[TD-2310]<test> add test case for stream dest table

tests/pytest/stream/stream2.py

@@ -88,6 +88,10 @@ class TDTestCase:
         except Exception as e:
             tdLog.info(repr(e))
         
+        tdSql.query("show streams")
+        tdSql.checkRows(1)
+        tdSql.checkData(0, 2, 's0')
+
         tdLog.info("===== step8 =====")
         tdSql.query(
             "select count(*), count(col1), count(col2) from stb0 interval(1d)")
@@ -142,6 +146,12 @@ class TDTestCase:
         except Exception as e:
             tdLog.info(repr(e))
 
+        tdSql.query("show streams")
+        tdSql.checkRows(2)
+        tdSql.checkData(0, 2, 's1')
+        tdSql.checkData(1, 2, 's0')
+        
+
     def stop(self):
         tdSql.close()
         tdLog.success("%s successfully executed" % __file__)