Python google.protobuf.descriptor_pb2.FileDescriptorProto() Examples

def testMakeDescriptorWithUnsignedIntField(self):
    file_descriptor_proto = descriptor_pb2.FileDescriptorProto()
    file_descriptor_proto.name = 'Foo'
    message_type = file_descriptor_proto.message_type.add()
    message_type.name = file_descriptor_proto.name
    enum_type = message_type.enum_type.add()
    enum_type.name = 'FOO'
    enum_type_val = enum_type.value.add()
    enum_type_val.name = 'BAR'
    enum_type_val.number = 3
    field = message_type.field.add()
    field.number = 1
    field.name = 'uint64_field'
    field.label = descriptor.FieldDescriptor.LABEL_REQUIRED
    field.type = descriptor.FieldDescriptor.TYPE_UINT64
    enum_field = message_type.field.add()
    enum_field.number = 2
    enum_field.name = 'bar_field'
    enum_field.label = descriptor.FieldDescriptor.LABEL_REQUIRED
    enum_field.type = descriptor.FieldDescriptor.TYPE_ENUM
    enum_field.type_name = 'Foo.FOO'

    result = descriptor.MakeDescriptor(message_type)
    self.assertEqual(result.fields[0].cpp_type,
                     descriptor.FieldDescriptor.CPPTYPE_UINT64) 

def setUp(self):
    # TODO(jieluo): Should make the pool which is created by
    # serialized_pb same with generated pool.
    # TODO(jieluo): More test coverage for the generated pool.
    self.pool = descriptor_pool.DescriptorPool()
    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)
    self.pool.Add(self.factory_test1_fd)
    self.pool.Add(self.factory_test2_fd)

    self.pool.Add(descriptor_pb2.FileDescriptorProto.FromString(
        unittest_import_public_pb2.DESCRIPTOR.serialized_pb))
    self.pool.Add(descriptor_pb2.FileDescriptorProto.FromString(
        unittest_import_pb2.DESCRIPTOR.serialized_pb))
    self.pool.Add(descriptor_pb2.FileDescriptorProto.FromString(
        unittest_pb2.DESCRIPTOR.serialized_pb)) 

def testParsingFlatClassWithExplicitClassDeclaration(self):
    """Test that the generated class can parse a flat message."""
    # TODO(xiaofeng): This test fails with cpp implemetnation in the call
    # of six.with_metaclass(). The other two callsites of with_metaclass
    # in this file are both excluded from cpp test, so it might be expected
    # to fail. Need someone more familiar with the python code to take a
    # look at this.
    if api_implementation.Type() != 'python':
      return
    file_descriptor = descriptor_pb2.FileDescriptorProto()
    file_descriptor.ParseFromString(self._GetSerializedFileDescriptor('A'))
    msg_descriptor = descriptor.MakeDescriptor(
        file_descriptor.message_type[0])

    class MessageClass(six.with_metaclass(reflection.GeneratedProtocolMessageType, message.Message)):
      DESCRIPTOR = msg_descriptor
    msg = MessageClass()
    msg_str = (
        'flat: 0 '
        'flat: 1 '
        'flat: 2 ')
    text_format.Merge(msg_str, msg)
    self.assertEqual(msg.flat, [0, 1, 2]) 

def testFileDescriptorOptionsWithCustomDescriptorPool(self):
    # Create a descriptor pool, and add a new FileDescriptorProto to it.
    pool = descriptor_pool.DescriptorPool()
    file_name = 'file_descriptor_options_with_custom_descriptor_pool.proto'
    file_descriptor_proto = descriptor_pb2.FileDescriptorProto(name=file_name)
    extension_id = file_options_test_pb2.foo_options
    file_descriptor_proto.options.Extensions[extension_id].foo_name = 'foo'
    pool.Add(file_descriptor_proto)
    # The options set on the FileDescriptorProto should be available in the
    # descriptor even if they contain extensions that cannot be deserialized
    # using the pool.
    file_descriptor = pool.FindFileByName(file_name)
    options = file_descriptor.GetOptions()
    self.assertEqual('foo', options.Extensions[extension_id].foo_name)
    # The object returned by GetOptions() is cached.
    self.assertIs(options, file_descriptor.GetOptions()) 

