test:add test case for alter buffer and pages

tests/system-test/1-insert/alter_database.py

+import taos
+import sys
+import time
+import socket
+import os
+import threading
+
+from util.log import *
+from util.sql import *
+from util.cases import *
+from util.dnodes import *
+
+class TDTestCase:
+    def init(self, conn, logSql):
+        tdLog.debug("start to execute %s" % __file__)
+        tdSql.init(conn.cursor(),logSql)
+        self.buffer_boundary = [3,4097,8193,12289,16384]
+        self.buffer_error = [self.buffer_boundary[0]-1,self.buffer_boundary[-1]+1,12289,96]
+        # pages_boundary >= 64
+        self.pages_boundary = [64,128,512]
+        self.pages_error = [256,self.pages_boundary[0]-1]
+    def alter_buffer(self):
+        tdSql.execute('create database db')
+        for buffer in self.buffer_boundary:
+            tdSql.execute(f'alter database db buffer {buffer}')
+            tdSql.query('select * from information_schema.ins_databases where name = "db"')
+            tdSql.checkEqual(tdSql.queryResult[0][8],buffer)    
+        tdSql.execute('drop database db')
+        tdSql.execute('create database db vgroups 10')
+        for buffer in self.buffer_error:
+            tdSql.error(f'alter database db buffer {buffer}')
+        tdSql.execute('drop database db')
+    
+    def alter_pages(self):
+        tdSql.execute('create database db')
+        for pages in self.pages_boundary:
+            tdSql.execute(f'alter database db pages {pages}')
+            tdSql.query('select * from information_schema.ins_databases where name = "db"')
+            tdSql.checkEqual(tdSql.queryResult[0][10],pages)
+        tdSql.execute('drop database db')
+        tdSql.execute('create database db')
+        for pages in self.pages_error:
+            tdSql.error(f'alter database db pages {pages}')
+        tdSql.execute('drop database db')
+
+    def run(self):
+        tdSql.error('create database db1 vgroups 10 buffer 12289')
+        self.alter_buffer()
+        self.alter_pages()
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success(f"{__file__} successfully executed")
+
+tdCases.addLinux(__file__, TDTestCase())
+tdCases.addWindows(__file__, TDTestCase())
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