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#! /usr/bin/python
#
# Protocol Buffers - Google's data interchange format
# Copyright 2008 Google Inc. All rights reserved.
# http://code.google.com/p/protobuf/
#
# 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.output_stream."""
__author__ = 'robinson@google.com (Will Robinson)'
import unittest
from google.protobuf import message
from google.protobuf.internal import output_stream
from google.protobuf.internal import wire_format
class OutputStreamTest(unittest.TestCase):
def setUp(self):
self.stream = output_stream.OutputStream()
def testAppendRawBytes(self):
# Empty string.
self.stream.AppendRawBytes('')
self.assertEqual('', self.stream.ToString())
# Nonempty string.
self.stream.AppendRawBytes('abc')
self.assertEqual('abc', self.stream.ToString())
# Ensure that we're actually appending.
self.stream.AppendRawBytes('def')
self.assertEqual('abcdef', self.stream.ToString())
def AppendNumericTestHelper(self, append_fn, values_and_strings):
"""For each (value, expected_string) pair in values_and_strings,
calls an OutputStream.Append*(value) method on an OutputStream and ensures
that the string written to that stream matches expected_string.
Args:
append_fn: Unbound OutputStream method that takes an integer or
long value as input.
values_and_strings: Iterable of (value, expected_string) pairs.
"""
for conversion in (int, long):
for value, string in values_and_strings:
stream = output_stream.OutputStream()
expected_string = ''
append_fn(stream, conversion(value))
expected_string += string
self.assertEqual(expected_string, stream.ToString())
def AppendOverflowTestHelper(self, append_fn, value):
"""Calls an OutputStream.Append*(value) method and asserts
that the method raises message.EncodeError.
Args:
append_fn: Unbound OutputStream method that takes an integer or
long value as input.
value: Value to pass to append_fn which should cause an
message.EncodeError.
"""
stream = output_stream.OutputStream()
self.assertRaises(message.EncodeError, append_fn, stream, value)
def testAppendLittleEndian32(self):
append_fn = output_stream.OutputStream.AppendLittleEndian32
values_and_expected_strings = [
(0, '\x00\x00\x00\x00'),
(1, '\x01\x00\x00\x00'),
((1 << 32) - 1, '\xff\xff\xff\xff'),
]
self.AppendNumericTestHelper(append_fn, values_and_expected_strings)
self.AppendOverflowTestHelper(append_fn, 1 << 32)
self.AppendOverflowTestHelper(append_fn, -1)
def testAppendLittleEndian64(self):
append_fn = output_stream.OutputStream.AppendLittleEndian64
values_and_expected_strings = [
(0, '\x00\x00\x00\x00\x00\x00\x00\x00'),
(1, '\x01\x00\x00\x00\x00\x00\x00\x00'),
((1 << 64) - 1, '\xff\xff\xff\xff\xff\xff\xff\xff'),
]
self.AppendNumericTestHelper(append_fn, values_and_expected_strings)
self.AppendOverflowTestHelper(append_fn, 1 << 64)
self.AppendOverflowTestHelper(append_fn, -1)
def testAppendVarint32(self):
append_fn = output_stream.OutputStream.AppendVarint32
values_and_expected_strings = [
(0, '\x00'),
(1, '\x01'),
(127, '\x7f'),
(128, '\x80\x01'),
(-1, '\xff\xff\xff\xff\xff\xff\xff\xff\xff\x01'),
(wire_format.INT32_MAX, '\xff\xff\xff\xff\x07'),
(wire_format.INT32_MIN, '\x80\x80\x80\x80\xf8\xff\xff\xff\xff\x01'),
]
self.AppendNumericTestHelper(append_fn, values_and_expected_strings)
self.AppendOverflowTestHelper(append_fn, wire_format.INT32_MAX + 1)
self.AppendOverflowTestHelper(append_fn, wire_format.INT32_MIN - 1)
def testAppendVarUInt32(self):
append_fn = output_stream.OutputStream.AppendVarUInt32
values_and_expected_strings = [
(0, '\x00'),
(1, '\x01'),
(127, '\x7f'),
(128, '\x80\x01'),
(wire_format.UINT32_MAX, '\xff\xff\xff\xff\x0f'),
]
self.AppendNumericTestHelper(append_fn, values_and_expected_strings)
self.AppendOverflowTestHelper(append_fn, -1)
self.AppendOverflowTestHelper(append_fn, wire_format.UINT32_MAX + 1)
def testAppendVarint64(self):
append_fn = output_stream.OutputStream.AppendVarint64
values_and_expected_strings = [
(0, '\x00'),
(1, '\x01'),
(127, '\x7f'),
(128, '\x80\x01'),
(-1, '\xff\xff\xff\xff\xff\xff\xff\xff\xff\x01'),
(wire_format.INT64_MAX, '\xff\xff\xff\xff\xff\xff\xff\xff\x7f'),
(wire_format.INT64_MIN, '\x80\x80\x80\x80\x80\x80\x80\x80\x80\x01'),
]
self.AppendNumericTestHelper(append_fn, values_and_expected_strings)
self.AppendOverflowTestHelper(append_fn, wire_format.INT64_MAX + 1)
self.AppendOverflowTestHelper(append_fn, wire_format.INT64_MIN - 1)
def testAppendVarUInt64(self):
append_fn = output_stream.OutputStream.AppendVarUInt64
values_and_expected_strings = [
(0, '\x00'),
(1, '\x01'),
(127, '\x7f'),
(128, '\x80\x01'),
(wire_format.UINT64_MAX, '\xff\xff\xff\xff\xff\xff\xff\xff\xff\x01'),
]
self.AppendNumericTestHelper(append_fn, values_and_expected_strings)
self.AppendOverflowTestHelper(append_fn, -1)
self.AppendOverflowTestHelper(append_fn, wire_format.UINT64_MAX + 1)
if __name__ == '__main__':
unittest.main()
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