test: add test case for TS-1500

tests/parallel_test/cases.task

@@ -685,6 +685,7 @@
 5,,develop-test,python3 ./test.py -f 2-query/function_mavg.py
 4,,system-test,python3 test.py -f 4-taosAdapter/TD-12163.py 
 4,,pytest,python3 test.py -f user/pass_len.py 
+4,,pytest,python3 test.py -f client/dropTable.py  
 4,,pytest,python3 test.py -f TimeZone/TestCaseTimeZone.py 
 4,,pytest,python3 test.py -f tag_lite/unsignedBigint.py 
 4,,pytest,python3 test.py -f tag_lite/tinyint.py 

tests/pytest/client/dropTable.py

+###################################################################
+#           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 taos
+from util.log import *
+from util.cases import *
+from util.sql import *
+from util.dnodes import *
+import multiprocessing as mp
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor())
+        self.ts = 1609430400000
+
+    def run(self):
+        tdSql.prepare()
+        os.system("taos -s 'create table db.st(ts timestamp, c1 int, c2 float) tags(t1 int)' ")
+        os.system("taos -s 'create table db.t1 using db.st tags(1)' ")
+        os.system("taos -s 'insert into t1 values(%d, 1, 1.11)'" % self.ts)        
+        os.system("taos -s 'desc db.st'")
+        tdSql.query("desc db.st")
+        tdSql.checkRows(4)
+
+        os.system("taos -s 'drop table db.st'")
+        tdSql.error("select * from db.st")        
+        tdSql.error("desc db.st")
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())
\ No newline at end of file