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cpython/Lib/test/test_os.py

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# As a test suite for the os module, this is woefully inadequate, but this
# does add tests for a few functions which have been determined to be more
# portable than they had been thought to be.
import os
import errno
import unittest
import warnings
import sys
import signal
import subprocess
import time
import shutil
from test import support
import contextlib
import mmap
import platform
import re
import uuid
import asyncore
import asynchat
import socket
import itertools
import stat
import locale
import codecs
try:
import threading
except ImportError:
threading = None
from test.script_helper import assert_python_ok
with warnings.catch_warnings():
warnings.simplefilter("ignore", DeprecationWarning)
os.stat_float_times(True)
st = os.stat(__file__)
stat_supports_subsecond = (
# check if float and int timestamps are different
(st.st_atime != st[7])
or (st.st_mtime != st[8])
or (st.st_ctime != st[9]))
# Detect whether we're on a Linux system that uses the (now outdated
# and unmaintained) linuxthreads threading library. There's an issue
# when combining linuxthreads with a failed execv call: see
# http://bugs.python.org/issue4970.
if hasattr(sys, 'thread_info') and sys.thread_info.version:
USING_LINUXTHREADS = sys.thread_info.version.startswith("linuxthreads")
else:
USING_LINUXTHREADS = False
# Tests creating TESTFN
class FileTests(unittest.TestCase):
def setUp(self):
if os.path.exists(support.TESTFN):
os.unlink(support.TESTFN)
tearDown = setUp
def test_access(self):
f = os.open(support.TESTFN, os.O_CREAT|os.O_RDWR)
os.close(f)
self.assertTrue(os.access(support.TESTFN, os.W_OK))
def test_closerange(self):
first = os.open(support.TESTFN, os.O_CREAT|os.O_RDWR)
# We must allocate two consecutive file descriptors, otherwise
# it will mess up other file descriptors (perhaps even the three
# standard ones).
second = os.dup(first)
try:
retries = 0
while second != first + 1:
os.close(first)
retries += 1
if retries > 10:
# XXX test skipped
self.skipTest("couldn't allocate two consecutive fds")
first, second = second, os.dup(second)
finally:
os.close(second)
# close a fd that is open, and one that isn't
os.closerange(first, first + 2)
self.assertRaises(OSError, os.write, first, b"a")
@support.cpython_only
def test_rename(self):
path = support.TESTFN
old = sys.getrefcount(path)
self.assertRaises(TypeError, os.rename, path, 0)
new = sys.getrefcount(path)
self.assertEqual(old, new)
def test_read(self):
with open(support.TESTFN, "w+b") as fobj:
fobj.write(b"spam")
fobj.flush()
fd = fobj.fileno()
os.lseek(fd, 0, 0)
s = os.read(fd, 4)
self.assertEqual(type(s), bytes)
self.assertEqual(s, b"spam")
def test_write(self):
# os.write() accepts bytes- and buffer-like objects but not strings
fd = os.open(support.TESTFN, os.O_CREAT | os.O_WRONLY)
self.assertRaises(TypeError, os.write, fd, "beans")
os.write(fd, b"bacon\n")
os.write(fd, bytearray(b"eggs\n"))
os.write(fd, memoryview(b"spam\n"))
os.close(fd)
with open(support.TESTFN, "rb") as fobj:
self.assertEqual(fobj.read().splitlines(),
[b"bacon", b"eggs", b"spam"])
def write_windows_console(self, *args):
retcode = subprocess.call(args,
# use a new console to not flood the test output
creationflags=subprocess.CREATE_NEW_CONSOLE,
# use a shell to hide the console window (SW_HIDE)
shell=True)
self.assertEqual(retcode, 0)
@unittest.skipUnless(sys.platform == 'win32',
'test specific to the Windows console')
def test_write_windows_console(self):
# Issue #11395: the Windows console returns an error (12: not enough
# space error) on writing into stdout if stdout mode is binary and the
# length is greater than 66,000 bytes (or less, depending on heap
# usage).
code = "print('x' * 100000)"
self.write_windows_console(sys.executable, "-c", code)
self.write_windows_console(sys.executable, "-u", "-c", code)
def fdopen_helper(self, *args):
fd = os.open(support.TESTFN, os.O_RDONLY)
f = os.fdopen(fd, *args)
f.close()
def test_fdopen(self):
fd = os.open(support.TESTFN, os.O_CREAT|os.O_RDWR)
os.close(fd)
self.fdopen_helper()
self.fdopen_helper('r')
self.fdopen_helper('r', 100)
def test_replace(self):
TESTFN2 = support.TESTFN + ".2"
with open(support.TESTFN, 'w') as f:
f.write("1")
with open(TESTFN2, 'w') as f:
f.write("2")
self.addCleanup(os.unlink, TESTFN2)
os.replace(support.TESTFN, TESTFN2)
self.assertRaises(FileNotFoundError, os.stat, support.TESTFN)
with open(TESTFN2, 'r') as f:
self.assertEqual(f.read(), "1")
