Use lower_with_under for Python nextgen tests

PiperOrigin-RevId: 635661121

python/google/protobuf/internal/proto_json_test.py

@@ -16,18 +16,19 @@ from google.protobuf.util import json_format_proto3_pb2
 
 class ProtoJsonTest(unittest.TestCase):
 
-  def testSimpleSerialize(self):
+  def test_simple_serialize(self):
     message = json_format_proto3_pb2.TestMessage()
     message.int32_value = 12345
     expected = {'int32Value': 12345}
     self.assertEqual(expected, proto_json.serialize(message))
 
-  def testSimpleParse(self):
+  def test_simple_parse(self):
     expected = 12345
     js_dict = {'int32Value': expected}
     message = proto_json.parse(json_format_proto3_pb2.TestMessage,
                                js_dict)
-    self.assertEqual(expected, message.int32_value)
+    self.assertEqual(expected, message.int32_value)  # pytype: disable=attribute-error
+
 
 if __name__ == "__main__":
   unittest.main()

python/google/protobuf/internal/proto_test.py

@@ -23,12 +23,13 @@ from google.protobuf import unittest_proto3_arena_pb2
 @testing_refleaks.TestCase
 class ProtoTest(unittest.TestCase):
 
-  def testSerializeParse(self, message_module):
+  def test_simple_serialize_parse(self, message_module):
     msg = message_module.TestAllTypes()
     test_util.SetAllFields(msg)
     serialized_data = proto.serialize(msg)
     parsed_msg = proto.parse(message_module.TestAllTypes, serialized_data)
     self.assertEqual(msg, parsed_msg)
 
+
 if __name__ == '__main__':
   unittest.main()