def testParsingFlatClassWithExplicitClassDeclaration(self):
    """Test that the generated class can parse a flat message."""
    # TODO(xiaofeng): This test fails with cpp implemetnation in the call
    # of six.with_metaclass(). The other two callsites of with_metaclass
    # in this file are both excluded from cpp test, so it might be expected
    # to fail. Need someone more familiar with the python code to take a
    # look at this.
    if api_implementation.Type() != 'python':
      return
    file_descriptor = descriptor_pb2.FileDescriptorProto()
    file_descriptor.ParseFromString(self._GetSerializedFileDescriptor('A'))
    msg_descriptor = descriptor.MakeDescriptor(
        file_descriptor.message_type[0])

    class MessageClass(six.with_metaclass(reflection.GeneratedProtocolMessageType, message.Message)):
      DESCRIPTOR = msg_descriptor
    msg = MessageClass()
    msg_str = (
        'flat: 0 '
        'flat: 1 '
        'flat: 2 ')
    text_format.Merge(msg_str, msg)
    self.assertEqual(msg.flat, [0, 1, 2]) 

def testFileDescriptorOptionsWithCustomDescriptorPool(self):
    # Create a descriptor pool, and add a new FileDescriptorProto to it.
    pool = descriptor_pool.DescriptorPool()
    file_name = 'file_descriptor_options_with_custom_descriptor_pool.proto'
    file_descriptor_proto = descriptor_pb2.FileDescriptorProto(name=file_name)
    extension_id = file_options_test_pb2.foo_options
    file_descriptor_proto.options.Extensions[extension_id].foo_name = 'foo'
    pool.Add(file_descriptor_proto)
    # The options set on the FileDescriptorProto should be available in the
    # descriptor even if they contain extensions that cannot be deserialized
    # using the pool.
    file_descriptor = pool.FindFileByName(file_name)
    options = file_descriptor.GetOptions()
    self.assertEqual('foo', options.Extensions[extension_id].foo_name)
    # The object returned by GetOptions() is cached.
    self.assertIs(options, file_descriptor.GetOptions()) 

def testEnumDefaultValue(self):
    """Test the default value of enums which don't start at zero."""
    def _CheckDefaultValue(file_descriptor):
      default_value = (file_descriptor
                       .message_types_by_name['DescriptorPoolTest1']
                       .fields_by_name['nested_enum']
                       .default_value)
      self.assertEqual(default_value,
                       descriptor_pool_test1_pb2.DescriptorPoolTest1.BETA)
    # First check what the generated descriptor contains.
    _CheckDefaultValue(descriptor_pool_test1_pb2.DESCRIPTOR)
    # Then check the generated pool. Normally this is the same descriptor.
    file_descriptor = symbol_database.Default().pool.FindFileByName(
        'google/protobuf/internal/descriptor_pool_test1.proto')
    self.assertIs(file_descriptor, descriptor_pool_test1_pb2.DESCRIPTOR)
    _CheckDefaultValue(file_descriptor)

    # Then check the dynamic pool and its internal DescriptorDatabase.
    descriptor_proto = descriptor_pb2.FileDescriptorProto.FromString(
        descriptor_pool_test1_pb2.DESCRIPTOR.serialized_pb)
    self.pool.Add(descriptor_proto)
    # And do the same check as above
    file_descriptor = self.pool.FindFileByName(
        'google/protobuf/internal/descriptor_pool_test1.proto')
    _CheckDefaultValue(file_descriptor) 

def testParsingNestedClass(self):
    """Test that the generated class can parse a nested message."""
    file_descriptor = descriptor_pb2.FileDescriptorProto()
    file_descriptor.ParseFromString(self._GetSerializedFileDescriptor('C'))
    msg_descriptor = descriptor.MakeDescriptor(
        file_descriptor.message_type[0])
    msg_class = reflection.MakeClass(msg_descriptor)
    msg = msg_class()
    msg_str = (
        'bar {'
        '  baz {'
        '    deep: 4'
        '  }'
        '}')
    text_format.Merge(msg_str, msg)
    self.assertEqual(msg.bar.baz.deep, 4) 

