add test cases for TS-4721

tests/army/enterprise/alter/alterConfig.py

@@ -0,0 +1,55 @@
+###################################################################
+#           Copyright (c) 2016 by TAOS Technologies, Inc.
+#                     All rights reserved.
+#
+#  This file is proprietary and confidential to TAOS Technologies.
+#  No part of this file may be reproduced, stored, transmitted,
+#  disclosed or used in any form or by any means other than as
+#  expressly provided by the written permission from Jianhui Tao
+#
+###################################################################
+
+# -*- coding: utf-8 -*-
+
+import sys
+import time
+
+import taos
+import frame
+import frame.etool
+
+from frame.log import *
+from frame.cases import *
+from frame.sql import *
+from frame.caseBase import *
+from frame import *
+
+
+class TDTestCase(TBase):
+    def alterSupportVnodes(self):
+        tdLog.info(f"test function of altering supportVnodes")
+
+        tdSql.execute("alter dnode 1 'supportVnodes' '128'")
+        time.sleep(1)
+        tdSql.query('show dnodes')
+        tdSql.checkData(0, 3, "128")
+        
+        tdSql.execute("alter dnode 1 'supportVnodes' '64'")
+        time.sleep(1)
+        tdSql.query('show dnodes')
+        tdSql.checkData(0, 3, "64")
+
+    # run
+    def run(self):
+        tdLog.debug(f"start to excute {__file__}")
+
+        # TS-4721
+        self.alterSupportVnodes()
+
+
+        tdLog.success(f"{__file__} successfully executed")
+
+        
+
+tdCases.addLinux(__file__, TDTestCase())
+tdCases.addWindows(__file__, TDTestCase())