lib-python.2.5.test.test_tarfile.py Maven / Gradle / Ivy
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Jython is an implementation of the high-level, dynamic, object-oriented
language Python written in 100% Pure Java, and seamlessly integrated with
the Java platform. It thus allows you to run Python on any Java platform.
import sys
import os
import shutil
import tempfile
import StringIO
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 = 13
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())
f = open(os.path.join(dirname(), filename), "rU")
lines1 = f.readlines()
f.close()
lines2 = self.tar.extractfile(filename).readlines()
self.assert_(lines1 == lines2,
"_FileObject.readline() does not work correctly")
def test_iter(self):
# Test iteration over ExFileObject.
if self.sep != "|":
filename = "0-REGTYPE-TEXT"
self.tar.extract(filename, dirname())
f = open(os.path.join(dirname(), filename), "rU")
lines1 = f.readlines()
f.close()
lines2 = [line for line in self.tar.extractfile(filename)]
self.assert_(lines1 == lines2,
"ExFileObject iteration does not work correctly")
def test_seek(self):
"""Test seek() method of _FileObject, incl. random reading.
"""
if self.sep != "|":
filename = "0-REGTYPE-TEXT"
self.tar.extract(filename, dirname())
f = open(os.path.join(dirname(), filename), "rb")
data = f.read()
f.close()
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.seek(0)
self.assert_(len(fobj.readline()) == fobj.tell(),
"tell() after readline() failed")
fobj.seek(512)
self.assert_(len(fobj.readline()) + 512 == fobj.tell(),
"tell() after seek() and readline() failed")
fobj.seek(0)
line = fobj.readline()
self.assert_(fobj.read() == data[len(line):],
"read() after readline() failed")
fobj.close()
def test_old_dirtype(self):
"""Test old style dirtype member (bug #1336623).
"""
# Old tars create directory members using a REGTYPE
# header with a "/" appended to the filename field.
# Create an old tar style directory entry.
filename = tmpname()
tarinfo = tarfile.TarInfo("directory/")
tarinfo.type = tarfile.REGTYPE
fobj = open(filename, "w")
fobj.write(tarinfo.tobuf())
fobj.close()
try:
# Test if it is still a directory entry when
# read back.
tar = tarfile.open(filename)
tarinfo = tar.getmembers()[0]
tar.close()
self.assert_(tarinfo.type == tarfile.DIRTYPE)
self.assert_(tarinfo.name.endswith("/"))
finally:
try:
os.unlink(filename)
except:
pass
def test_dirtype(self):
for tarinfo in self.tar:
if tarinfo.isdir():
self.assert_(tarinfo.name.endswith("/"))
self.assert_(not tarinfo.name[:-1].endswith("/"))
def test_extractall(self):
# Test if extractall() correctly restores directory permissions
# and times (see issue1735).
if sys.platform == "win32":
# Win32 has no support for utime() on directories or
# fine grained permissions.
return
fobj = StringIO.StringIO()
tar = tarfile.open(fileobj=fobj, mode="w:")
for name in ("foo", "foo/bar"):
tarinfo = tarfile.TarInfo(name)
tarinfo.type = tarfile.DIRTYPE
tarinfo.mtime = 07606136617
tarinfo.mode = 0755
tar.addfile(tarinfo)
tar.close()
fobj.seek(0)
TEMPDIR = os.path.join(dirname(), "extract-test")
tar = tarfile.open(fileobj=fobj)
tar.extractall(TEMPDIR)
for tarinfo in tar.getmembers():
path = os.path.join(TEMPDIR, tarinfo.name)
self.assertEqual(tarinfo.mode, os.stat(path).st_mode & 0777)
self.assertEqual(tarinfo.mtime, os.path.getmtime(path))
tar.close()
def test_star(self):
try:
self.tar.getmember("7-STAR")
except KeyError:
self.fail("finding 7-STAR member failed (mangled prefix?)")
