_or_book_when_car_booked_expect_error_when_dates_not_available(); },