Adding is_copper api to cmis

Author: bobbymcgonigle

sonic_platform_base/sonic_xcvr/api/public/cmis.py

@@ -524,6 +524,13 @@ def get_voltage(self):
             return None
         return float("{:.3f}".format(voltage))
 
+    def is_copper(self):
+        '''
+        Returns True if the module is copper, False otherwise
+        '''
+        media_intf = self.get_module_media_type()
+        return media_intf == "passive_copper_media_interface" if media_intf else None
+
     def is_flat_memory(self):
         return self.xcvr_eeprom.read(consts.FLAT_MEM_FIELD) is not False
 

tests/sonic_xcvr/test_cmis.py

@@ -169,6 +169,19 @@ def test_get_voltage(self, mock_response, expected):
         result = self.api.get_voltage()
         assert result == expected
 
+    def test_is_copper(self):
+      with patch.object(self.api, 'xcvr_eeprom') as mock_eeprom:
+         mock_eeprom.read = MagicMock()
+         mock_eeprom.read.return_value = None
+         assert self.api.is_copper() is None
+         self.api.get_module_media_type = MagicMock()
+         self.api.get_module_media_type.return_value = "passive_copper_media_interface"
+         assert self.api.is_copper()
+         self.api.get_module_media_type.return_value = "active_cable_media_interface"
+         assert not self.api.is_copper()
+         self.api.get_module_media_type.return_value = "sm_media_interface"
+         assert not self.api.is_copper()
+
     @pytest.mark.parametrize("mock_response, expected", [
         (False, False)
     ])