Replace cmp in acl_loader with operator.eq (sonic-net#2328)

cmp is deprecated in python3. Use operator.eq instead

Signed-off-by: Zhaohui Sun <zhaohuisun@microsoft.com>

Author: ZhaohuiS

acl_loader/main.py

@@ -4,6 +4,7 @@
 import ipaddress
 import json
 import syslog
+import operator
 
 import openconfig_acl
 import tabulate
@@ -758,7 +759,7 @@ def incremental_update(self):
                 namespace_configdb.mod_entry(self.ACL_RULE, key, None)
 
         for key in existing_controlplane_rules:
-            if cmp(self.rules_info[key], self.rules_db_info[key]) != 0:
+            if not operator.eq(self.rules_info[key], self.rules_db_info[key]):
                 self.configdb.set_entry(self.ACL_RULE, key, self.rules_info[key])
                 # Program for per-asic namespace corresponding to front asic also if present.
                 # For control plane ACL it's not needed but to keep all db in sync program everywhere

tests/acl_input/incremental_1.json

@@ -0,0 +1,32 @@
+{
+    "acl": {
+        "acl-sets": {
+            "acl-set": {
+                "ntp-acl": {
+                    "acl-entries": {
+                        "acl-entry": {
+                            "1": {
+                                "ip": {
+                                    "config": {
+                                        "source-ip-address": "20.0.0.12/32"
+                                    }
+                                }, 
+                                "config": {
+                                    "sequence-id": 1
+                                }, 
+                                "actions": {
+                                    "config": {
+                                        "forwarding-action": "ACCEPT"
+                                    }
+                                }
+                            }
+                        }
+                    }, 
+                    "config": {
+                        "name": "ntp-acl"
+                    }
+                }
+            }
+        }
+    }
+}

tests/acl_input/incremental_2.json

@@ -0,0 +1,32 @@
+{
+    "acl": {
+        "acl-sets": {
+            "acl-set": {
+                "ntp-acl": {
+                    "acl-entries": {
+                        "acl-entry": {
+                            "1": {
+                                "ip": {
+                                    "config": {
+                                        "source-ip-address": "20.0.0.12/32"
+                                    }
+                                }, 
+                                "config": {
+                                    "sequence-id": 1
+                                }, 
+                                "actions": {
+                                    "config": {
+                                        "forwarding-action": "DROP"
+                                    }
+                                }
+                            }
+                        }
+                    }, 
+                    "config": {
+                        "name": "ntp-acl"
+                    }
+                }
+            }
+        }
+    }
+}

tests/acl_loader_test.py

@@ -1,6 +1,7 @@
 import sys
 import os
 import pytest
+from unittest import mock
 
 test_path = os.path.dirname(os.path.abspath(__file__))
 modules_path = os.path.dirname(test_path)
@@ -200,3 +201,19 @@ def test_icmp_fields_with_non_tcp_protocol(self, acl_loader):
         acl_loader.rules_info = {}
         acl_loader.load_rules_from_file(os.path.join(test_path, 'acl_input/tcp_bad_protocol_number.json'))
         assert not acl_loader.rules_info.get("RULE_1")
+
+    def test_incremental_update(self, acl_loader):
+        acl_loader.rules_info = {}
+        acl_loader.tables_db_info['NTP_ACL'] = {
+            "stage": "INGRESS",
+            "type": "CTRLPLANE"
+        }
+        acl_loader.load_rules_from_file(os.path.join(test_path, 'acl_input/incremental_1.json'))
+        acl_loader.rules_db_info = acl_loader.rules_info
+        assert acl_loader.rules_info[(('NTP_ACL', 'RULE_1'))]["PACKET_ACTION"] == "ACCEPT"
+        acl_loader.per_npu_configdb = None
+        acl_loader.configdb.mod_entry = mock.MagicMock(return_value=True)
+        acl_loader.configdb.set_entry = mock.MagicMock(return_value=True)
+        acl_loader.load_rules_from_file(os.path.join(test_path, 'acl_input/incremental_2.json'))
+        acl_loader.incremental_update()
+        assert acl_loader.rules_info[(('NTP_ACL', 'RULE_1'))]["PACKET_ACTION"] == "DROP"