blob: 66156023f7448873441cc86fea0af6ce63490731 [file] [log] [blame]
import sys
import os
import shutil
import tempfile
import unittest
import tarfile
from test import test_support
# Check for our compression modules.
try:
import gzip
gzip.GzipFile
except (ImportError, AttributeError):
gzip = None
try:
import bz2
except ImportError:
bz2 = None
def path(path):
return test_support.findfile(path)
testtar = path("testtar.tar")
tempdir = os.path.join(tempfile.gettempdir(), "testtar" + os.extsep + "dir")
tempname = test_support.TESTFN
membercount = 10
def tarname(comp=""):
if not comp:
return testtar
return os.path.join(tempdir, "%s%s%s" % (testtar, os.extsep, comp))
def dirname():
if not os.path.exists(tempdir):
os.mkdir(tempdir)
return tempdir
def tmpname():
return tempname
class BaseTest(unittest.TestCase):
comp = ''
mode = 'r'
sep = ':'
def setUp(self):
mode = self.mode + self.sep + self.comp
self.tar = tarfile.open(tarname(self.comp), mode)
def tearDown(self):
self.tar.close()
class ReadTest(BaseTest):
def test(self):
"""Test member extraction.
"""
members = 0
for tarinfo in self.tar:
members += 1
if not tarinfo.isreg():
continue
f = self.tar.extractfile(tarinfo)
self.assert_(len(f.read()) == tarinfo.size,
"size read does not match expected size")
f.close()
self.assert_(members == membercount,
"could not find all members")
def test_sparse(self):
"""Test sparse member extraction.
"""
if self.sep != "|":
f1 = self.tar.extractfile("S-SPARSE")
f2 = self.tar.extractfile("S-SPARSE-WITH-NULLS")
self.assert_(f1.read() == f2.read(),
"_FileObject failed on sparse file member")
def test_readlines(self):
"""Test readlines() method of _FileObject.
"""
if self.sep != "|":
filename = "0-REGTYPE-TEXT"
self.tar.extract(filename, dirname())
lines1 = file(os.path.join(dirname(), filename), "rU").readlines()
lines2 = self.tar.extractfile(filename).readlines()
self.assert_(lines1 == lines2,
"_FileObject.readline() does not work correctly")
def test_seek(self):
"""Test seek() method of _FileObject, incl. random reading.
"""
if self.sep != "|":
filename = "0-REGTYPE"
self.tar.extract(filename, dirname())
data = file(os.path.join(dirname(), filename), "rb").read()
tarinfo = self.tar.getmember(filename)
fobj = self.tar.extractfile(tarinfo)
text = fobj.read()
fobj.seek(0)
self.assert_(0 == fobj.tell(),
"seek() to file's start failed")
fobj.seek(2048, 0)
self.assert_(2048 == fobj.tell(),
"seek() to absolute position failed")
fobj.seek(-1024, 1)
self.assert_(1024 == fobj.tell(),
"seek() to negative relative position failed")
fobj.seek(1024, 1)
self.assert_(2048 == fobj.tell(),
"seek() to positive relative position failed")
s = fobj.read(10)
self.assert_(s == data[2048:2058],
"read() after seek failed")
fobj.seek(0, 2)
self.assert_(tarinfo.size == fobj.tell(),
"seek() to file's end failed")
self.assert_(fobj.read() == "",
"read() at file's end did not return empty string")
fobj.seek(-tarinfo.size, 2)
self.assert_(0 == fobj.tell(),
"relative seek() to file's start failed")
fobj.seek(512)
s1 = fobj.readlines()
fobj.seek(512)
s2 = fobj.readlines()
self.assert_(s1 == s2,
"readlines() after seek failed")
fobj.close()
class ReadStreamTest(ReadTest):
sep = "|"
def test(self):
"""Test member extraction, and for StreamError when
seeking backwards.
"""
ReadTest.test(self)
tarinfo = self.tar.getmembers()[0]
f = self.tar.extractfile(tarinfo)
self.assertRaises(tarfile.StreamError, f.read)
def test_stream(self):
"""Compare the normal tar and the stream tar.
"""
stream = self.tar
tar = tarfile.open(tarname(), 'r')
while 1:
t1 = tar.next()
t2 = stream.next()
if t1 is None:
break
self.assert_(t2 is not None, "stream.next() failed.")
if t2.islnk() or t2.issym():
self.assertRaises(tarfile.StreamError, stream.extractfile, t2)
continue
v1 = tar.extractfile(t1)
v2 = stream.extractfile(t2)
if v1 is None:
continue
self.assert_(v2 is not None, "stream.extractfile() failed")
self.assert_(v1.read() == v2.read(), "stream extraction failed")
stream.close()
class WriteTest(BaseTest):
mode = 'w'
def setUp(self):
mode = self.mode + self.sep + self.comp
self.src = tarfile.open(tarname(self.comp), 'r')
self.dstname = tmpname()
self.dst = tarfile.open(self.dstname, mode)
def tearDown(self):
self.src.close()
self.dst.close()
def test_posix(self):
self.dst.posix = 1
self._test()
def test_nonposix(self):
self.dst.posix = 0
self._test()
def test_small(self):
self.dst.add(os.path.join(os.path.dirname(__file__),"cfgparser.1"))
self.dst.close()
self.assertNotEqual(os.stat(self.dstname).st_size, 0)
def _test(self):
for tarinfo in self.src:
if not tarinfo.isreg():
continue
f = self.src.extractfile(tarinfo)
if self.dst.posix and len(tarinfo.name) > tarfile.LENGTH_NAME:
self.assertRaises(ValueError, self.dst.addfile,
tarinfo, f)
else:
self.dst.addfile(tarinfo, f)
class WriteStreamTest(WriteTest):
sep = '|'
class WriteGNULongTest(unittest.TestCase):
"""This testcase checks for correct creation of GNU Longname
and Longlink extensions.
