test: [TS-5067] add test cases for the drop consumer group statement

tests/system-test/7-tmq/tmq_taosx.py

@@ -516,17 +516,17 @@ class TDTestCase:
             "td.connect.pass": "taosdata",
             "auto.offset.reset": "earliest",
         }
-        consumer = Consumer(consumer_dict)
+        consumer1 = Consumer(consumer_dict)
 
         try:
-            consumer.subscribe(["t1"])
+            consumer1.subscribe(["t1"])
         except TmqError:
             tdLog.exit(f"subscribe error")
 
         index = 0
         try:
             while True:
-                res = consumer.poll(1)
+                res = consumer1.poll(1)
                 if not res:
                     if index != 1:
                         tdLog.exit("consume error")
@@ -543,18 +543,71 @@ class TDTestCase:
 
                 index += 1
         finally:
-            consumer.close()
+            consumer1.close()
 
-        consumer1 = Consumer(consumer_dict)
+        consumer2 = Consumer(consumer_dict)
         try:
-            consumer1.subscribe(["t2"])
+            consumer2.subscribe(["t2"])
         except TmqError:
             tdLog.exit(f"subscribe error")
 
+        tdSql.query(f'show subscriptions')
+        tdSql.checkRows(2)
+
+        tdSql.query(f'show consumers')
+        tdSql.checkRows(1)
         tdSql.execute(f'drop consumer group g1 on t1')
         tdSql.query(f'show consumers')
         tdSql.checkRows(1)
-        consumer1.close()
+
+        tdSql.query(f'show subscriptions')
+        tdSql.checkRows(1)
+
+        index = 0
+        try:
+            while True:
+                res = consumer2.poll(1)
+                if not res:
+                    if index != 1:
+                        tdLog.exit("consume error")
+                    break
+                val = res.value()
+                if val is None:
+                    continue
+                cnt = 0;
+                for block in val:
+                    cnt += len(block.fetchall())
+
+                if cnt != 8:
+                    tdLog.exit("consume error")
+
+                index += 1
+        finally:
+            consumer2.close()
+
+        consumer3 = Consumer(consumer_dict)
+        try:
+            consumer3.subscribe(["t2"])
+        except TmqError:
+            tdLog.exit(f"subscribe error")
+
+        tdSql.query(f'show consumers')
+        tdSql.checkRows(1)
+
+        tdSql.execute(f'insert into t4 using st tags(3) values(now, 1)')
+        try:
+            res = consumer3.poll(1)
+            if not res:
+                tdLog.exit("consume1 error")
+        finally:
+            consumer3.close()
+
+        tdSql.query(f'show consumers')
+        tdSql.checkRows(0)
+
+        tdSql.query(f'show subscriptions')
+        tdSql.checkRows(1)
+
         tdSql.execute(f'drop topic t1')
         tdSql.execute(f'drop topic t2')
         tdSql.execute(f'drop database d1')