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# Protocol Buffers - Google's data interchange format
# Copyright 2008 Google Inc.
# http://code.google.com/p/protobuf/
#
# 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.
"""Test for google.protobuf.internal.wire_format."""
__author__ = 'robinson@google.com (Will Robinson)'
import unittest
from google.protobuf import message
from google.protobuf.internal import wire_format
class WireFormatTest(unittest.TestCase):
def testPackTag(self):
field_number = 0xabc
tag_type = 2
self.assertEqual((field_number << 3) | tag_type,
wire_format.PackTag(field_number, tag_type))
PackTag = wire_format.PackTag
# Number too high.
self.assertRaises(message.EncodeError, PackTag, field_number, 6)
# Number too low.
self.assertRaises(message.EncodeError, PackTag, field_number, -1)
def testUnpackTag(self):
# Test field numbers that will require various varint sizes.
for expected_field_number in (1, 15, 16, 2047, 2048):
for expected_wire_type in range(6): # Highest-numbered wiretype is 5.
field_number, wire_type = wire_format.UnpackTag(
wire_format.PackTag(expected_field_number, expected_wire_type))
self.assertEqual(expected_field_number, field_number)
self.assertEqual(expected_wire_type, wire_type)
self.assertRaises(TypeError, wire_format.UnpackTag, None)
self.assertRaises(TypeError, wire_format.UnpackTag, 'abc')
self.assertRaises(TypeError, wire_format.UnpackTag, 0.0)
self.assertRaises(TypeError, wire_format.UnpackTag, object())
def testZigZagEncode(self):
Z = wire_format.ZigZagEncode
self.assertEqual(0, Z(0))
self.assertEqual(1, Z(-1))
self.assertEqual(2, Z(1))
self.assertEqual(3, Z(-2))
self.assertEqual(4, Z(2))
self.assertEqual(0xfffffffe, Z(0x7fffffff))
self.assertEqual(0xffffffff, Z(-0x80000000))
self.assertEqual(0xfffffffffffffffe, Z(0x7fffffffffffffff))
self.assertEqual(0xffffffffffffffff, Z(-0x8000000000000000))
self.assertRaises(TypeError, Z, None)
self.assertRaises(TypeError, Z, 'abcd')
self.assertRaises(TypeError, Z, 0.0)
self.assertRaises(TypeError, Z, object())
def testZigZagDecode(self):
Z = wire_format.ZigZagDecode
self.assertEqual(0, Z(0))
self.assertEqual(-1, Z(1))
self.assertEqual(1, Z(2))
self.assertEqual(-2, Z(3))
self.assertEqual(2, Z(4))
self.assertEqual(0x7fffffff, Z(0xfffffffe))
self.assertEqual(-0x80000000, Z(0xffffffff))
self.assertEqual(0x7fffffffffffffff, Z(0xfffffffffffffffe))
self.assertEqual(-0x8000000000000000, Z(0xffffffffffffffff))
self.assertRaises(TypeError, Z, None)
self.assertRaises(TypeError, Z, 'abcd')
self.assertRaises(TypeError, Z, 0.0)
self.assertRaises(TypeError, Z, object())
def NumericByteSizeTestHelper(self, byte_size_fn, value, expected_value_size):
# Use field numbers that cause various byte sizes for the tag information.
for field_number, tag_bytes in ((15, 1), (16, 2), (2047, 2), (2048, 3)):
expected_size = expected_value_size + tag_bytes
actual_size = byte_size_fn(field_number, value)
self.assertEqual(expected_size, actual_size,
'byte_size_fn: %s, field_number: %d, value: %r\n'
'Expected: %d, Actual: %d'% (
byte_size_fn, field_number, value, expected_size, actual_size))
def testByteSizeFunctions(self):