It creates a tarfile and adds empty members with either
long names, long linknames or both and compares the size
of the tarfile with the expected size.
It checks for SF bug #812325 in TarFile._create_gnulong().
While I was writing this testcase, I noticed a second bug
in the same method:
Long{names,links} weren't null-terminated which lead to
bad tarfiles when their length was a multiple of 512. This
is tested as well.
"""
def setUp(self):
self.tar = tarfile.open(tmpname(), "w")
self.tar.posix = False
def tearDown(self):
self.tar.close()
def _length(self, s):
blocks, remainder = divmod(len(s) + 1, 512)
if remainder:
blocks += 1
return blocks * 512
def _calc_size(self, name, link=None):
# initial tar header
count = 512
if len(name) > tarfile.LENGTH_NAME:
# gnu longname extended header + longname
count += 512
count += self._length(name)
if link is not None and len(link) > tarfile.LENGTH_LINK:
# gnu longlink extended header + longlink
count += 512
count += self._length(link)
return count
def _test(self, name, link=None):
tarinfo = tarfile.TarInfo(name)
if link:
tarinfo.linkname = link
tarinfo.type = tarfile.LNKTYPE
self.tar.addfile(tarinfo)
v1 = self._calc_size(name, link)
v2 = self.tar.offset
self.assertEqual(v1, v2, "GNU longname/longlink creation failed")
def test_longname_1023(self):
self._test(("longnam/" * 127) + "longnam")
def test_longname_1024(self):
self._test(("longnam/" * 127) + "longname")
def test_longname_1025(self):
self._test(("longnam/" * 127) + "longname_")
def test_longlink_1023(self):
self._test("name", ("longlnk/" * 127) + "longlnk")
def test_longlink_1024(self):
self._test("name", ("longlnk/" * 127) + "longlink")
def test_longlink_1025(self):
self._test("name", ("longlnk/" * 127) + "longlink_")
def test_longnamelink_1023(self):
self._test(("longnam/" * 127) + "longnam",
("longlnk/" * 127) + "longlnk")
def test_longnamelink_1024(self):
self._test(("longnam/" * 127) + "longname",
("longlnk/" * 127) + "longlink")
def test_longnamelink_1025(self):
self._test(("longnam/" * 127) + "longname_",
("longlnk/" * 127) + "longlink_")
class ExtractHardlinkTest(BaseTest):
def test_hardlink(self):
"""Test hardlink extraction (bug #857297)
"""
# Prevent errors from being caught
self.tar.errorlevel = 1
self.tar.extract("0-REGTYPE", dirname())
try:
# Extract 1-LNKTYPE which is a hardlink to 0-REGTYPE
self.tar.extract("1-LNKTYPE", dirname())
except EnvironmentError, e:
import errno
if e.errno == errno.ENOENT:
self.fail("hardlink not extracted properly")
# Gzip TestCases
class ReadTestGzip(ReadTest):
comp = "gz"
class ReadStreamTestGzip(ReadStreamTest):
comp = "gz"
class WriteTestGzip(WriteTest):
comp = "gz"
class WriteStreamTestGzip(WriteStreamTest):
comp = "gz"
if bz2:
# Bzip2 TestCases
class ReadTestBzip2(ReadTestGzip):
comp = "bz2"
class ReadStreamTestBzip2(ReadStreamTestGzip):
comp = "bz2"
class WriteTestBzip2(WriteTest):
comp = "bz2"
class WriteStreamTestBzip2(WriteStreamTestGzip):
comp = "bz2"
# If importing gzip failed, discard the Gzip TestCases.
if not gzip:
del ReadTestGzip
del ReadStreamTestGzip
del WriteTestGzip
del WriteStreamTestGzip
def test_main():
if gzip:
# create testtar.tar.gz
gzip.open(tarname("gz"), "wb").write(file(tarname(), "rb").read())
if bz2:
# create testtar.tar.bz2
bz2.BZ2File(tarname("bz2"), "wb").write(file(tarname(), "rb").read())
tests = [
ReadTest,
ReadStreamTest,
WriteTest,
WriteStreamTest,
WriteGNULongTest,
]
if hasattr(os, "link"):
tests.append(ExtractHardlinkTest)
if gzip:
tests.extend([
ReadTestGzip, ReadStreamTestGzip,
WriteTestGzip, WriteStreamTestGzip
])
if bz2:
tests.extend([
ReadTestBzip2, ReadStreamTestBzip2,
WriteTestBzip2, WriteStreamTestBzip2
])
try:
test_support.run_unittest(*tests)
finally:
if gzip:
os.remove(tarname("gz"))
if bz2:
os.remove(tarname("bz2"))
if os.path.exists(dirname()):
shutil.rmtree(dirname())
if os.path.exists(tmpname()):
os.remove(tmpname())
if __name__ == "__main__":
test_main()