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#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# Copyright 2020 Confluent Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
import binascii
from decimal import Decimal
from io import BytesIO
import pytest
from confluent_kafka.schema_registry.protobuf import (ProtobufSerializer,
_create_index_array,
decimal_to_protobuf,
protobuf_to_decimal)
from confluent_kafka.schema_registry.serde import SchemaId
from tests.integration.schema_registry.data.proto import (DependencyTestProto_pb2,
metadata_proto_pb2)
@pytest.mark.parametrize("pb2, coordinates", [
(DependencyTestProto_pb2.DependencyMessage, [0]),
(metadata_proto_pb2.ControlMessage.Watermark, [15, 1]), # [ControlMessage, Watermark]
(metadata_proto_pb2.HDFSOptions.ImportOptions.Generator.KacohaConfig,
[4, 0, 1, 2]) # [HdfsOptions, ImportOptions, Generator, KacohaConfig ]
])
def test_create_index(pb2, coordinates):
msg_idx = _create_index_array(pb2.DESCRIPTOR)
assert msg_idx == coordinates
@pytest.mark.parametrize("pb2", [
DependencyTestProto_pb2.DependencyMessage,
metadata_proto_pb2.ControlMessage.Watermark,
metadata_proto_pb2.HDFSOptions.ImportOptions.Generator.KacohaConfig
])
@pytest.mark.parametrize("zigzag", [True, False])
def test_index_serialization(pb2, zigzag):
msg_idx = _create_index_array(pb2.DESCRIPTOR)
buf = BytesIO()
ProtobufSerializer._encode_varints(buf, msg_idx, zigzag=zigzag)
buf.flush()
# reset buffer cursor
buf.seek(0)
decoded_msg_idx = SchemaId._read_index_array(buf, zigzag=zigzag)
buf.close()
assert decoded_msg_idx == msg_idx
@pytest.mark.parametrize("msg_idx, zigzag, expected_hex", [
# b2a_hex returns hex pairs
([0], True, b'00'), # special case [0]
([0], False, b'00'), # special case [0]
([1], True, b'0202'),
([1], False, b'0101'),
([127, 8, 9], True, b'06fe011012'),
([127, 8, 9], False, b'037f0809'),
([128], True, b'028002'),
([128], False, b'018001'),
([9223372036854775807], True, b'02feffffffffffffffff01'),
([9223372036854775807], False, b'01ffffffffffffffff7f')
])
def test_index_encoder(msg_idx, zigzag, expected_hex):
buf = BytesIO()
ProtobufSerializer._encode_varints(buf, msg_idx, zigzag=zigzag)
buf.flush()
buf.seek(0)
assert binascii.b2a_hex(buf.read()) == expected_hex
# reset reader and test decoder
buf.seek(0)
decoded_msg_idx = SchemaId._read_index_array(buf, zigzag=zigzag)
assert decoded_msg_idx == msg_idx
@pytest.mark.parametrize("decimal, scale", [
("0", 0),
("1.01", 2),
("123456789123456789.56", 2),
("1234", 0),
("1234.5", 1),
("-0", 0),
("-1.01", 2),
("-123456789123456789.56", 2),
("-1234", 0),
("-1234.5", 1),
("-1234.56", 2)
])
def test_proto_decimal(decimal, scale):
input = Decimal(decimal)
converted = decimal_to_protobuf(input, scale)
result = protobuf_to_decimal(converted)
assert result == input
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