python类HasField()的实例源码

def ensureNestedMessageExists(self, msg, attribute):
    """Make sure that a nested message object exists.

    As soon as a nested message attribute is accessed, it will be present in the
    _fields dict, without being marked as actually being set.
    """
    getattr(msg, attribute)
    self.assertFalse(msg.HasField(attribute))

def testOneofDefaultValues(self, message_module):
    m = message_module.TestAllTypes()
    self.assertIs(None, m.WhichOneof('oneof_field'))
    self.assertFalse(m.HasField('oneof_uint32'))

    # Oneof is set even when setting it to a default value.
    m.oneof_uint32 = 0
    self.assertEqual('oneof_uint32', m.WhichOneof('oneof_field'))
    self.assertTrue(m.HasField('oneof_uint32'))
    self.assertFalse(m.HasField('oneof_string'))

    m.oneof_string = ""
    self.assertEqual('oneof_string', m.WhichOneof('oneof_field'))
    self.assertTrue(m.HasField('oneof_string'))
    self.assertFalse(m.HasField('oneof_uint32'))

def testOneofSemantics(self, message_module):
    m = message_module.TestAllTypes()
    self.assertIs(None, m.WhichOneof('oneof_field'))

    m.oneof_uint32 = 11
    self.assertEqual('oneof_uint32', m.WhichOneof('oneof_field'))
    self.assertTrue(m.HasField('oneof_uint32'))

    m.oneof_string = u'foo'
    self.assertEqual('oneof_string', m.WhichOneof('oneof_field'))
    self.assertFalse(m.HasField('oneof_uint32'))
    self.assertTrue(m.HasField('oneof_string'))

    # Read nested message accessor without accessing submessage.
    m.oneof_nested_message
    self.assertEqual('oneof_string', m.WhichOneof('oneof_field'))
    self.assertTrue(m.HasField('oneof_string'))
    self.assertFalse(m.HasField('oneof_nested_message'))

    # Read accessor of nested message without accessing submessage.
    m.oneof_nested_message.bb
    self.assertEqual('oneof_string', m.WhichOneof('oneof_field'))
    self.assertTrue(m.HasField('oneof_string'))
    self.assertFalse(m.HasField('oneof_nested_message'))

    m.oneof_nested_message.bb = 11
    self.assertEqual('oneof_nested_message', m.WhichOneof('oneof_field'))
    self.assertFalse(m.HasField('oneof_string'))
    self.assertTrue(m.HasField('oneof_nested_message'))

    m.oneof_bytes = b'bb'
    self.assertEqual('oneof_bytes', m.WhichOneof('oneof_field'))
    self.assertFalse(m.HasField('oneof_nested_message'))
    self.assertTrue(m.HasField('oneof_bytes'))

def testOneofClearField(self, message_module):
    m = message_module.TestAllTypes()
    m.oneof_uint32 = 11
    m.ClearField('oneof_field')
    if message_module is unittest_pb2:
      self.assertFalse(m.HasField('oneof_field'))
    self.assertFalse(m.HasField('oneof_uint32'))
    self.assertIs(None, m.WhichOneof('oneof_field'))

def testOneofClearUnsetField(self, message_module):
    m = message_module.TestAllTypes()
    m.oneof_uint32 = 11
    self.ensureNestedMessageExists(m, 'oneof_nested_message')
    m.ClearField('oneof_nested_message')
    self.assertEqual(11, m.oneof_uint32)
    if message_module is unittest_pb2:
      self.assertTrue(m.HasField('oneof_field'))
    self.assertTrue(m.HasField('oneof_uint32'))
    self.assertEqual('oneof_uint32', m.WhichOneof('oneof_field'))

def testHasFieldOnRepeatedField(self, message_module):
    """Using HasField on a repeated field should raise an exception.
    """
    m = message_module.TestAllTypes()
    with self.assertRaises(ValueError) as _:
      m.HasField('repeated_int32')

def testFieldPresence(self):
    message = unittest_pb2.TestAllTypes()

    self.assertFalse(message.HasField("optional_int32"))
    self.assertFalse(message.HasField("optional_bool"))
    self.assertFalse(message.HasField("optional_nested_message"))

    with self.assertRaises(ValueError):
      message.HasField("field_doesnt_exist")

    with self.assertRaises(ValueError):
      message.HasField("repeated_int32")
    with self.assertRaises(ValueError):
      message.HasField("repeated_nested_message")

    self.assertEqual(0, message.optional_int32)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

