Третий тест покрыт фикстурой

tests/fixtures/AuthRegistrationExecutorTestFixture.h

@@ -7,9 +7,15 @@
 #include <mysqlx/xdevapi.h>
 #include "./../../src/endpoints_handlers/AuthRegistrationExecutor.h"
 #include "./../../src/DAO/MySQLUserDAO.h"
+#include "./../../src/db/mysql_connector.h"
 
 namespace uad
 {
+struct fixture_helper
+{
+  explicit fixture_helper(mysqlx::Session* session);
+};
+
 class AuthRegistrationExecutorTestFixture {
 public:
   using RouteAuthRegistrationExecutor = AuthRegistrationExecutor<boost::beast::http::string_body,
@@ -20,11 +26,12 @@ public:
   char** argv;
 
   const std::string mysql_credentials;
-
   mysqlx::Session* mysql_session;
 
-  std::shared_ptr<MySQLUserDAO> user_dao;
-  std::unique_ptr<RouteAuthRegistrationExecutor> executor;
+  fixture_helper helper;
+
+  std::shared_ptr<IUserDAO> user_dao;
+  RouteAuthRegistrationExecutor executor;
 
   Request req;