def testMakeDescriptorWithUnsignedIntField(self):
    file_descriptor_proto = descriptor_pb2.FileDescriptorProto()
    file_descriptor_proto.name = 'Foo'
    message_type = file_descriptor_proto.message_type.add()
    message_type.name = file_descriptor_proto.name
    enum_type = message_type.enum_type.add()
    enum_type.name = 'FOO'
    enum_type_val = enum_type.value.add()
    enum_type_val.name = 'BAR'
    enum_type_val.number = 3
    field = message_type.field.add()
    field.number = 1
    field.name = 'uint64_field'
    field.label = descriptor.FieldDescriptor.LABEL_REQUIRED
    field.type = descriptor.FieldDescriptor.TYPE_UINT64
    enum_field = message_type.field.add()
    enum_field.number = 2
    enum_field.name = 'bar_field'
    enum_field.label = descriptor.FieldDescriptor.LABEL_REQUIRED
    enum_field.type = descriptor.FieldDescriptor.TYPE_ENUM
    enum_field.type_name = 'Foo.FOO'

    result = descriptor.MakeDescriptor(message_type)
    self.assertEqual(result.fields[0].cpp_type,
                     descriptor.FieldDescriptor.CPPTYPE_UINT64) 

def testParsingFlatClassWithExplicitClassDeclaration(self):
    """Test that the generated class can parse a flat message."""
    file_descriptor = descriptor_pb2.FileDescriptorProto()
    file_descriptor.ParseFromString(self._GetSerializedFileDescriptor('A'))
    msg_descriptor = descriptor.MakeDescriptor(
        file_descriptor.message_type[0])

    class MessageClass(message.Message, metaclass=reflection.GeneratedProtocolMessageType):
      DESCRIPTOR = msg_descriptor
    msg = MessageClass()
    msg_str = (
        'flat: 0 '
        'flat: 1 '
        'flat: 2 ')
    text_format.Merge(msg_str, msg)
    self.assertEqual(msg.flat, [0, 1, 2]) 

def testMakeDescriptorWithUnsignedIntField(self):
    file_descriptor_proto = descriptor_pb2.FileDescriptorProto()
    file_descriptor_proto.name = 'Foo'
    message_type = file_descriptor_proto.message_type.add()
    message_type.name = file_descriptor_proto.name
    enum_type = message_type.enum_type.add()
    enum_type.name = 'FOO'
    enum_type_val = enum_type.value.add()
    enum_type_val.name = 'BAR'
    enum_type_val.number = 3
    field = message_type.field.add()
    field.number = 1
    field.name = 'uint64_field'
    field.label = descriptor.FieldDescriptor.LABEL_REQUIRED
    field.type = descriptor.FieldDescriptor.TYPE_UINT64
    enum_field = message_type.field.add()
    enum_field.number = 2
    enum_field.name = 'bar_field'
    enum_field.label = descriptor.FieldDescriptor.LABEL_REQUIRED
    enum_field.type = descriptor.FieldDescriptor.TYPE_ENUM
    enum_field.type_name = 'Foo.FOO'

    result = descriptor.MakeDescriptor(message_type)
    self.assertEqual(result.fields[0].cpp_type,
                     descriptor.FieldDescriptor.CPPTYPE_UINT64) 

def testEnumDefaultValue(self):
    """Test the default value of enums which don't start at zero."""
    def _CheckDefaultValue(file_descriptor):
      default_value = (file_descriptor
                       .message_types_by_name['DescriptorPoolTest1']
                       .fields_by_name['nested_enum']
                       .default_value)
      self.assertEqual(default_value,
                       descriptor_pool_test1_pb2.DescriptorPoolTest1.BETA)
    # First check what the generated descriptor contains.
    _CheckDefaultValue(descriptor_pool_test1_pb2.DESCRIPTOR)
    # Then check the generated pool. Normally this is the same descriptor.
    file_descriptor = symbol_database.Default().pool.FindFileByName(
        'google/protobuf/internal/descriptor_pool_test1.proto')
    self.assertIs(file_descriptor, descriptor_pool_test1_pb2.DESCRIPTOR)
    _CheckDefaultValue(file_descriptor)

    # Then check the dynamic pool and its internal DescriptorDatabase.
    descriptor_proto = descriptor_pb2.FileDescriptorProto.FromString(
        descriptor_pool_test1_pb2.DESCRIPTOR.serialized_pb)
    self.pool.Add(descriptor_proto)
    # And do the same check as above
    file_descriptor = self.pool.FindFileByName(
        'google/protobuf/internal/descriptor_pool_test1.proto')
    _CheckDefaultValue(file_descriptor) 

def _type_names(
    proto_file: FileDescriptorProto,
    message_type: DescriptorProto,
    parents: Optional[Deque[str]] = None,
) -> Iterator[Tuple[str, str]]:
    if parents is None:
        parents = deque()

