Add unit test cases

Signed-off-by: Kebo Liu <[email protected]>

Author: keboliu

sonic-xcvrd/tests/test_xcvrd.py

@@ -579,10 +579,14 @@ def test_init_port_sfp_status_tbl(self):
         task = SfpStateUpdateTask(DEFAULT_NAMESPACE, port_mapping, stop_event, sfp_error_event)
         task._init_port_sfp_status_tbl(port_mapping, xcvr_table_helper, stop_event)
 
-    @patch('sonic_py_common.device_info.get_paths_to_platform_and_hwsku_dirs', MagicMock(return_value=('/invalid/path', None)))
+    @patch('sonic_py_common.device_info.get_paths_to_platform_and_hwsku_dirs', MagicMock(return_value=('/invalid/path', '/invalid/path')))
     def test_load_media_settings_missing_file(self):
         assert media_settings_parser.load_media_settings() == {}
 
+    @patch('sonic_py_common.device_info.get_paths_to_platform_and_hwsku_dirs', MagicMock(return_value=('/invalid/path', '/invalid/path')))
+    def test_load_optical_si_settings_missing_file(self):
+        assert optics_si_parser.load_optics_si_settings() == {}
+
     @patch('xcvrd.xcvrd.platform_chassis')
     @patch('xcvrd.xcvrd.is_cmis_api')
     def test_get_media_settings_key(self, mock_is_cmis_api, mock_chassis):
@@ -2446,6 +2450,22 @@ def test_DaemonXcvrd_init_deinit_fastboot_enabled(self):
             xcvrd.init()
             xcvrd.deinit()
 
+    @patch('sonic_py_common.device_info.get_paths_to_platform_and_hwsku_dirs', MagicMock(return_value=(test_path, '/invalid/path')))
+    def test_load_optical_si_file_from_platform_folder(self):
+        assert optics_si_parser.load_optics_si_settings() != {}
+
+    @patch('sonic_py_common.device_info.get_paths_to_platform_and_hwsku_dirs', MagicMock(return_value=('/invalid/path', test_path)))
+    def test_load_optical_si_file_from_hwsku_folder(self):
+        assert optics_si_parser.load_optics_si_settings() != {}
+
+    @patch('sonic_py_common.device_info.get_paths_to_platform_and_hwsku_dirs', MagicMock(return_value=(test_path, '/invalid/path')))
+    def test_load_media_settings_file_from_platform_folder(self):
+        assert media_settings_parser.load_media_settings() != {}
+
+    @patch('sonic_py_common.device_info.get_paths_to_platform_and_hwsku_dirs', MagicMock(return_value=('/invalid/path', test_path)))
+    def test_load_media_settings_file_from_hwsku_folder(self):
+        assert media_settings_parser.load_media_settings() != {}
+
 def wait_until(total_wait_time, interval, call_back, *args, **kwargs):
     wait_time = 0
     while wait_time <= total_wait_time: