python/google/protobuf/internal/message_factory_test.py

#! /usr/bin/env python
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# Protocol Buffers - Google's data interchange format
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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([u'one', u'two', u'three'])
    msg.factory_1_message.list_value.append(u'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([u'four', u'three', u'two'])
    msg.list_value.append(u'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])


if __name__ == '__main__':
  unittest.main()