adds tests

Author: pcrespov

packages/postgres-database/tests/test_tags_repo.py

@@ -20,6 +20,7 @@
 )
 from simcore_postgres_database.tags_sql import (
     add_tag_to_project_stmt,
+    add_tag_to_services_stmt,
     create_tag_stmt,
     delete_tag_stmt,
     get_tag_stmt,
@@ -596,3 +597,10 @@ def _check(func_smt, **kwargs):
         project_index=project_index,
         tag_id=tag_id,
     )
+
+    _check(
+        add_tag_to_services_stmt,
+        key=service_key,
+        version=service_version,
+        tag_id=tag_id,
+    )