    # Fields are set even when setting the values to default values.
    message.optional_int32 = 0
    message.optional_bool = False
    message.optional_nested_message.bb = 0
    self.assertTrue(message.HasField("optional_int32"))
    self.assertTrue(message.HasField("optional_bool"))
    self.assertTrue(message.HasField("optional_nested_message"))

    # Set the fields to non-default values.
    message.optional_int32 = 5
    message.optional_bool = True
    message.optional_nested_message.bb = 15

    self.assertTrue(message.HasField("optional_int32"))
    self.assertTrue(message.HasField("optional_bool"))
    self.assertTrue(message.HasField("optional_nested_message"))

    # Clearing the fields unsets them and resets their value to default.
    message.ClearField("optional_int32")
    message.ClearField("optional_bool")
    message.ClearField("optional_nested_message")

    self.assertFalse(message.HasField("optional_int32"))
    self.assertFalse(message.HasField("optional_bool"))
    self.assertFalse(message.HasField("optional_nested_message"))
    self.assertEqual(0, message.optional_int32)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

  # TODO(tibell): The C++ implementations actually allows assignment
  # of unknown enum values to *scalar* fields (but not repeated
  # fields). Once checked enum fields becomes the default in the
  # Python implementation, the C++ implementation should follow suit.

def testFieldPresence(self):
    message = unittest_proto3_arena_pb2.TestAllTypes()

    # We can't test presence of non-repeated, non-submessage fields.
    with self.assertRaises(ValueError):
      message.HasField('optional_int32')
    with self.assertRaises(ValueError):
      message.HasField('optional_float')
    with self.assertRaises(ValueError):
      message.HasField('optional_string')
    with self.assertRaises(ValueError):
      message.HasField('optional_bool')

    # But we can still test presence of submessage fields.
    self.assertFalse(message.HasField('optional_nested_message'))

    # As with proto2, we can't test presence of fields that don't exist, or
    # repeated fields.
    with self.assertRaises(ValueError):
      message.HasField('field_doesnt_exist')

    with self.assertRaises(ValueError):
      message.HasField('repeated_int32')
    with self.assertRaises(ValueError):
      message.HasField('repeated_nested_message')

    # Fields should default to their type-specific default.
    self.assertEqual(0, message.optional_int32)
    self.assertEqual(0, message.optional_float)
    self.assertEqual('', message.optional_string)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

    # Setting a submessage should still return proper presence information.
    message.optional_nested_message.bb = 0
    self.assertTrue(message.HasField('optional_nested_message'))

    # Set the fields to non-default values.
    message.optional_int32 = 5
    message.optional_float = 1.1
    message.optional_string = 'abc'
    message.optional_bool = True
    message.optional_nested_message.bb = 15

    # Clearing the fields unsets them and resets their value to default.
    message.ClearField('optional_int32')
    message.ClearField('optional_float')
    message.ClearField('optional_string')
    message.ClearField('optional_bool')
    message.ClearField('optional_nested_message')

    self.assertEqual(0, message.optional_int32)
    self.assertEqual(0, message.optional_float)
    self.assertEqual('', message.optional_string)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

def testMergeFrom(self):
    msg = map_unittest_pb2.TestMap()
    msg.map_int32_int32[12] = 34
    msg.map_int32_int32[56] = 78
    msg.map_int64_int64[22] = 33
    msg.map_int32_foreign_message[111].c = 5
    msg.map_int32_foreign_message[222].c = 10