    proto_name_parts = ['']
    if proto_file.package:
        proto_name_parts.append(proto_file.package)
    proto_name_parts.extend(parents)
    proto_name_parts.append(message_type.name)

    py_name_parts = [_proto2pb2_module_name(proto_file.name)]
    py_name_parts.extend(parents)
    py_name_parts.append(message_type.name)

    yield '.'.join(proto_name_parts), '.'.join(py_name_parts)

    parents.append(message_type.name)
    for nested in message_type.nested_type:
        yield from _type_names(proto_file, nested, parents=parents)
    parents.pop() 

def testFileDescriptorOptionsWithCustomDescriptorPool(self):
    # Create a descriptor pool, and add a new FileDescriptorProto to it.
    pool = descriptor_pool.DescriptorPool()
    file_name = 'file_descriptor_options_with_custom_descriptor_pool.proto'
    file_descriptor_proto = descriptor_pb2.FileDescriptorProto(name=file_name)
    extension_id = file_options_test_pb2.foo_options
    file_descriptor_proto.options.Extensions[extension_id].foo_name = 'foo'
    pool.Add(file_descriptor_proto)
    # The options set on the FileDescriptorProto should be available in the
    # descriptor even if they contain extensions that cannot be deserialized
    # using the pool.
    file_descriptor = pool.FindFileByName(file_name)
    options = file_descriptor.GetOptions()
    self.assertEqual('foo', options.Extensions[extension_id].foo_name)
    # The object returned by GetOptions() is cached.
    self.assertIs(options, file_descriptor.GetOptions()) 

def testMakeDescriptorWithUnsignedIntField(self):
    file_descriptor_proto = descriptor_pb2.FileDescriptorProto()
    file_descriptor_proto.name = 'Foo'
    message_type = file_descriptor_proto.message_type.add()
    message_type.name = file_descriptor_proto.name
    enum_type = message_type.enum_type.add()
    enum_type.name = 'FOO'
    enum_type_val = enum_type.value.add()
    enum_type_val.name = 'BAR'
    enum_type_val.number = 3
    field = message_type.field.add()
    field.number = 1
    field.name = 'uint64_field'
    field.label = descriptor.FieldDescriptor.LABEL_REQUIRED
    field.type = descriptor.FieldDescriptor.TYPE_UINT64
    enum_field = message_type.field.add()
    enum_field.number = 2
    enum_field.name = 'bar_field'
    enum_field.label = descriptor.FieldDescriptor.LABEL_REQUIRED
    enum_field.type = descriptor.FieldDescriptor.TYPE_ENUM
    enum_field.type_name = 'Foo.FOO'

    result = descriptor.MakeDescriptor(message_type)
    self.assertEqual(result.fields[0].cpp_type,
                     descriptor.FieldDescriptor.CPPTYPE_UINT64) 

def testParsingFlatClassWithExplicitClassDeclaration(self):
    """Test that the generated class can parse a flat message."""
    # TODO(xiaofeng): This test fails with cpp implemetnation in the call
    # of six.with_metaclass(). The other two callsites of with_metaclass
    # in this file are both excluded from cpp test, so it might be expected
    # to fail. Need someone more familiar with the python code to take a
    # look at this.
    if api_implementation.Type() != 'python':
      return
    file_descriptor = descriptor_pb2.FileDescriptorProto()
    file_descriptor.ParseFromString(self._GetSerializedFileDescriptor('A'))
    msg_descriptor = descriptor.MakeDescriptor(
        file_descriptor.message_type[0])

    class MessageClass(six.with_metaclass(reflection.GeneratedProtocolMessageType, message.Message)):
      DESCRIPTOR = msg_descriptor
    msg = MessageClass()
    msg_str = (
        'flat: 0 '
        'flat: 1 '
        'flat: 2 ')
    text_format.Merge(msg_str, msg)
    self.assertEqual(msg.flat, [0, 1, 2]) 

def testParsingNestedClass(self):
    """Test that the generated class can parse a nested message."""
    file_descriptor = descriptor_pb2.FileDescriptorProto()
    file_descriptor.ParseFromString(self._GetSerializedFileDescriptor('C'))
    msg_descriptor = descriptor.MakeDescriptor(
        file_descriptor.message_type[0])
    msg_class = reflection.MakeClass(msg_descriptor)
    msg = msg_class()
    msg_str = (
        'bar {'
        '  baz {'
        '    deep: 4'
        '  }'
        '}')
    text_format.Merge(msg_str, msg)
    self.assertEqual(msg.bar.baz.deep, 4) 

