test: [TS-5103] add test case for window fill value query

tests/army/query/window/fill_value.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
+from frame.log import *
+from frame.cases import *
+from frame.sql import *
+
+class TDTestCase:
+    # init
+    def init(self, conn, logSql, replicaVar=1):
+        self.replicaVar = int(replicaVar)
+        tdLog.debug(f"start to excute {__file__}")
+        tdSql.init(conn.cursor(), True)
+
+    # run
+    def run(self):
+        # init dtabase, table, data
+        tdSql.execute("create database test_db;")
+        tdSql.execute("create table test_db.test_tb (ts timestamp, k int);")
+        tdSql.execute("insert into test_db.test_tb values \
+                      ('2024-05-03 00:00:00.000', 2) \
+                      ('2024-06-03 00:00:00.000', 3);")
+        # query and check
+        tdSql.queryAndCheckResult(["""
+            select _wstart, _wend, ts, max(k) 
+            from test_db.test_tb 
+            where ts between '2024-05-03 00:00:00.000' and '2024-06-03 00:00:00.000' 
+            interval(1h) fill(value, 0, 0) limit 2;"""], 
+            [[
+                ['2024-05-03 00:00:00.000', '2024-05-03 01:00:00.000', '2024-05-03 00:00:00.000', 2], 
+                ['2024-05-03 01:00:00.000', '2024-05-03 02:00:00.000', '1970-01-01 00:00:00.000', 0], # fill `ts` with 0
+            ]]
+        )
+    # stop
+    def stop(self):
+        tdSql.execute("drop database test_db;")
+        tdSql.close()
+        tdLog.success(f"{__file__} successfully executed")
+
+tdCases.addLinux(__file__, TDTestCase())
+tdCases.addWindows(__file__, TDTestCase())