    msg2 = map_unittest_pb2.TestMap()
    msg2.map_int32_int32[12] = 55
    msg2.map_int64_int64[88] = 99
    msg2.map_int32_foreign_message[222].c = 15
    msg2.map_int32_foreign_message[222].d = 20
    old_map_value = msg2.map_int32_foreign_message[222]

    msg2.MergeFrom(msg)

    self.assertEqual(34, msg2.map_int32_int32[12])
    self.assertEqual(78, msg2.map_int32_int32[56])
    self.assertEqual(33, msg2.map_int64_int64[22])
    self.assertEqual(99, msg2.map_int64_int64[88])
    self.assertEqual(5, msg2.map_int32_foreign_message[111].c)
    self.assertEqual(10, msg2.map_int32_foreign_message[222].c)
    self.assertFalse(msg2.map_int32_foreign_message[222].HasField('d'))
    self.assertEqual(15, old_map_value.c)

    # Verify that there is only one entry per key, even though the MergeFrom
    # may have internally created multiple entries for a single key in the
    # list representation.
    as_dict = {}
    for key in msg2.map_int32_foreign_message:
      self.assertFalse(key in as_dict)
      as_dict[key] = msg2.map_int32_foreign_message[key].c

    self.assertEqual({111: 5, 222: 10}, as_dict)

    # Special case: test that delete of item really removes the item, even if
    # there might have physically been duplicate keys due to the previous merge.
    # This is only a special case for the C++ implementation which stores the
    # map as an array.
    del msg2.map_int32_int32[12]
    self.assertFalse(12 in msg2.map_int32_int32)

    del msg2.map_int32_foreign_message[222]
    self.assertFalse(222 in msg2.map_int32_foreign_message)

def testFieldPresence(self):
    message = unittest_pb2.TestAllTypes()

    self.assertFalse(message.HasField("optional_int32"))
    self.assertFalse(message.HasField("optional_bool"))
    self.assertFalse(message.HasField("optional_nested_message"))

    with self.assertRaises(ValueError):
      message.HasField("field_doesnt_exist")

    with self.assertRaises(ValueError):
      message.HasField("repeated_int32")
    with self.assertRaises(ValueError):
      message.HasField("repeated_nested_message")

    self.assertEqual(0, message.optional_int32)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

    # Fields are set even when setting the values to default values.
    message.optional_int32 = 0
    message.optional_bool = False
    message.optional_nested_message.bb = 0
    self.assertTrue(message.HasField("optional_int32"))
    self.assertTrue(message.HasField("optional_bool"))
    self.assertTrue(message.HasField("optional_nested_message"))

    # Set the fields to non-default values.
    message.optional_int32 = 5
    message.optional_bool = True
    message.optional_nested_message.bb = 15

    self.assertTrue(message.HasField("optional_int32"))
    self.assertTrue(message.HasField("optional_bool"))
    self.assertTrue(message.HasField("optional_nested_message"))

    # Clearing the fields unsets them and resets their value to default.
    message.ClearField("optional_int32")
    message.ClearField("optional_bool")
    message.ClearField("optional_nested_message")

    self.assertFalse(message.HasField("optional_int32"))
    self.assertFalse(message.HasField("optional_bool"))
    self.assertFalse(message.HasField("optional_nested_message"))
    self.assertEqual(0, message.optional_int32)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

  # TODO(tibell): The C++ implementations actually allows assignment
  # of unknown enum values to *scalar* fields (but not repeated
  # fields). Once checked enum fields becomes the default in the
  # Python implementation, the C++ implementation should follow suit.

def testFieldPresence(self):
    message = unittest_proto3_arena_pb2.TestAllTypes()

    # We can't test presence of non-repeated, non-submessage fields.
    with self.assertRaises(ValueError):
      message.HasField('optional_int32')
    with self.assertRaises(ValueError):
      message.HasField('optional_float')
    with self.assertRaises(ValueError):
      message.HasField('optional_string')
    with self.assertRaises(ValueError):
      message.HasField('optional_bool')