def testParsingNestedClass(self):
    """Test that the generated class can parse a nested message."""
    file_descriptor = descriptor_pb2.FileDescriptorProto()
    file_descriptor.ParseFromString(self._GetSerializedFileDescriptor('C'))
    msg_descriptor = descriptor.MakeDescriptor(
        file_descriptor.message_type[0])
    msg_class = reflection.MakeClass(msg_descriptor)
    msg = msg_class()
    msg_str = (
        'bar {'
        '  baz {'
        '    deep: 4'
        '  }'
        '}')
    text_format.Merge(msg_str, msg)
    self.assertEqual(msg.bar.baz.deep, 4) 

def testParsingFlatClassWithExplicitClassDeclaration(self):
    """Test that the generated class can parse a flat message."""
    # TODO(xiaofeng): This test fails with cpp implemetnation in the call
    # of six.with_metaclass(). The other two callsites of with_metaclass
    # in this file are both excluded from cpp test, so it might be expected
    # to fail. Need someone more familiar with the python code to take a
    # look at this.
    if api_implementation.Type() != 'python':
      return
    file_descriptor = descriptor_pb2.FileDescriptorProto()
    file_descriptor.ParseFromString(self._GetSerializedFileDescriptor('A'))
    msg_descriptor = descriptor.MakeDescriptor(
        file_descriptor.message_type[0])

    class MessageClass(six.with_metaclass(reflection.GeneratedProtocolMessageType, message.Message)):
      DESCRIPTOR = msg_descriptor
    msg = MessageClass()
    msg_str = (
        'flat: 0 '
        'flat: 1 '
        'flat: 2 ')
    text_format.Merge(msg_str, msg)
    self.assertEqual(msg.flat, [0, 1, 2]) 

def test_file_by_filename_response(channel):
    r1, r2 = await ServerReflectionStub(channel).ServerReflectionInfo([
        ServerReflectionRequest(
            file_by_filename=DESCRIPTOR.name,
        ),
        ServerReflectionRequest(
            file_by_filename='my/missing.proto',
        ),
    ])

    proto_bytes, = r1.file_descriptor_response.file_descriptor_proto
    dummy_proto = FileDescriptorProto()
    dummy_proto.ParseFromString(proto_bytes)
    assert dummy_proto.name == DESCRIPTOR.name
    assert dummy_proto.package == DESCRIPTOR.package

    assert r2 == ServerReflectionResponse(
        error_response=ErrorResponse(
            error_code=5,
            error_message='not found',
        ),
    ) 

def testParsingNestedClass(self):
    """Test that the generated class can parse a nested message."""
    file_descriptor = descriptor_pb2.FileDescriptorProto()
    file_descriptor.ParseFromString(self._GetSerializedFileDescriptor('C'))
    msg_descriptor = descriptor.MakeDescriptor(
        file_descriptor.message_type[0])
    msg_class = reflection.MakeClass(msg_descriptor)
    msg = msg_class()
    msg_str = (
        'bar {'
        '  baz {'
        '    deep: 4'
        '  }'
        '}')
    text_format.Merge(msg_str, msg)
    self.assertEqual(msg.bar.baz.deep, 4) 

def setUp(self):
    file_proto = descriptor_pb2.FileDescriptorProto(
        name='some/filename/some.proto',
        package='protobuf_unittest')
    message_proto = file_proto.message_type.add(
        name='NestedMessage')
    message_proto.field.add(
        name='bb',
        number=1,
        type=descriptor_pb2.FieldDescriptorProto.TYPE_INT32,
        label=descriptor_pb2.FieldDescriptorProto.LABEL_OPTIONAL)
    enum_proto = message_proto.enum_type.add(
        name='ForeignEnum')
    enum_proto.value.add(name='FOREIGN_FOO', number=4)
    enum_proto.value.add(name='FOREIGN_BAR', number=5)
    enum_proto.value.add(name='FOREIGN_BAZ', number=6)

    descriptor_pool = symbol_database.Default().pool
    descriptor_pool.Add(file_proto)
    self.my_file = descriptor_pool.FindFileByName(file_proto.name)
    self.my_message = self.my_file.message_types_by_name[message_proto.name]
    self.my_enum = self.my_message.enum_types_by_name[enum_proto.name]