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")
tar.close()
stream.close()
class ReadDetectTest(ReadTest):
def setUp(self):
self.tar = tarfile.open(tarname(self.comp), self.mode)
class ReadDetectFileobjTest(ReadTest):
def setUp(self):
name = tarname(self.comp)
self.tar = tarfile.open(name, mode=self.mode,
fileobj=open(name, "rb"))
class ReadAsteriskTest(ReadTest):
def setUp(self):
mode = self.mode + self.sep + "*"
self.tar = tarfile.open(tarname(self.comp), mode)
class ReadStreamAsteriskTest(ReadStreamTest):
def setUp(self):
mode = self.mode + self.sep + "*"
self.tar = tarfile.open(tarname(self.comp), mode)
class ReadFileobjTest(BaseTest):
def test_fileobj_with_offset(self):
# Skip the first member and store values from the second member
# of the testtar.
self.tar.next()
t = self.tar.next()
name = t.name
offset = t.offset
data = self.tar.extractfile(t).read()
self.tar.close()
# Open the testtar and seek to the offset of the second member.
if self.comp == "gz":
_open = gzip.GzipFile
elif self.comp == "bz2":
_open = bz2.BZ2File
else:
_open = open
fobj = _open(tarname(self.comp), "rb")
fobj.seek(offset)
# Test if the tarfile starts with the second member.
self.tar = tarfile.open(tarname(self.comp), "r:", fileobj=fobj)
t = self.tar.next()
self.assertEqual(t.name, name)
# Read to the end of fileobj and test if seeking back to the
# beginning works.
self.tar.getmembers()
self.assertEqual(self.tar.extractfile(t).read(), data,
"seek back did not work")
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 and "/" not in tarinfo.name:
self.assertRaises(ValueError, self.dst.addfile,
tarinfo, f)
else:
self.dst.addfile(tarinfo, f)
def test_add_self(self):
dstname = os.path.abspath(self.dstname)
self.assertEqual(self.dst.name, dstname, "archive name must be absolute")
self.dst.add(dstname)
self.assertEqual(self.dst.getnames(), [], "added the archive to itself")
cwd = os.getcwd()
os.chdir(dirname())
self.dst.add(dstname)
os.chdir(cwd)
self.assertEqual(self.dst.getnames(), [], "added the archive to itself")
class Write100Test(BaseTest):
# The name field in a tar header stores strings of at most 100 chars.
# If a string is shorter than 100 chars it has to be padded with '\0',
# which implies that a string of exactly 100 chars is stored without
# a trailing '\0'.
def setUp(self):
self.name = "01234567890123456789012345678901234567890123456789"
self.name += "01234567890123456789012345678901234567890123456789"
self.tar = tarfile.open(tmpname(), "w")
t = tarfile.TarInfo(self.name)
self.tar.addfile(t)
self.tar.close()
self.tar = tarfile.open(tmpname())
def tearDown(self):
self.tar.close()
def test(self):
self.assertEqual(self.tar.getnames()[0], self.name,
"failed to store 100 char filename")
class WriteSize0Test(BaseTest):
mode = 'w'
def setUp(self):
self.tmpdir = dirname()
self.dstname = tmpname()
self.dst = tarfile.open(self.dstname, "w")
def tearDown(self):
self.dst.close()
def test_file(self):
path = os.path.join(self.tmpdir, "file")
f = open(path, "w")
f.close()
tarinfo = self.dst.gettarinfo(path)
self.assertEqual(tarinfo.size, 0)
f = open(path, "w")
f.write("aaa")
f.close()
tarinfo = self.dst.gettarinfo(path)
self.assertEqual(tarinfo.size, 3)
def test_directory(self):
path = os.path.join(self.tmpdir, "directory")
if os.path.exists(path):
# This shouldn't be necessary, but is if a previous
# run was killed in mid-stream.
shutil.rmtree(path)
os.mkdir(path)
tarinfo = self.dst.gettarinfo(path)
self.assertEqual(tarinfo.size, 0)
def test_symlink(self):
if hasattr(os, "symlink"):
path = os.path.join(self.tmpdir, "symlink")
os.symlink("link_target", path)
tarinfo = self.dst.gettarinfo(path)
self.assertEqual(tarinfo.size, 0)
class WriteStreamTest(WriteTest):
sep = '|'
def test_padding(self):
self.dst.close()
if self.comp == "gz":
f = gzip.GzipFile(self.dstname)
s = f.read()
f.close()
elif self.comp == "bz2":
f = bz2.BZ2Decompressor()
s = file(self.dstname).read()
s = f.decompress(s)
self.assertEqual(len(f.unused_data), 0, "trailing data")
else:
f = file(self.dstname)
s = f.read()
f.close()
self.assertEqual(s.count("\0"), tarfile.RECORDSIZE,
"incorrect zero padding")
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 _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
tar = tarfile.open(tmpname(), "w")
tar.posix = False
tar.addfile(tarinfo)
v1 = self._calc_size(name, link)
v2 = tar.offset
self.assertEqual(v1, v2, "GNU longname/longlink creation failed")
tar.close()
tar = tarfile.open(tmpname())
member = tar.next()
self.failIf(member is None, "unable to read longname member")
self.assert_(tarinfo.name == member.name and \
tarinfo.linkname == member.linkname, \
"unable to read longname member")
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 ReadGNULongTest(unittest.TestCase):
def setUp(self):
self.tar = tarfile.open(tarname())
def tearDown(self):
self.tar.close()
def test_1471427(self):
"""Test reading of longname (bug #1471427).