    # But we can still test presence of submessage fields.
    self.assertFalse(message.HasField('optional_nested_message'))

    # As with proto2, we can't test presence of fields that don't exist, or
    # repeated fields.
    with self.assertRaises(ValueError):
      message.HasField('field_doesnt_exist')

    with self.assertRaises(ValueError):
      message.HasField('repeated_int32')
    with self.assertRaises(ValueError):
      message.HasField('repeated_nested_message')

    # Fields should default to their type-specific default.
    self.assertEqual(0, message.optional_int32)
    self.assertEqual(0, message.optional_float)
    self.assertEqual('', message.optional_string)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

    # Setting a submessage should still return proper presence information.
    message.optional_nested_message.bb = 0
    self.assertTrue(message.HasField('optional_nested_message'))

    # Set the fields to non-default values.
    message.optional_int32 = 5
    message.optional_float = 1.1
    message.optional_string = 'abc'
    message.optional_bool = True
    message.optional_nested_message.bb = 15

    # Clearing the fields unsets them and resets their value to default.
    message.ClearField('optional_int32')
    message.ClearField('optional_float')
    message.ClearField('optional_string')
    message.ClearField('optional_bool')
    message.ClearField('optional_nested_message')

    self.assertEqual(0, message.optional_int32)
    self.assertEqual(0, message.optional_float)
    self.assertEqual('', message.optional_string)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

def testFieldPresence(self):
    message = unittest_pb2.TestAllTypes()

    self.assertFalse(message.HasField("optional_int32"))
    self.assertFalse(message.HasField("optional_bool"))
    self.assertFalse(message.HasField("optional_nested_message"))

    with self.assertRaises(ValueError):
      message.HasField("field_doesnt_exist")

    with self.assertRaises(ValueError):
      message.HasField("repeated_int32")
    with self.assertRaises(ValueError):
      message.HasField("repeated_nested_message")

    self.assertEqual(0, message.optional_int32)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

    # Fields are set even when setting the values to default values.
    message.optional_int32 = 0
    message.optional_bool = False
    message.optional_nested_message.bb = 0
    self.assertTrue(message.HasField("optional_int32"))
    self.assertTrue(message.HasField("optional_bool"))
    self.assertTrue(message.HasField("optional_nested_message"))

    # Set the fields to non-default values.
    message.optional_int32 = 5
    message.optional_bool = True
    message.optional_nested_message.bb = 15

    self.assertTrue(message.HasField("optional_int32"))
    self.assertTrue(message.HasField("optional_bool"))
    self.assertTrue(message.HasField("optional_nested_message"))

    # Clearing the fields unsets them and resets their value to default.
    message.ClearField("optional_int32")
    message.ClearField("optional_bool")
    message.ClearField("optional_nested_message")

    self.assertFalse(message.HasField("optional_int32"))
    self.assertFalse(message.HasField("optional_bool"))
    self.assertFalse(message.HasField("optional_nested_message"))
    self.assertEqual(0, message.optional_int32)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

  # TODO(tibell): The C++ implementations actually allows assignment
  # of unknown enum values to *scalar* fields (but not repeated
  # fields). Once checked enum fields becomes the default in the
  # Python implementation, the C++ implementation should follow suit.

def testFieldPresence(self):
    message = unittest_proto3_arena_pb2.TestAllTypes()

    # We can't test presence of non-repeated, non-submessage fields.
    with self.assertRaises(ValueError):
      message.HasField('optional_int32')
    with self.assertRaises(ValueError):
      message.HasField('optional_float')
    with self.assertRaises(ValueError):
      message.HasField('optional_string')
    with self.assertRaises(ValueError):
      message.HasField('optional_bool')

    # But we can still test presence of submessage fields.
    self.assertFalse(message.HasField('optional_nested_message'))

    # As with proto2, we can't test presence of fields that don't exist, or
    # repeated fields.
    with self.assertRaises(ValueError):
      message.HasField('field_doesnt_exist')

    with self.assertRaises(ValueError):
      message.HasField('repeated_int32')
    with self.assertRaises(ValueError):
      message.HasField('repeated_nested_message')

