test:add failed connection of client and server

tests/system-test/0-others/compatibility.py

@@ -97,7 +97,7 @@ class TDTestCase:
 
     def buildTaosd(self,bPath):
         # os.system(f"mv {bPath}/build_bak  {bPath}/build ")
-        os.system(f" cd {bPath}  &&  make install ")
+        os.system(f" cd {bPath}  ")
 
 
     def run(self):
@@ -142,6 +142,10 @@ class TDTestCase:
         tdLog.info(" LD_LIBRARY_PATH=/usr/lib  taosBenchmark -f 0-others/compa4096.json -y  ")
         os.system("LD_LIBRARY_PATH=/usr/lib  taosBenchmark -f 0-others/compa4096.json -y")
         os.system("LD_LIBRARY_PATH=/usr/lib  taos -s 'flush database db4096 '")
+        cmd = f" LD_LIBRARY_PATH={bPath}/build/lib  {bPath}/build/bin/taos -h localhost ;"
+        if os.system(cmd) == 0:
+            raise Exception("failed to execute system command. cmd: %s" % cmd)
+                
         os.system("pkill  taosd")   # make sure all the data are saved in disk.
         self.checkProcessPid("taosd")
 
@@ -152,8 +156,10 @@ class TDTestCase:
         sleep(1)
         tdsql=tdCom.newTdSql()
         print(tdsql)
-
-
+        cmd = f" LD_LIBRARY_PATH=/usr/lib  taos -h localhost ;"
+        if os.system(cmd) == 0:
+            raise Exception("failed to execute system command. cmd: %s" % cmd)
+        
         tdsql.query(f"SELECT SERVER_VERSION();")
         nowServerVersion=tdsql.queryResult[0][0]
         tdLog.info(f"New server version is {nowServerVersion}")