Update third_party/protobuf to protobuf-v3.0.0-beta-3

third_party/protobuf/python/google/protobuf/internal/unknown_fields_test.py

 #! /usr/bin/env python
 # -*- coding: utf-8 -*-
 #
 # Protocol Buffers - Google's data interchange format
 # Copyright 2008 Google Inc.  All rights reserved.
 # https://developers.google.com/protocol-buffers/
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
@@ skipping 18 matching lines @@
 # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 # THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 """Test for preservation of unknown fields in the pure Python implementation."""
 
 __author__ = 'bohdank@google.com (Bohdan Koval)'
 
 try:
-  import unittest2 as unittest
+  import unittest2 as unittest  #PY26
 except ImportError:
   import unittest
 from google.protobuf import unittest_mset_pb2
 from google.protobuf import unittest_pb2
 from google.protobuf import unittest_proto3_arena_pb2
 from google.protobuf.internal import api_implementation
 from google.protobuf.internal import encoder
 from google.protobuf.internal import message_set_extensions_pb2
 from google.protobuf.internal import missing_enum_values_pb2
 from google.protobuf.internal import test_util
@@ skipping 62 matching lines @@
 
   def testEquals(self):
     message = unittest_pb2.TestEmptyMessage()
     message.ParseFromString(self.all_fields_data)
     self.assertEqual(self.empty_message, message)
 
     self.all_fields.ClearField('optional_string')
     message.ParseFromString(self.all_fields.SerializeToString())
     self.assertNotEqual(self.empty_message, message)
 
+  def testDiscardUnknownFields(self):
+    self.empty_message.DiscardUnknownFields()
+    self.assertEqual(b'', self.empty_message.SerializeToString())
+    # Test message field and repeated message field.
+    message = unittest_pb2.TestAllTypes()
+    other_message = unittest_pb2.TestAllTypes()
+    other_message.optional_string = 'discard'
+    message.optional_nested_message.ParseFromString(
+        other_message.SerializeToString())
+    message.repeated_nested_message.add().ParseFromString(
+        other_message.SerializeToString())
+    self.assertNotEqual(
+        b'', message.optional_nested_message.SerializeToString())
+    self.assertNotEqual(
+        b'', message.repeated_nested_message[0].SerializeToString())
+    message.DiscardUnknownFields()
+    self.assertEqual(b'', message.optional_nested_message.SerializeToString())
+    self.assertEqual(
+        b'', message.repeated_nested_message[0].SerializeToString())
+
 
 class UnknownFieldsAccessorsTest(unittest.TestCase):
 
   def setUp(self):
     self.descriptor = unittest_pb2.TestAllTypes.DESCRIPTOR
     self.all_fields = unittest_pb2.TestAllTypes()
     test_util.SetAllFields(self.all_fields)
     self.all_fields_data = self.all_fields.SerializeToString()
     self.empty_message = unittest_pb2.TestEmptyMessage()
     self.empty_message.ParseFromString(self.all_fields_data)
@@ skipping 159 matching lines @@
     self.assertEqual(self.message.packed_nested_enum, value)
 
   def testRoundTrip(self):
     new_message = missing_enum_values_pb2.TestEnumValues()
     new_message.ParseFromString(self.missing_message.SerializeToString())
     self.assertEqual(self.message, new_message)
 
 
 if __name__ == '__main__':
   unittest.main()