# Test attributes on return values from os.*stat* family.
class StatAttributeTests(unittest.TestCase):
def setUp(self):
os.mkdir(support.TESTFN)
self.fname = os.path.join(support.TESTFN, "f1")
f = open(self.fname, 'wb')
f.write(b"ABC")
f.close()
def tearDown(self):
os.unlink(self.fname)
os.rmdir(support.TESTFN)
def check_stat_attributes(self, fname):
if not hasattr(os, "stat"):
return
result = os.stat(fname)
# Make sure direct access works
self.assertEqual(result[stat.ST_SIZE], 3)
self.assertEqual(result.st_size, 3)
# Make sure all the attributes are there
members = dir(result)
for name in dir(stat):
if name[:3] == 'ST_':
attr = name.lower()
if name.endswith("TIME"):
def trunc(x): return int(x)
else:
def trunc(x): return x
self.assertEqual(trunc(getattr(result, attr)),
result[getattr(stat, name)])
self.assertIn(attr, members)
# Make sure that the st_?time and st_?time_ns fields roughly agree
# (they should always agree up to around tens-of-microseconds)
for name in 'st_atime st_mtime st_ctime'.split():
floaty = int(getattr(result, name) * 100000)
nanosecondy = getattr(result, name + "_ns") // 10000
self.assertAlmostEqual(floaty, nanosecondy, delta=2)
try:
result[200]
self.fail("No exception raised")
except IndexError:
pass
# Make sure that assignment fails
try:
result.st_mode = 1
self.fail("No exception raised")
except AttributeError:
pass
try:
result.st_rdev = 1
self.fail("No exception raised")
except (AttributeError, TypeError):
pass
try:
result.parrot = 1
self.fail("No exception raised")
except AttributeError:
pass
# Use the stat_result constructor with a too-short tuple.
try:
result2 = os.stat_result((10,))
self.fail("No exception raised")
except TypeError:
pass
# Use the constructor with a too-long tuple.
try:
result2 = os.stat_result((0,1,2,3,4,5,6,7,8,9,10,11,12,13,14))
except TypeError:
pass
def test_stat_attributes(self):
self.check_stat_attributes(self.fname)
def test_stat_attributes_bytes(self):
try:
fname = self.fname.encode(sys.getfilesystemencoding())
except UnicodeEncodeError:
self.skipTest("cannot encode %a for the filesystem" % self.fname)
with warnings.catch_warnings():
warnings.simplefilter("ignore", DeprecationWarning)
self.check_stat_attributes(fname)
def test_statvfs_attributes(self):
if not hasattr(os, "statvfs"):
return
try:
result = os.statvfs(self.fname)
except OSError as e:
# On AtheOS, glibc always returns ENOSYS
if e.errno == errno.ENOSYS:
return
# Make sure direct access works
self.assertEqual(result.f_bfree, result[3])
# Make sure all the attributes are there.
members = ('bsize', 'frsize', 'blocks', 'bfree', 'bavail', 'files',
'ffree', 'favail', 'flag', 'namemax')
for value, member in enumerate(members):
self.assertEqual(getattr(result, 'f_' + member), result[value])
# Make sure that assignment really fails
try:
result.f_bfree = 1
self.fail("No exception raised")
except AttributeError:
pass
try:
result.parrot = 1
self.fail("No exception raised")
except AttributeError:
pass
# Use the constructor with a too-short tuple.
try:
result2 = os.statvfs_result((10,))
self.fail("No exception raised")
except TypeError:
pass
# Use the constructor with a too-long tuple.
try:
result2 = os.statvfs_result((0,1,2,3,4,5,6,7,8,9,10,11,12,13,14))
except TypeError:
pass
def test_utime_dir(self):
delta = 1000000
st = os.stat(support.TESTFN)
# round to int, because some systems may support sub-second
# time stamps in stat, but not in utime.
os.utime(support.TESTFN, (st.st_atime, int(st.st_mtime-delta)))
st2 = os.stat(support.TESTFN)
self.assertEqual(st2.st_mtime, int(st.st_mtime-delta))
def _test_utime(self, filename, attr, utime, delta):
