enh:[TD-32187]test tmq api

source/client/src/clientTmq.c

@@ -41,7 +41,7 @@
 
 
 #define SET_ERROR_MSG_TMQ(MSG) \
-  if (errstr != NULL) (void)snprintf(errstr, errstrLen, MSG);
+  if (errstr != NULL && errstrLen > 0) (void)snprintf(errstr, errstrLen, MSG);
 
 #define PROCESS_POLL_RSP(FUNC,DATA) \
   SDecoder decoder = {0}; \

source/client/test/tmqTest.cpp

@@ -33,9 +33,10 @@ int main(int argc, char** argv) {
   return RUN_ALL_TESTS();
 }
 
-TEST(testCase, driverInit_Test) {
-  // taosInitGlobalCfg();
-  //  taos_init();
+TEST(testCase, tmq_api_Test) {
+  tmq_conf_t *conf = tmq_conf_new();
+  char msg[128] = {0};
+  tmq_consumer_new(NULL, msg, -1);
 }
 
 TEST(testCase, create_topic_ctb_Test) {

tests/system-test/7-tmq/td-32187.py

@@ -0,0 +1,80 @@
+
+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 *
+from util.common import *
+from taos.tmq import *
+sys.path.append("./7-tmq")
+from tmqCommon import *
+
+class TDTestCase:
+    clientCfgDict = {'debugFlag': 135}
+    updatecfgDict = {'debugFlag': 135, 'clientCfg':clientCfgDict}
+    # updatecfgDict = {'debugFlag': 135, 'clientCfg':clientCfgDict, 'tmqRowSize':1}
+
+    def init(self, conn, logSql, replicaVar=1):
+        tdLog.debug(f"start to excute {__file__}")
+        tdSql.init(conn.cursor())
+
+    def consume_test(self):
+
+        tdSql.execute(f'create database if not exists d1')
+        tdSql.execute(f'use d1')
+        tdSql.execute(f'create table st(ts timestamp, i int) tags(t int)')
+        tdSql.execute(f'insert into t1 using st tags(1) values(now, 1) (now+1s, 2)')
+        tdSql.execute(f'insert into t2 using st tags(2) values(now, 1) (now+1s, 2)')
+        tdSql.execute(f'insert into t3 using st tags(3) values(now, 1) (now+1s, 2)')
+
+
+        tdSql.execute(f'create topic topic_all as select * from st')
+        consumer_dict = {
+            "group.id": "g1",
+            "td.connect.user": "root",
+            "td.connect.pass": "taosdata",
+            "auto.offset.reset": "earliest",
+        }
+        consumer = Consumer(consumer_dict)
+
+        try:
+            consumer.unsubscribe()
+            consumer.unsubscribe()
+            consumer.subscribe(["topic_all"])
+            consumer.subscribe(["topic_all"])
+        except TmqError:
+            tdLog.exit(f"subscribe error")
+
+        cnt = 0
+        try:
+            while True:
+                res = consumer.poll(2)
+                if not res:
+                    break
+                val = res.value()
+                if val is None:
+                    print(f"null val")
+                    continue
+                for block in val:
+                    cnt += len(block.fetchall())
+
+                print(f"block {cnt} rows")
+
+        finally:
+            consumer.unsubscribe();
+            consumer.close()
+    def run(self):
+        self.consume_test()
+
+    def stop(self):
+        tdSql.close()
+        tdLog.success(f"{__file__} successfully executed")
+
+tdCases.addLinux(__file__, TDTestCase())
+tdCases.addWindows(__file__, TDTestCase())