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