message_test.py 文件源码

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'))