"""
name = "test/" * 20 + "0-REGTYPE"
try:
tarinfo = self.tar.getmember(name)
except KeyError:
tarinfo = None
self.assert_(tarinfo is not None, "longname not found")
self.assert_(tarinfo.type != tarfile.DIRTYPE, "read longname as dirtype")
def test_read_name(self):
name = ("0-LONGNAME-" * 10)[:101]
try:
tarinfo = self.tar.getmember(name)
except KeyError:
tarinfo = None
self.assert_(tarinfo is not None, "longname not found")
def test_read_link(self):
link = ("1-LONGLINK-" * 10)[:101]
name = ("0-LONGNAME-" * 10)[:101]
try:
tarinfo = self.tar.getmember(link)
except KeyError:
tarinfo = None
self.assert_(tarinfo is not None, "longlink not found")
self.assert_(tarinfo.linkname == name, "linkname wrong")
def test_truncated_longname(self):
f = open(tarname())
fobj = StringIO.StringIO(f.read(1024))
f.close()
tar = tarfile.open(name="foo.tar", fileobj=fobj)
self.assert_(len(tar.getmembers()) == 0, "")
tar.close()
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")
class CreateHardlinkTest(BaseTest):
"""Test the creation of LNKTYPE (hardlink) members in an archive.
In this respect tarfile.py mimics the behaviour of GNU tar: If
a file has a st_nlink > 1, it will be added a REGTYPE member
only the first time.
"""
def setUp(self):
self.tar = tarfile.open(tmpname(), "w")
self.foo = os.path.join(dirname(), "foo")
self.bar = os.path.join(dirname(), "bar")
if os.path.exists(self.foo):
os.remove(self.foo)
if os.path.exists(self.bar):
os.remove(self.bar)
f = open(self.foo, "w")
f.write("foo")
f.close()
self.tar.add(self.foo)
def test_add_twice(self):
# If st_nlink == 1 then the same file will be added as
# REGTYPE every time.
tarinfo = self.tar.gettarinfo(self.foo)
self.assertEqual(tarinfo.type, tarfile.REGTYPE,
"add file as regular failed")
def test_add_hardlink(self):
# If st_nlink > 1 then the same file will be added as
# LNKTYPE.
os.link(self.foo, self.bar)
tarinfo = self.tar.gettarinfo(self.foo)
self.assertEqual(tarinfo.type, tarfile.LNKTYPE,
"add file as hardlink failed")
tarinfo = self.tar.gettarinfo(self.bar)
self.assertEqual(tarinfo.type, tarfile.LNKTYPE,
"add file as hardlink failed")
def test_dereference_hardlink(self):
self.tar.dereference = True
os.link(self.foo, self.bar)
tarinfo = self.tar.gettarinfo(self.bar)
self.assertEqual(tarinfo.type, tarfile.REGTYPE,
"dereferencing hardlink failed")
# Gzip TestCases
class ReadTestGzip(ReadTest):
comp = "gz"
class ReadStreamTestGzip(ReadStreamTest):
comp = "gz"
class WriteTestGzip(WriteTest):
comp = "gz"
class WriteStreamTestGzip(WriteStreamTest):
comp = "gz"
class ReadDetectTestGzip(ReadDetectTest):
comp = "gz"
class ReadDetectFileobjTestGzip(ReadDetectFileobjTest):
comp = "gz"
class ReadAsteriskTestGzip(ReadAsteriskTest):
comp = "gz"
class ReadStreamAsteriskTestGzip(ReadStreamAsteriskTest):
comp = "gz"
class ReadFileobjTestGzip(ReadFileobjTest):
comp = "gz"
# Filemode test cases
class FileModeTest(unittest.TestCase):
def test_modes(self):
self.assertEqual(tarfile.filemode(0755), '-rwxr-xr-x')
self.assertEqual(tarfile.filemode(07111), '---s--s--t')
class OpenFileobjTest(BaseTest):
def test_opener(self):
