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google
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protobuf
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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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