    # Fields should default to their type-specific default.
    self.assertEqual(0, message.optional_int32)
    self.assertEqual(0, message.optional_float)
    self.assertEqual('', message.optional_string)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

    # Setting a submessage should still return proper presence information.
    message.optional_nested_message.bb = 0
    self.assertTrue(message.HasField('optional_nested_message'))

    # Set the fields to non-default values.
    message.optional_int32 = 5
    message.optional_float = 1.1
    message.optional_string = 'abc'
    message.optional_bool = True
    message.optional_nested_message.bb = 15

    # Clearing the fields unsets them and resets their value to default.
    message.ClearField('optional_int32')
    message.ClearField('optional_float')
    message.ClearField('optional_string')
    message.ClearField('optional_bool')
    message.ClearField('optional_nested_message')

    self.assertEqual(0, message.optional_int32)
    self.assertEqual(0, message.optional_float)
    self.assertEqual('', message.optional_string)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

def testMergeFrom(self):
    msg = map_unittest_pb2.TestMap()
    msg.map_int32_int32[12] = 34
    msg.map_int32_int32[56] = 78
    msg.map_int64_int64[22] = 33
    msg.map_int32_foreign_message[111].c = 5
    msg.map_int32_foreign_message[222].c = 10

    msg2 = map_unittest_pb2.TestMap()
    msg2.map_int32_int32[12] = 55
    msg2.map_int64_int64[88] = 99
    msg2.map_int32_foreign_message[222].c = 15
    msg2.map_int32_foreign_message[222].d = 20
    old_map_value = msg2.map_int32_foreign_message[222]

    msg2.MergeFrom(msg)

    self.assertEqual(34, msg2.map_int32_int32[12])
    self.assertEqual(78, msg2.map_int32_int32[56])
    self.assertEqual(33, msg2.map_int64_int64[22])
    self.assertEqual(99, msg2.map_int64_int64[88])
    self.assertEqual(5, msg2.map_int32_foreign_message[111].c)
    self.assertEqual(10, msg2.map_int32_foreign_message[222].c)
    self.assertFalse(msg2.map_int32_foreign_message[222].HasField('d'))
    self.assertEqual(15, old_map_value.c)

    # Verify that there is only one entry per key, even though the MergeFrom
    # may have internally created multiple entries for a single key in the
    # list representation.
    as_dict = {}
    for key in msg2.map_int32_foreign_message:
      self.assertFalse(key in as_dict)
      as_dict[key] = msg2.map_int32_foreign_message[key].c

    self.assertEqual({111: 5, 222: 10}, as_dict)

    # Special case: test that delete of item really removes the item, even if
    # there might have physically been duplicate keys due to the previous merge.
    # This is only a special case for the C++ implementation which stores the
    # map as an array.
    del msg2.map_int32_int32[12]
    self.assertFalse(12 in msg2.map_int32_int32)

    del msg2.map_int32_foreign_message[222]
    self.assertFalse(222 in msg2.map_int32_foreign_message)

def testFieldPresence(self):
    message = unittest_pb2.TestAllTypes()

    self.assertFalse(message.HasField("optional_int32"))
    self.assertFalse(message.HasField("optional_bool"))
    self.assertFalse(message.HasField("optional_nested_message"))

    with self.assertRaises(ValueError):
      message.HasField("field_doesnt_exist")

    with self.assertRaises(ValueError):
      message.HasField("repeated_int32")
    with self.assertRaises(ValueError):
      message.HasField("repeated_nested_message")

    self.assertEqual(0, message.optional_int32)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

    # Fields are set even when setting the values to default values.
    message.optional_int32 = 0
    message.optional_bool = False
    message.optional_nested_message.bb = 0
    self.assertTrue(message.HasField("optional_int32"))
    self.assertTrue(message.HasField("optional_bool"))
    self.assertTrue(message.HasField("optional_nested_message"))

