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Current File : /usr/lib/python2.7/site-packages/google/protobuf/internal/wire_format_test.py
#
# Protocol Buffers - Google's data interchange format
# Copyright 2008 Google Inc.  All rights reserved.
# https://developers.google.com/protocol-buffers/
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met:
#
#     * Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
#     * Redistributions in binary form must reproduce the above
# copyright notice, this list of conditions and the following disclaimer
# in the documentation and/or other materials provided with the
# distribution.
#     * Neither the name of Google Inc. nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

"""Test for google.protobuf.internal.wire_format."""

__author__ = 'robinson@google.com (Will Robinson)'

try:
  import unittest2 as unittest  #PY26
except ImportError:
  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))

    # Test UTF-8 string byte size calculation.
    # 1 byte for tag, 1 byte for length, 8 bytes for content.
    self.assertEqual(10, wire_format.StringByteSize(
        5, b'\xd0\xa2\xd0\xb5\xd1\x81\xd1\x82'.decode('utf-8')))

    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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