text: #! /usr/bin/env python
  #
  # Protocol Buffers - Google's data interchange format
  # Copyright 2008 Google Inc.  All rights reserved.
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  """Tests for google.protobuf.message_factory."""
  
  __author__ = 'matthewtoia@google.com (Matt Toia)'
  
  try:
    import unittest2 as unittest  #PY26
  except ImportError:
    import unittest
  
  from google.protobuf import descriptor_pb2
  from google.protobuf.internal import factory_test1_pb2
  from google.protobuf.internal import factory_test2_pb2
  from google.protobuf import descriptor_database
  from google.protobuf import descriptor_pool
  from google.protobuf import message_factory
  
  
  class MessageFactoryTest(unittest.TestCase):
  
    def setUp(self):
      self.factory_test1_fd = descriptor_pb2.FileDescriptorProto.FromString(
          factory_test1_pb2.DESCRIPTOR.serialized_pb)
      self.factory_test2_fd = descriptor_pb2.FileDescriptorProto.FromString(
          factory_test2_pb2.DESCRIPTOR.serialized_pb)
  
    def _ExerciseDynamicClass(self, cls):
      msg = cls()
      msg.mandatory = 42
      msg.nested_factory_2_enum = 0
      msg.nested_factory_2_message.value = 'nested message value'
      msg.factory_1_message.factory_1_enum = 1
      msg.factory_1_message.nested_factory_1_enum = 0
      msg.factory_1_message.nested_factory_1_message.value = (
          'nested message value')
      msg.factory_1_message.scalar_value = 22
      msg.factory_1_message.list_value.extend(['one', 'two', 'three'])
      msg.factory_1_message.list_value.append('four')
      msg.factory_1_enum = 1
      msg.nested_factory_1_enum = 0
      msg.nested_factory_1_message.value = 'nested message value'
      msg.circular_message.mandatory = 1
      msg.circular_message.circular_message.mandatory = 2
      msg.circular_message.scalar_value = 'one deep'
      msg.scalar_value = 'zero deep'
      msg.list_value.extend(['four', 'three', 'two'])
      msg.list_value.append('one')
      msg.grouped.add()
      msg.grouped[0].part_1 = 'hello'
      msg.grouped[0].part_2 = 'world'
      msg.grouped.add(part_1='testing', part_2='123')
      msg.loop.loop.mandatory = 2
      msg.loop.loop.loop.loop.mandatory = 4
      serialized = msg.SerializeToString()
      converted = factory_test2_pb2.Factory2Message.FromString(serialized)
      reserialized = converted.SerializeToString()
      self.assertEqual(serialized, reserialized)
      result = cls.FromString(reserialized)
      self.assertEqual(msg, result)
  
    def testGetPrototype(self):
      db = descriptor_database.DescriptorDatabase()
      pool = descriptor_pool.DescriptorPool(db)
      db.Add(self.factory_test1_fd)
      db.Add(self.factory_test2_fd)
      factory = message_factory.MessageFactory()
      cls = factory.GetPrototype(pool.FindMessageTypeByName(
          'google.protobuf.python.internal.Factory2Message'))
      self.assertFalse(cls is factory_test2_pb2.Factory2Message)
      self._ExerciseDynamicClass(cls)
      cls2 = factory.GetPrototype(pool.FindMessageTypeByName(
          'google.protobuf.python.internal.Factory2Message'))
      self.assertTrue(cls is cls2)
  
    def testGetMessages(self):
      # performed twice because multiple calls with the same input must be allowed
      for _ in range(2):
        messages = message_factory.GetMessages([self.factory_test1_fd,
                                                self.factory_test2_fd])
        self.assertTrue(
            set(['google.protobuf.python.internal.Factory2Message',
                 'google.protobuf.python.internal.Factory1Message'],
               ).issubset(set(messages.keys())))
        self._ExerciseDynamicClass(
            messages['google.protobuf.python.internal.Factory2Message'])
        self.assertTrue(
            set(['google.protobuf.python.internal.Factory2Message.one_more_field',
                 'google.protobuf.python.internal.another_field'],
               ).issubset(
                   set(messages['google.protobuf.python.internal.Factory1Message']
                       ._extensions_by_name.keys())))
        factory_msg1 = messages['google.protobuf.python.internal.Factory1Message']
        msg1 = messages['google.protobuf.python.internal.Factory1Message']()
        ext1 = factory_msg1._extensions_by_name[
            'google.protobuf.python.internal.Factory2Message.one_more_field']
        ext2 = factory_msg1._extensions_by_name[
            'google.protobuf.python.internal.another_field']
        msg1.Extensions[ext1] = 'test1'
        msg1.Extensions[ext2] = 'test2'
        self.assertEqual('test1', msg1.Extensions[ext1])
        self.assertEqual('test2', msg1.Extensions[ext2])
  
    def testDuplicateExtensionNumber(self):
      pool = descriptor_pool.DescriptorPool()
      factory = message_factory.MessageFactory(pool=pool)
  
      # Add Container message.
      f = descriptor_pb2.FileDescriptorProto()
      f.name = 'google/protobuf/internal/container.proto'
      f.package = 'google.protobuf.python.internal'
      msg = f.message_type.add()
      msg.name = 'Container'
      rng = msg.extension_range.add()
      rng.start = 1
      rng.end = 10
      pool.Add(f)
      msgs = factory.GetMessages([f.name])
      self.assertIn('google.protobuf.python.internal.Container', msgs)
  
      # Extend container.
      f = descriptor_pb2.FileDescriptorProto()
      f.name = 'google/protobuf/internal/extension.proto'
      f.package = 'google.protobuf.python.internal'
      f.dependency.append('google/protobuf/internal/container.proto')
      msg = f.message_type.add()
      msg.name = 'Extension'
      ext = msg.extension.add()
      ext.name = 'extension_field'
      ext.number = 2
      ext.label = descriptor_pb2.FieldDescriptorProto.LABEL_OPTIONAL
      ext.type_name = 'Extension'
      ext.extendee = 'Container'
      pool.Add(f)
      msgs = factory.GetMessages([f.name])
      self.assertIn('google.protobuf.python.internal.Extension', msgs)
  
      # Add Duplicate extending the same field number.
      f = descriptor_pb2.FileDescriptorProto()
      f.name = 'google/protobuf/internal/duplicate.proto'
      f.package = 'google.protobuf.python.internal'
      f.dependency.append('google/protobuf/internal/container.proto')
      msg = f.message_type.add()
      msg.name = 'Duplicate'
      ext = msg.extension.add()
      ext.name = 'extension_field'
      ext.number = 2
      ext.label = descriptor_pb2.FieldDescriptorProto.LABEL_OPTIONAL
      ext.type_name = 'Duplicate'
      ext.extendee = 'Container'
      pool.Add(f)
  
      with self.assertRaises(Exception) as cm:
        factory.GetMessages([f.name])
  
      self.assertIsInstance(cm.exception, (AssertionError, ValueError))
  
  
  if __name__ == '__main__':
    unittest.main()
  