1
# Copyright (C) 2006, 2009, 2010 Canonical Ltd
1
# Copyright (C) 2006 by Canonical Ltd
3
3
# This program is free software; you can redistribute it and/or modify
4
4
# it under the terms of the GNU General Public License as published by
13
13
# You should have received a copy of the GNU General Public License
14
14
# along with this program; if not, write to the Free Software
15
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
15
# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
18
18
"""Tests for tuned_gzip."""
37
37
def decompress(self, buf):
38
38
"""Return an empty string as though we are at eof."""
39
# note that the zlib module *overwrites* unused data
39
# note that the zlib module *overwrites* unused data
40
40
# on writes after EOF.
41
41
self.unused_data = buf
72
72
def test__read_short_remainder(self):
73
73
# a _read call at the end of a compressed hunk should
74
# read more bytes if there is less than 8 bytes (the
74
# read more bytes if there is less than 8 bytes (the
75
75
# gzip trailer) unread.
76
76
stream = StringIO('\0\0\0\0\0\0\0\0')
77
77
myfile = tuned_gzip.GzipFile(fileobj=stream)
85
85
self.assertEqual('', stream.read())
86
86
# and it should be new member time in the stream.
87
87
self.failUnless(myfile._new_member)
89
def test_negative_crc(self):
90
"""Content with a negative crc should not break when written"""
92
gfile = tuned_gzip.GzipFile(mode="w", fileobj=sio)
95
self.assertEqual(gfile.crc & 0xFFFFFFFFL, 0xFF000000L)
96
self.assertEqual(sio.getvalue()[-8:-4], "\x00\x00\x00\xFF")
99
class TestToGzip(TestCase):
101
def assertToGzip(self, chunks):
102
bytes = ''.join(chunks)
103
gzfromchunks = tuned_gzip.chunks_to_gzip(chunks)
104
gzfrombytes = tuned_gzip.bytes_to_gzip(bytes)
105
self.assertEqual(gzfrombytes, gzfromchunks)
106
decoded = tuned_gzip.GzipFile(fileobj=StringIO(gzfromchunks)).read()
107
self.assertEqual(bytes, decoded)
109
def test_single_chunk(self):
110
self.assertToGzip(['a modest chunk\nwith some various\nbits\n'])
112
def test_simple_text(self):
113
self.assertToGzip(['some\n', 'strings\n', 'to\n', 'process\n'])
115
def test_large_chunks(self):
116
self.assertToGzip(['a large string\n'*1024])
117
self.assertToGzip(['a large string\n']*1024)
119
def test_enormous_chunks(self):
120
self.assertToGzip(['a large string\n'*1024*256])
121
self.assertToGzip(['a large string\n']*1024*256)