Test divide by zero processing path (#2028)

*Test divide by zero processing path. Add vs test coverage for #1569
Signed-off-by: Wenda Ni <wonda.ni@gmail.com>

tests/test_crm.py

@@ -625,10 +625,26 @@ def test_CrmAcl(self, dvs, testlog):
 
  old_table_used_counter = getCrmCounterValue(dvs, 'ACL_STATS:INGRESS:PORT', 'crm_stats_acl_table_used')
 
+ value = {
+ "count": 1,
+ "list": [
+ {
+ "stage": "SAI_ACL_STAGE_INGRESS",
+ "bind_point": "SAI_ACL_BIND_POINT_TYPE_PORT",
+ "avail_num": "4294967295"
+ }
+ ]
+ }
+ dvs.setReadOnlyAttr('SAI_OBJECT_TYPE_SWITCH', 'SAI_SWITCH_ATTR_AVAILABLE_ACL_TABLE', json.dumps(value))
+ time.sleep(2)
+
+ marker = dvs.add_log_marker()
  # create ACL table
  ttbl = swsscommon.Table(db, "ACL_TABLE")
  fvs = swsscommon.FieldValuePairs([("policy_desc", "test"), ("type", "L3"), ("ports", ",".join(bind_ports))])
  ttbl.set("test", fvs)
+ time.sleep(2)
+ check_syslog(dvs, marker, "ACL_TABLE Exception occurred (div by Zero)", 1)
 
  # create ACL rule
  rtbl = swsscommon.Table(db, "ACL_RULE")