    # Set the fields to non-default values.
    message.optional_int32 = 5
    message.optional_bool = True
    message.optional_nested_message.bb = 15

    self.assertTrue(message.HasField("optional_int32"))
    self.assertTrue(message.HasField("optional_bool"))
    self.assertTrue(message.HasField("optional_nested_message"))

    # Clearing the fields unsets them and resets their value to default.
    message.ClearField("optional_int32")
    message.ClearField("optional_bool")
    message.ClearField("optional_nested_message")

    self.assertFalse(message.HasField("optional_int32"))
    self.assertFalse(message.HasField("optional_bool"))
    self.assertFalse(message.HasField("optional_nested_message"))
    self.assertEqual(0, message.optional_int32)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

  # TODO(tibell): The C++ implementations actually allows assignment
  # of unknown enum values to *scalar* fields (but not repeated
  # fields). Once checked enum fields becomes the default in the
  # Python implementation, the C++ implementation should follow suit.

def testPythonicInit(self):
    message = unittest_pb2.TestAllTypes(
        optional_int32=100,
        optional_fixed32=200,
        optional_float=300.5,
        optional_bytes=b'x',
        optionalgroup={'a': 400},
        optional_nested_message={'bb': 500},
        optional_nested_enum='BAZ',
        repeatedgroup=[{'a': 600},
                       {'a': 700}],
        repeated_nested_enum=['FOO', unittest_pb2.TestAllTypes.BAR],
        default_int32=800,
        oneof_string='y')
    self.assertIsInstance(message, unittest_pb2.TestAllTypes)
    self.assertEqual(100, message.optional_int32)
    self.assertEqual(200, message.optional_fixed32)
    self.assertEqual(300.5, message.optional_float)
    self.assertEqual(b'x', message.optional_bytes)
    self.assertEqual(400, message.optionalgroup.a)
    self.assertIsInstance(message.optional_nested_message, unittest_pb2.TestAllTypes.NestedMessage)
    self.assertEqual(500, message.optional_nested_message.bb)
    self.assertEqual(unittest_pb2.TestAllTypes.BAZ,
                     message.optional_nested_enum)
    self.assertEqual(2, len(message.repeatedgroup))
    self.assertEqual(600, message.repeatedgroup[0].a)
    self.assertEqual(700, message.repeatedgroup[1].a)
    self.assertEqual(2, len(message.repeated_nested_enum))
    self.assertEqual(unittest_pb2.TestAllTypes.FOO,
                     message.repeated_nested_enum[0])
    self.assertEqual(unittest_pb2.TestAllTypes.BAR,
                     message.repeated_nested_enum[1])
    self.assertEqual(800, message.default_int32)
    self.assertEqual('y', message.oneof_string)
    self.assertFalse(message.HasField('optional_int64'))
    self.assertEqual(0, len(message.repeated_float))
    self.assertEqual(42, message.default_int64)

    message = unittest_pb2.TestAllTypes(optional_nested_enum=u'BAZ')
    self.assertEqual(unittest_pb2.TestAllTypes.BAZ,
                     message.optional_nested_enum)

    with self.assertRaises(ValueError):
      unittest_pb2.TestAllTypes(
          optional_nested_message={'INVALID_NESTED_FIELD': 17})

    with self.assertRaises(TypeError):
      unittest_pb2.TestAllTypes(
          optional_nested_message={'bb': 'INVALID_VALUE_TYPE'})

    with self.assertRaises(ValueError):
      unittest_pb2.TestAllTypes(optional_nested_enum='INVALID_LABEL')

    with self.assertRaises(ValueError):
      unittest_pb2.TestAllTypes(repeated_nested_enum='FOO')



# Class to test proto3-only features/behavior (updated field presence & enums)

def testFieldPresence(self):
    message = unittest_proto3_arena_pb2.TestAllTypes()

    # We can't test presence of non-repeated, non-submessage fields.
    with self.assertRaises(ValueError):
      message.HasField('optional_int32')
    with self.assertRaises(ValueError):
      message.HasField('optional_float')
    with self.assertRaises(ValueError):
      message.HasField('optional_string')
    with self.assertRaises(ValueError):
      message.HasField('optional_bool')