# Test for SF bug #1496501.
fobj = StringIO.StringIO("foo\n")
try:
tarfile.open("", mode="r", fileobj=fobj)
except tarfile.ReadError:
self.assertEqual(fobj.tell(), 0, "fileobj's position has moved")
def test_no_name_argument(self):
fobj = open(testtar, "rb")
tar = tarfile.open(fileobj=fobj, mode="r")
self.assertEqual(tar.name, os.path.abspath(fobj.name))
def test_no_name_attribute(self):
data = open(testtar, "rb").read()
fobj = StringIO.StringIO(data)
self.assertRaises(AttributeError, getattr, fobj, "name")
tar = tarfile.open(fileobj=fobj, mode="r")
self.assertEqual(tar.name, None)
def test_empty_name_attribute(self):
data = open(testtar, "rb").read()
fobj = StringIO.StringIO(data)
fobj.name = ""
tar = tarfile.open(fileobj=fobj, mode="r")
self.assertEqual(tar.name, None)
if bz2:
# Bzip2 TestCases
class ReadTestBzip2(ReadTestGzip):
comp = "bz2"
class ReadStreamTestBzip2(ReadStreamTestGzip):
comp = "bz2"
class WriteTestBzip2(WriteTest):
comp = "bz2"
class WriteStreamTestBzip2(WriteStreamTestGzip):
comp = "bz2"
class ReadDetectTestBzip2(ReadDetectTest):
comp = "bz2"
class ReadDetectFileobjTestBzip2(ReadDetectFileobjTest):
comp = "bz2"
class ReadAsteriskTestBzip2(ReadAsteriskTest):
comp = "bz2"
class ReadStreamAsteriskTestBzip2(ReadStreamAsteriskTest):
comp = "bz2"
class ReadFileobjTestBzip2(ReadFileobjTest):
comp = "bz2"
class PartialReadTestBzip2(unittest.TestCase):
# Issue5068: The _BZ2Proxy.read() method loops forever
# on an empty or partial bzipped file.
def _test_partial_input(self, mode):
class MyStringIO(StringIO.StringIO):
hit_eof = False
def read(self, n):
if self.hit_eof:
raise AssertionError("infinite loop detected in tarfile.open()")
self.hit_eof = self.pos == self.len
return StringIO.StringIO.read(self, n)
data = bz2.compress(tarfile.TarInfo("foo").tobuf())
for x in range(len(data) + 1):
tarfile.open(fileobj=MyStringIO(data[:x]), mode=mode)
def test_partial_input(self):
self._test_partial_input("r")
def test_partial_input_bz2(self):
self._test_partial_input("r:bz2")
# If importing gzip failed, discard the Gzip TestCases.
if not gzip:
del ReadTestGzip
del ReadStreamTestGzip
del WriteTestGzip
del WriteStreamTestGzip
def test_main():
# Create archive.
f = open(tarname(), "rb")
fguts = f.read()
f.close()
if gzip:
# create testtar.tar.gz
tar = gzip.open(tarname("gz"), "wb")
tar.write(fguts)
tar.close()
if bz2:
# create testtar.tar.bz2
tar = bz2.BZ2File(tarname("bz2"), "wb")
tar.write(fguts)
tar.close()
tests = [
FileModeTest,
OpenFileobjTest,
ReadTest,
ReadStreamTest,
ReadDetectTest,
ReadDetectFileobjTest,
ReadAsteriskTest,
ReadStreamAsteriskTest,
ReadFileobjTest,
WriteTest,
Write100Test,
WriteSize0Test,
WriteStreamTest,
WriteGNULongTest,
ReadGNULongTest,
]
if hasattr(os, "link"):
tests.append(ExtractHardlinkTest)
tests.append(CreateHardlinkTest)
if gzip:
tests.extend([
ReadTestGzip, ReadStreamTestGzip,
WriteTestGzip, WriteStreamTestGzip,
ReadDetectTestGzip, ReadDetectFileobjTestGzip,
ReadAsteriskTestGzip, ReadStreamAsteriskTestGzip,
ReadFileobjTestGzip
])
if bz2:
tests.extend([
ReadTestBzip2, ReadStreamTestBzip2,
WriteTestBzip2, WriteStreamTestBzip2,
ReadDetectTestBzip2, ReadDetectFileobjTestBzip2,
ReadAsteriskTestBzip2, ReadStreamAsteriskTestBzip2,
ReadFileobjTestBzip2, PartialReadTestBzip2
])
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()