[TD-4439] add test case

tests/pytest/fulltest.sh

@@ -334,5 +334,6 @@ python3 ./test.py -f tag_lite/alter_tag.py
 
 python3 test.py -f tools/taosdemoAllTest/taosdemoTestInsertWithJson.py 
 python3 test.py -f tools/taosdemoAllTest/taosdemoTestQueryWithJson.py
+python3 test.py -f insert/insert_before_use_db.py
 
 #======================p4-end===============

tests/pytest/insert/insert_before_use_db.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
+from util.log import *
+from util.cases import *
+from util.sql import *
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+    def run(self):
+        tdSql.error('insert into tb values (now + 10m, 10)')
+        
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())