-xbt_error_t test_int(gras_socket_t sock, int direction);
-xbt_error_t test_float(gras_socket_t sock, int direction);
-xbt_error_t test_double(gras_socket_t sock, int direction);
-xbt_error_t test_array(gras_socket_t sock, int direction);
-xbt_error_t test_dynar_scal(gras_socket_t sock, int direction);
-xbt_error_t test_intref(gras_socket_t sock, int direction);
-xbt_error_t test_string(gras_socket_t sock, int direction);
+void test_int(gras_socket_t sock, int direction);
+void test_float(gras_socket_t sock, int direction);
+void test_double(gras_socket_t sock, int direction);
+void test_array(gras_socket_t sock, int direction);
+void test_dynar_scal(gras_socket_t sock, int direction);
+void test_intref(gras_socket_t sock, int direction);
+void test_string(gras_socket_t sock, int direction);