    # But we can still test presence of submessage fields.
    self.assertFalse(message.HasField('optional_nested_message'))

    # As with proto2, we can't test presence of fields that don't exist, or
    # repeated fields.
    with self.assertRaises(ValueError):
      message.HasField('field_doesnt_exist')

    with self.assertRaises(ValueError):
      message.HasField('repeated_int32')
    with self.assertRaises(ValueError):
      message.HasField('repeated_nested_message')

    # Fields should default to their type-specific default.
    self.assertEqual(0, message.optional_int32)
    self.assertEqual(0, message.optional_float)
    self.assertEqual('', message.optional_string)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

    # Setting a submessage should still return proper presence information.
    message.optional_nested_message.bb = 0
    self.assertTrue(message.HasField('optional_nested_message'))

    # Set the fields to non-default values.
    message.optional_int32 = 5
    message.optional_float = 1.1
    message.optional_string = 'abc'
    message.optional_bool = True
    message.optional_nested_message.bb = 15

    # Clearing the fields unsets them and resets their value to default.
    message.ClearField('optional_int32')
    message.ClearField('optional_float')
    message.ClearField('optional_string')
    message.ClearField('optional_bool')
    message.ClearField('optional_nested_message')

    self.assertEqual(0, message.optional_int32)
    self.assertEqual(0, message.optional_float)
    self.assertEqual('', message.optional_string)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

def testFieldPresence(self):
    message = unittest_pb2.TestAllTypes()

    self.assertFalse(message.HasField("optional_int32"))
    self.assertFalse(message.HasField("optional_bool"))
    self.assertFalse(message.HasField("optional_nested_message"))

    with self.assertRaises(ValueError):
      message.HasField("field_doesnt_exist")

    with self.assertRaises(ValueError):
      message.HasField("repeated_int32")
    with self.assertRaises(ValueError):
      message.HasField("repeated_nested_message")

    self.assertEqual(0, message.optional_int32)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

    # Fields are set even when setting the values to default values.
    message.optional_int32 = 0
    message.optional_bool = False
    message.optional_nested_message.bb = 0
    self.assertTrue(message.HasField("optional_int32"))
    self.assertTrue(message.HasField("optional_bool"))
    self.assertTrue(message.HasField("optional_nested_message"))

    # Set the fields to non-default values.
    message.optional_int32 = 5
    message.optional_bool = True
    message.optional_nested_message.bb = 15

    self.assertTrue(message.HasField("optional_int32"))
    self.assertTrue(message.HasField("optional_bool"))
    self.assertTrue(message.HasField("optional_nested_message"))

    # Clearing the fields unsets them and resets their value to default.
    message.ClearField("optional_int32")
    message.ClearField("optional_bool")
    message.ClearField("optional_nested_message")

    self.assertFalse(message.HasField("optional_int32"))
    self.assertFalse(message.HasField("optional_bool"))
    self.assertFalse(message.HasField("optional_nested_message"))
    self.assertEqual(0, message.optional_int32)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

  # TODO(tibell): The C++ implementations actually allows assignment
  # of unknown enum values to *scalar* fields (but not repeated
  # fields). Once checked enum fields becomes the default in the
  # Python implementation, the C++ implementation should follow suit.