    self.my_method = descriptor.MethodDescriptor(
        name='Bar',
        full_name='protobuf_unittest.TestService.Bar',
        index=0,
        containing_service=None,
        input_type=None,
        output_type=None)
    self.my_service = descriptor.ServiceDescriptor(
        name='TestServiceWithOptions',
        full_name='protobuf_unittest.TestServiceWithOptions',
        file=self.my_file,
        index=0,
        methods=[
            self.my_method
        ]) 

def testFileDescriptorErrors(self):
    file_name = 'test_file_descriptor_errors.proto'
    package_name = 'test_file_descriptor_errors.proto'
    file_descriptor_proto = descriptor_pb2.FileDescriptorProto()
    file_descriptor_proto.name = file_name
    file_descriptor_proto.package = package_name
    m1 = file_descriptor_proto.message_type.add()
    m1.name = 'msg1'
    # Compiles the proto into the C++ descriptor pool
    descriptor.FileDescriptor(
        file_name,
        package_name,
        serialized_pb=file_descriptor_proto.SerializeToString())
    # Add a FileDescriptorProto that has duplicate symbols
    another_file_name = 'another_test_file_descriptor_errors.proto'
    file_descriptor_proto.name = another_file_name
    m2 = file_descriptor_proto.message_type.add()
    m2.name = 'msg2'
    with self.assertRaises(TypeError) as cm:
      descriptor.FileDescriptor(
          another_file_name,
          package_name,
          serialized_pb=file_descriptor_proto.SerializeToString())
      self.assertTrue(hasattr(cm, 'exception'), '%s not raised' %
                      getattr(cm.expected, '__name__', cm.expected))
      self.assertIn('test_file_descriptor_errors.proto', str(cm.exception))
      # Error message will say something about this definition being a
      # duplicate, though we don't check the message exactly to avoid a
      # dependency on the C++ logging code.
      self.assertIn('test_file_descriptor_errors.msg1', str(cm.exception)) 

def testCustomDescriptorPool(self):
    # Create a new pool, and add a file descriptor.
    pool = descriptor_pool.DescriptorPool()
    file_desc = descriptor_pb2.FileDescriptorProto(
        name='some/file.proto', package='package')
    file_desc.message_type.add(name='Message')
    pool.Add(file_desc)
    self.assertEqual(pool.FindFileByName('some/file.proto').name,
                     'some/file.proto')
    self.assertEqual(pool.FindMessageTypeByName('package.Message').name,
                     'Message') 

def testAddFileDescriptor(self):
    # pylint: disable=g-import-not-at-top
    from google.protobuf.pyext import _message
    pool = _message.default_pool
    file_desc = descriptor_pb2.FileDescriptorProto(name='some/file.proto')
    pool.Add(file_desc)
    pool.AddSerializedFile(file_desc.SerializeToString()) 

def __init__(self, fd, descriptors):
        # type: (d.FileDescriptorProto, Descriptors) -> None
        self.fd = fd
        self.descriptors = descriptors
        self.lines = []  # type: List[Text]
        self.indent = ""

        # dictionary of x->(y,z) for `from {x} import {y} as {z}`
        self.imports = defaultdict(set)  # type: Dict[Text, Set[Tuple[Text, Text]]]
        self.locals = set()  # type: Set[Text]
        self.builtin_vars = set()  # type: Set[Text]
        self.py2_builtin_vars = set()  # type: Set[Text] 

def CopyToProto(self, proto):
    """Copies this to a descriptor_pb2.FileDescriptorProto.

    Args:
      proto: An empty descriptor_pb2.FileDescriptorProto.
    """
    proto.ParseFromString(self.serialized_pb) 

def __init__(self, request):
        # type: (plugin_pb2.CodeGeneratorRequest) -> None
        files = {f.name: f for f in request.proto_file}
        to_generate = {n: files[n] for n in request.file_to_generate}
        self.files = files  # type: Dict[Text, d.FileDescriptorProto]
        self.to_generate = to_generate  # type: Dict[Text, d.FileDescriptorProto]
        self.messages = {}  # type: Dict[Text, d.DescriptorProto]
        self.message_to_fd = {}  # type: Dict[Text, d.FileDescriptorProto]

        def _add_enums(enums, prefix, _fd):
            # type: (RepeatedCompositeFieldContainer[d.EnumDescriptorProto], Text, d.FileDescriptorProto) -> None
            for enum in enums:
                self.message_to_fd[prefix + enum.name] = _fd
                self.message_to_fd[prefix + enum.name + "Value"] = _fd

