added dbms property in format description event test

Author: roy0424

pymysqlreplication/tests/test_basic.py

@@ -647,6 +647,7 @@ def test_format_description_event(self):
         self.assertIsInstance(event.post_header_len, tuple)
         self.assertIsInstance(event.mysql_version, tuple)
         self.assertEqual(len(event.mysql_version), 3)
+        self.assertEqual(event.dbms, "mysql")
         self.assertIsInstance(event.server_version_split, tuple)
         self.assertEqual(len(event.server_version_split), 3)
         self.assertIsInstance(event.number_of_event_types, int)
@@ -1491,6 +1492,7 @@ def test_format_description_event(self):
         self.assertIsInstance(event.post_header_len, tuple)
         self.assertIsInstance(event.mysql_version, tuple)
         self.assertEqual(len(event.mysql_version), 3)
+        self.assertEqual(event.dbms, "mariadb")
         self.assertIsInstance(event.server_version_split, tuple)
         self.assertEqual(len(event.server_version_split), 3)
         self.assertIsInstance(event.number_of_event_types, int)