Merge pull request #4082 from taosdata/xiaoping/add_test_case2

[TD-1864]<test> add test case for sliding

tests/pytest/query/sliding.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 tdLog
+from util.cases import tdCases
+from util.sql import tdSql
+import random
+
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(), logSql)
+
+        self.ts = 1500000000000
+
+    def run(self):
+        tdSql.prepare()
+        
+        tdSql.execute("create table meters(ts timestamp, col1 int) tags(id int, loc nchar(20))")
+        sql = "insert into t0 using meters tags(1, 'beijing') values"
+        for i in range(100):
+            sql += "(%d, %d)" % (self.ts + i * 1000, random.randint(1, 100))        
+        tdSql.execute(sql)   
+
+        sql = "insert into t1 using meters tags(2, 'shanghai') values"
+        for i in range(100):
+            sql += "(%d, %d)" % (self.ts + i * 1000, random.randint(1, 100))        
+        tdSql.execute(sql)
+        
+        tdSql.query("select count(*) from meters interval(10s) sliding(5s)")
+        tdSql.checkRows(21)
+
+        tdSql.error("select count(*) from meters sliding(5s)")
+
+        tdSql.error("select count(*) from meters sliding(5s) interval(10s)")
+
+        tdSql.error("select * from meters sliding(5s) order by ts desc")
+                
+        tdSql.query("select count(*) from meters group by loc")
+        tdSql.checkRows(2)
+
+        tdSql.error("select * from meters group by loc sliding(5s)")    
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success("%s successfully executed" % __file__)
+
+
+tdCases.addWindows(__file__, TDTestCase())
+tdCases.addLinux(__file__, TDTestCase())