我们从Python开源项目中，提取了以下20个代码示例，用于说明如何使用google.protobuf.message.optional_string()。
def testBadUtf8String(self, message_module): if api_implementation.Type() != 'python': self.skipTest("Skipping testBadUtf8String, currently only the python " "api implementation raises UnicodeDecodeError when a " "string field contains bad utf-8.") bad_utf8_data = test_util.GoldenFileData('bad_utf8_string') with self.assertRaises(UnicodeDecodeError) as context: message_module.TestAllTypes.FromString(bad_utf8_data) self.assertIn('TestAllTypes.optional_string', str(context.exception))
def testAssignByteStringToUnicodeField(self, message_module): """Assigning a byte string to a string field should result in the value being converted to a Unicode string.""" m = message_module.TestAllTypes() m.optional_string = str('') self.assertIsInstance(m.optional_string, six.text_type)
def testParsingMerge(self): """Check the merge behavior when a required or optional field appears multiple times in the input.""" messages = [ unittest_pb2.TestAllTypes(), unittest_pb2.TestAllTypes(), unittest_pb2.TestAllTypes() ] messages[0].optional_int32 = 1 messages[1].optional_int64 = 2 messages[2].optional_int32 = 3 messages[2].optional_string = 'hello' merged_message = unittest_pb2.TestAllTypes() merged_message.optional_int32 = 3 merged_message.optional_int64 = 2 merged_message.optional_string = 'hello' generator = unittest_pb2.TestParsingMerge.RepeatedFieldsGenerator() generator.field1.extend(messages) generator.field2.extend(messages) generator.field3.extend(messages) generator.ext1.extend(messages) generator.ext2.extend(messages) generator.group1.add().field1.MergeFrom(messages[0]) generator.group1.add().field1.MergeFrom(messages[1]) generator.group1.add().field1.MergeFrom(messages[2]) generator.group2.add().field1.MergeFrom(messages[0]) generator.group2.add().field1.MergeFrom(messages[1]) generator.group2.add().field1.MergeFrom(messages[2]) data = generator.SerializeToString() parsing_merge = unittest_pb2.TestParsingMerge() parsing_merge.ParseFromString(data) # Required and optional fields should be merged. self.assertEqual(parsing_merge.required_all_types, merged_message) self.assertEqual(parsing_merge.optional_all_types, merged_message) self.assertEqual(parsing_merge.optionalgroup.optional_group_all_types, merged_message) self.assertEqual(parsing_merge.Extensions[ unittest_pb2.TestParsingMerge.optional_ext], merged_message) # Repeated fields should not be merged. self.assertEqual(len(parsing_merge.repeated_all_types), 3) self.assertEqual(len(parsing_merge.repeatedgroup), 3) self.assertEqual(len(parsing_merge.Extensions[ unittest_pb2.TestParsingMerge.repeated_ext]), 3)
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)
