Add UT and improve coverage

Signed-off-by: Vivek Reddy <[email protected]>

tests/show_ip_int_test.py

@@ -1,6 +1,7 @@
 import os
 import pytest
 import subprocess
+from unittest.mock import patch
 from click.testing import CliRunner
 
 import show.main as show
@@ -154,3 +155,14 @@ def test_show_intf_invalid_af_option(self):
         return_code, result = get_result_and_return_code(['ipintutil', '-a', 'ipv5'])
         assert return_code == 1
         assert result == show_error_invalid_af
+
+class TestMultiAsicIpIntUtil(object):
+    def test_masic_get_ip_intf_and_address(self):
+        import utilities_common
+        with patch("utilities_common.multi_asic.netifaces.interfaces") as mocked_object:
+            mocked_object.return_value = ["Ethernet0"]
+            assert utilities_common.multi_asic.multi_asic_get_ip_intf_from_ns('') == ["Ethernet0"]
+        with patch("utilities_common.multi_asic.netifaces.ifaddresses") as mocked_object:
+            mocked_object.return_value = "192.168.1.0/24"
+            assert utilities_common.multi_asic.multi_asic_get_ip_intf_addr_from_ns('', "Ethernet0") == "192.168.1.0/24"
+            mocked_object.assert_called_with("Ethernet0")