def testPythonicInit(self):
    message = unittest_pb2.TestAllTypes(
        optional_int32=100,
        optional_fixed32=200,
        optional_float=300.5,
        optional_bytes=b'x',
        optionalgroup={'a': 400},
        optional_nested_message={'bb': 500},
        optional_nested_enum='BAZ',
        repeatedgroup=[{'a': 600},
                       {'a': 700}],
        repeated_nested_enum=['FOO', unittest_pb2.TestAllTypes.BAR],
        default_int32=800,
        oneof_string='y')
    self.assertIsInstance(message, unittest_pb2.TestAllTypes)
    self.assertEqual(100, message.optional_int32)
    self.assertEqual(200, message.optional_fixed32)
    self.assertEqual(300.5, message.optional_float)
    self.assertEqual(b'x', message.optional_bytes)
    self.assertEqual(400, message.optionalgroup.a)
    self.assertIsInstance(message.optional_nested_message, unittest_pb2.TestAllTypes.NestedMessage)
    self.assertEqual(500, message.optional_nested_message.bb)
    self.assertEqual(unittest_pb2.TestAllTypes.BAZ,
                     message.optional_nested_enum)
    self.assertEqual(2, len(message.repeatedgroup))
    self.assertEqual(600, message.repeatedgroup[0].a)
    self.assertEqual(700, message.repeatedgroup[1].a)
    self.assertEqual(2, len(message.repeated_nested_enum))
    self.assertEqual(unittest_pb2.TestAllTypes.FOO,
                     message.repeated_nested_enum[0])
    self.assertEqual(unittest_pb2.TestAllTypes.BAR,
                     message.repeated_nested_enum[1])
    self.assertEqual(800, message.default_int32)
    self.assertEqual('y', message.oneof_string)
    self.assertFalse(message.HasField('optional_int64'))
    self.assertEqual(0, len(message.repeated_float))
    self.assertEqual(42, message.default_int64)

    message = unittest_pb2.TestAllTypes(optional_nested_enum=u'BAZ')
    self.assertEqual(unittest_pb2.TestAllTypes.BAZ,
                     message.optional_nested_enum)

    with self.assertRaises(ValueError):
      unittest_pb2.TestAllTypes(
          optional_nested_message={'INVALID_NESTED_FIELD': 17})

    with self.assertRaises(TypeError):
      unittest_pb2.TestAllTypes(
          optional_nested_message={'bb': 'INVALID_VALUE_TYPE'})

    with self.assertRaises(ValueError):
      unittest_pb2.TestAllTypes(optional_nested_enum='INVALID_LABEL')

    with self.assertRaises(ValueError):
      unittest_pb2.TestAllTypes(repeated_nested_enum='FOO')


# Class to test proto3-only features/behavior (updated field presence & enums)

def testFieldPresence(self):
    message = unittest_proto3_arena_pb2.TestAllTypes()

    # We can't test presence of non-repeated, non-submessage fields.
    with self.assertRaises(ValueError):
      message.HasField('optional_int32')
    with self.assertRaises(ValueError):
      message.HasField('optional_float')
    with self.assertRaises(ValueError):
      message.HasField('optional_string')
    with self.assertRaises(ValueError):
      message.HasField('optional_bool')

    # But we can still test presence of submessage fields.
    self.assertFalse(message.HasField('optional_nested_message'))

    # As with proto2, we can't test presence of fields that don't exist, or
    # repeated fields.
    with self.assertRaises(ValueError):
      message.HasField('field_doesnt_exist')

    with self.assertRaises(ValueError):
      message.HasField('repeated_int32')
    with self.assertRaises(ValueError):
      message.HasField('repeated_nested_message')

    # Fields should default to their type-specific default.
    self.assertEqual(0, message.optional_int32)
    self.assertEqual(0, message.optional_float)
    self.assertEqual('', message.optional_string)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)

    # Setting a submessage should still return proper presence information.
    message.optional_nested_message.bb = 0
    self.assertTrue(message.HasField('optional_nested_message'))

    # Set the fields to non-default values.
    message.optional_int32 = 5
    message.optional_float = 1.1
    message.optional_string = 'abc'
    message.optional_bool = True
    message.optional_nested_message.bb = 15

    # Clearing the fields unsets them and resets their value to default.
    message.ClearField('optional_int32')
    message.ClearField('optional_float')
    message.ClearField('optional_string')
    message.ClearField('optional_bool')
    message.ClearField('optional_nested_message')

    self.assertEqual(0, message.optional_int32)
    self.assertEqual(0, message.optional_float)
    self.assertEqual('', message.optional_string)
    self.assertEqual(False, message.optional_bool)
    self.assertEqual(0, message.optional_nested_message.bb)