        def _add_messages(messages, prefix, _fd):
            # type: (RepeatedCompositeFieldContainer[d.DescriptorProto], Text, d.FileDescriptorProto) -> None
            for message in messages:
                self.messages[prefix + message.name] = message
                self.message_to_fd[prefix + message.name] = _fd
                sub_prefix = prefix + message.name + "."
                _add_messages(message.nested_type, sub_prefix, _fd)
                _add_enums(message.enum_type, sub_prefix, _fd)

        for fd in request.proto_file:
            start_prefix = "." + fd.package + "." if fd.package else "."
            _add_messages(fd.message_type, start_prefix, fd)
            _add_enums(fd.enum_type, start_prefix, fd) 

def testFileDescriptorErrors(self):
    file_name = 'test_file_descriptor_errors.proto'
    package_name = 'test_file_descriptor_errors.proto'
    file_descriptor_proto = descriptor_pb2.FileDescriptorProto()
    file_descriptor_proto.name = file_name
    file_descriptor_proto.package = package_name
    m1 = file_descriptor_proto.message_type.add()
    m1.name = 'msg1'
    # Compiles the proto into the C++ descriptor pool
    descriptor.FileDescriptor(
        file_name,
        package_name,
        serialized_pb=file_descriptor_proto.SerializeToString())
    # Add a FileDescriptorProto that has duplicate symbols
    another_file_name = 'another_test_file_descriptor_errors.proto'
    file_descriptor_proto.name = another_file_name
    m2 = file_descriptor_proto.message_type.add()
    m2.name = 'msg2'
    with self.assertRaises(TypeError) as cm:
      descriptor.FileDescriptor(
          another_file_name,
          package_name,
          serialized_pb=file_descriptor_proto.SerializeToString())
      self.assertTrue(hasattr(cm, 'exception'), '%s not raised' %
                      getattr(cm.expected, '__name__', cm.expected))
      self.assertIn('test_file_descriptor_errors.proto', str(cm.exception))
      # Error message will say something about this definition being a
      # duplicate, though we don't check the message exactly to avoid a
      # dependency on the C++ logging code.
      self.assertIn('test_file_descriptor_errors.msg1', str(cm.exception)) 

def testMakeDescriptorWithNestedFields(self):
    file_descriptor_proto = descriptor_pb2.FileDescriptorProto()
    file_descriptor_proto.name = 'Foo2'
    message_type = file_descriptor_proto.message_type.add()
    message_type.name = file_descriptor_proto.name
    nested_type = message_type.nested_type.add()
    nested_type.name = 'Sub'
    enum_type = nested_type.enum_type.add()
    enum_type.name = 'FOO'
    enum_type_val = enum_type.value.add()
    enum_type_val.name = 'BAR'
    enum_type_val.number = 3
    field = message_type.field.add()
    field.number = 1
    field.name = 'uint64_field'
    field.label = descriptor.FieldDescriptor.LABEL_REQUIRED
    field.type = descriptor.FieldDescriptor.TYPE_UINT64
    field = message_type.field.add()
    field.number = 2
    field.name = 'nested_message_field'
    field.label = descriptor.FieldDescriptor.LABEL_REQUIRED
    field.type = descriptor.FieldDescriptor.TYPE_MESSAGE
    field.type_name = 'Sub'
    enum_field = nested_type.field.add()
    enum_field.number = 2
    enum_field.name = 'bar_field'
    enum_field.label = descriptor.FieldDescriptor.LABEL_REQUIRED
    enum_field.type = descriptor.FieldDescriptor.TYPE_ENUM
    enum_field.type_name = 'Foo2.Sub.FOO'

    result = descriptor.MakeDescriptor(message_type)
    self.assertEqual(result.fields[0].cpp_type,
                     descriptor.FieldDescriptor.CPPTYPE_UINT64)
    self.assertEqual(result.fields[1].cpp_type,
                     descriptor.FieldDescriptor.CPPTYPE_MESSAGE)
    self.assertEqual(result.fields[1].message_type.containing_type,
                     result)
    self.assertEqual(result.nested_types[0].fields[0].full_name,
                     'Foo2.Sub.bar_field')
    self.assertEqual(result.nested_types[0].fields[0].enum_type,
                     result.nested_types[0].enum_types[0])