# Test all numeric *ByteSize() functions.
NUMERIC_ARGS = [
# Int32ByteSize().
[wire_format.Int32ByteSize, 0, 1],
[wire_format.Int32ByteSize, 127, 1],
[wire_format.Int32ByteSize, 128, 2],
[wire_format.Int32ByteSize, -1, 10],
# Int64ByteSize().
[wire_format.Int64ByteSize, 0, 1],
[wire_format.Int64ByteSize, 127, 1],
[wire_format.Int64ByteSize, 128, 2],
[wire_format.Int64ByteSize, -1, 10],
# UInt32ByteSize().
[wire_format.UInt32ByteSize, 0, 1],
[wire_format.UInt32ByteSize, 127, 1],
[wire_format.UInt32ByteSize, 128, 2],
[wire_format.UInt32ByteSize, wire_format.UINT32_MAX, 5],
# UInt64ByteSize().
[wire_format.UInt64ByteSize, 0, 1],
[wire_format.UInt64ByteSize, 127, 1],
[wire_format.UInt64ByteSize, 128, 2],
[wire_format.UInt64ByteSize, wire_format.UINT64_MAX, 10],
# SInt32ByteSize().
[wire_format.SInt32ByteSize, 0, 1],
[wire_format.SInt32ByteSize, -1, 1],
[wire_format.SInt32ByteSize, 1, 1],
[wire_format.SInt32ByteSize, -63, 1],
[wire_format.SInt32ByteSize, 63, 1],
[wire_format.SInt32ByteSize, -64, 1],
[wire_format.SInt32ByteSize, 64, 2],
# SInt64ByteSize().
[wire_format.SInt64ByteSize, 0, 1],
[wire_format.SInt64ByteSize, -1, 1],
[wire_format.SInt64ByteSize, 1, 1],
[wire_format.SInt64ByteSize, -63, 1],
[wire_format.SInt64ByteSize, 63, 1],
[wire_format.SInt64ByteSize, -64, 1],
[wire_format.SInt64ByteSize, 64, 2],
# Fixed32ByteSize().
[wire_format.Fixed32ByteSize, 0, 4],
[wire_format.Fixed32ByteSize, wire_format.UINT32_MAX, 4],
# Fixed64ByteSize().
[wire_format.Fixed64ByteSize, 0, 8],
[wire_format.Fixed64ByteSize, wire_format.UINT64_MAX, 8],
# SFixed32ByteSize().
[wire_format.SFixed32ByteSize, 0, 4],
[wire_format.SFixed32ByteSize, wire_format.INT32_MIN, 4],
[wire_format.SFixed32ByteSize, wire_format.INT32_MAX, 4],
# SFixed64ByteSize().
[wire_format.SFixed64ByteSize, 0, 8],
[wire_format.SFixed64ByteSize, wire_format.INT64_MIN, 8],
[wire_format.SFixed64ByteSize, wire_format.INT64_MAX, 8],
# FloatByteSize().
[wire_format.FloatByteSize, 0.0, 4],
[wire_format.FloatByteSize, 1000000000.0, 4],
[wire_format.FloatByteSize, -1000000000.0, 4],
# DoubleByteSize().
[wire_format.DoubleByteSize, 0.0, 8],
[wire_format.DoubleByteSize, 1000000000.0, 8],
[wire_format.DoubleByteSize, -1000000000.0, 8],
# BoolByteSize().
[wire_format.BoolByteSize, False, 1],
[wire_format.BoolByteSize, True, 1],
# EnumByteSize().
[wire_format.EnumByteSize, 0, 1],
[wire_format.EnumByteSize, 127, 1],
[wire_format.EnumByteSize, 128, 2],
[wire_format.EnumByteSize, wire_format.UINT32_MAX, 5],
]
for args in NUMERIC_ARGS:
self.NumericByteSizeTestHelper(*args)
# Test strings and bytes.
for byte_size_fn in (wire_format.StringByteSize, wire_format.BytesByteSize):
# 1 byte for tag, 1 byte for length, 3 bytes for contents.
self.assertEqual(5, byte_size_fn(10, 'abc'))
# 2 bytes for tag, 1 byte for length, 3 bytes for contents.
self.assertEqual(6, byte_size_fn(16, 'abc'))
# 2 bytes for tag, 2 bytes for length, 128 bytes for contents.
self.assertEqual(132, byte_size_fn(16, 'a' * 128))
class MockMessage(object):
def __init__(self, byte_size):
self.byte_size = byte_size
def ByteSize(self):
return self.byte_size
message_byte_size = 10
mock_message = MockMessage(byte_size=message_byte_size)
# Test groups.
# (2 * 1) bytes for begin and end tags, plus message_byte_size.
self.assertEqual(2 + message_byte_size,
wire_format.GroupByteSize(1, mock_message))
# (2 * 2) bytes for begin and end tags, plus message_byte_size.
self.assertEqual(4 + message_byte_size,
wire_format.GroupByteSize(16, mock_message))
# Test messages.
# 1 byte for tag, plus 1 byte for length, plus contents.
self.assertEqual(2 + mock_message.byte_size,
wire_format.MessageByteSize(1, mock_message))
# 2 bytes for tag, plus 1 byte for length, plus contents.
self.assertEqual(3 + mock_message.byte_size,
wire_format.MessageByteSize(16, mock_message))
# 2 bytes for tag, plus 2 bytes for length, plus contents.
mock_message.byte_size = 128
self.assertEqual(4 + mock_message.byte_size,
wire_format.MessageByteSize(16, mock_message))
# Test message set item byte size.
# 4 bytes for tags, plus 1 byte for length, plus 1 byte for type_id,
# plus contents.
mock_message.byte_size = 10
self.assertEqual(mock_message.byte_size + 6,
wire_format.MessageSetItemByteSize(1, mock_message))
# 4 bytes for tags, plus 2 bytes for length, plus 1 byte for type_id,
# plus contents.
mock_message.byte_size = 128
self.assertEqual(mock_message.byte_size + 7,
wire_format.MessageSetItemByteSize(1, mock_message))
# 4 bytes for tags, plus 2 bytes for length, plus 2 byte for type_id,
# plus contents.
self.assertEqual(mock_message.byte_size + 8,
wire_format.MessageSetItemByteSize(128, mock_message))
# Too-long varint.
self.assertRaises(message.EncodeError,
wire_format.UInt64ByteSize, 1, 1 << 128)
if __name__ == '__main__':
unittest.main()
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