fix: Use warning instead of warn in system tests to avoid DeprecationWarning (#821)

* fix: Use warning instead of warn in system tests to avoid
DeprecationWarning

* Removed ignore like from pytest.ini

Author: gkevinzheng

pytest.ini

@@ -17,7 +17,5 @@ filterwarnings =
     ignore:datetime.datetime.utcfromtimestamp\(\) is deprecated:DeprecationWarning:google.cloud.logging_v2.handlers.transports
     ignore:datetime.datetime.utcnow\(\) is deprecated:DeprecationWarning:tests.unit.test__http
     ignore:datetime.datetime.utcnow\(\) is deprecated:DeprecationWarning:tests.unit.test_entries
-    # Remove once https://github.com/googleapis/python-logging/issues/820 is fixed
-    ignore:.*warn.*is deprecated, use.*warning.*instead:DeprecationWarning
     # Remove once a version of grpcio newer than 1.59.3 is released to PyPI
     ignore:datetime.datetime.utcnow\(\) is deprecated:DeprecationWarning:grpc._channel

tests/system/test_system.py

@@ -605,7 +605,7 @@ def test_handlers_w_extras(self):
             "resource": Resource(type="cloudiot_device", labels={}),
             "labels": {"test-label": "manual"},
         }
-        cloud_logger.warn(LOG_MESSAGE, extra=extra)
+        cloud_logger.warning(LOG_MESSAGE, extra=extra)
 
         entries = _list_entries(logger)
         self.assertEqual(len(entries), 1)
@@ -634,7 +634,7 @@ def test_handlers_w_json_fields(self):
         cloud_logger = logging.getLogger(LOGGER_NAME)
         cloud_logger.addHandler(handler)
         extra = {"json_fields": {"hello": "world", "two": 2}}
-        cloud_logger.warn(LOG_MESSAGE, extra=extra)
+        cloud_logger.warning(LOG_MESSAGE, extra=extra)
 
         entries = _list_entries(logger)
         self.assertEqual(len(entries), 1)