# Issue #13327 removed the requirement to pass None as the
# second argument. Check that the previous methods of passing
# a time tuple or None work in addition to no argument.
st0 = os.stat(filename)
# Doesn't set anything new, but sets the time tuple way
utime(filename, (attr(st0, "st_atime"), attr(st0, "st_mtime")))
# Setting the time to the time you just read, then reading again,
# should always return exactly the same times.
st1 = os.stat(filename)
self.assertEqual(attr(st0, "st_mtime"), attr(st1, "st_mtime"))
self.assertEqual(attr(st0, "st_atime"), attr(st1, "st_atime"))
# Set to the current time in the old explicit way.
os.utime(filename, None)
st2 = os.stat(support.TESTFN)
# Set to the current time in the new way
os.utime(filename)
st3 = os.stat(filename)
self.assertAlmostEqual(attr(st2, "st_mtime"), attr(st3, "st_mtime"), delta=delta)
def test_utime(self):
def utime(file, times):
return os.utime(file, times)
self._test_utime(self.fname, getattr, utime, 10)
self._test_utime(support.TESTFN, getattr, utime, 10)
def _test_utime_ns(self, set_times_ns, test_dir=True):
def getattr_ns(o, attr):
return getattr(o, attr + "_ns")
ten_s = 10 * 1000 * 1000 * 1000
self._test_utime(self.fname, getattr_ns, set_times_ns, ten_s)
if test_dir:
self._test_utime(support.TESTFN, getattr_ns, set_times_ns, ten_s)
def test_utime_ns(self):
def utime_ns(file, times):
return os.utime(file, ns=times)
self._test_utime_ns(utime_ns)
requires_utime_dir_fd = unittest.skipUnless(
os.utime in os.supports_dir_fd,
"dir_fd support for utime required for this test.")
requires_utime_fd = unittest.skipUnless(
os.utime in os.supports_fd,
"fd support for utime required for this test.")
requires_utime_nofollow_symlinks = unittest.skipUnless(
os.utime in os.supports_follow_symlinks,
"follow_symlinks support for utime required for this test.")
@requires_utime_nofollow_symlinks
def test_lutimes_ns(self):
def lutimes_ns(file, times):
return os.utime(file, ns=times, follow_symlinks=False)
self._test_utime_ns(lutimes_ns)
@requires_utime_fd
def test_futimes_ns(self):
def futimes_ns(file, times):
with open(file, "wb") as f:
os.utime(f.fileno(), ns=times)
self._test_utime_ns(futimes_ns, test_dir=False)
def _utime_invalid_arguments(self, name, arg):
with self.assertRaises(ValueError):
getattr(os, name)(arg, (5, 5), ns=(5, 5))
def test_utime_invalid_arguments(self):
self._utime_invalid_arguments('utime', self.fname)
@unittest.skipUnless(stat_supports_subsecond,
"os.stat() doesn't has a subsecond resolution")
def _test_utime_subsecond(self, set_time_func):
asec, amsec = 1, 901
atime = asec + amsec * 1e-3
msec, mmsec = 2, 901
mtime = msec + mmsec * 1e-3
filename = self.fname
os.utime(filename, (0, 0))
set_time_func(filename, atime, mtime)
with warnings.catch_warnings():
warnings.simplefilter("ignore", DeprecationWarning)
os.stat_float_times(True)
st = os.stat(filename)
self.assertAlmostEqual(st.st_atime, atime, places=3)
self.assertAlmostEqual(st.st_mtime, mtime, places=3)
def test_utime_subsecond(self):
def set_time(filename, atime, mtime):
os.utime(filename, (atime, mtime))
self._test_utime_subsecond(set_time)
@requires_utime_fd
def test_futimes_subsecond(self):
def set_time(filename, atime, mtime):
with open(filename, "wb") as f:
os.utime(f.fileno(), times=(atime, mtime))
self._test_utime_subsecond(set_time)
@requires_utime_fd
def test_futimens_subsecond(self):
def set_time(filename, atime, mtime):
with open(filename, "wb") as f:
os.utime(f.fileno(), times=(atime, mtime))
self._test_utime_subsecond(set_time)
@requires_utime_dir_fd
def test_futimesat_subsecond(self):
def set_time(filename, atime, mtime):
dirname = os.path.dirname(filename)
dirfd = os.open(dirname, os.O_RDONLY)
try:
os.utime(os.path.basename(filename), dir_fd=dirfd,
times=(atime, mtime))
finally:
os.close(dirfd)
self._test_utime_subsecond(set_time)
@requires_utime_nofollow_symlinks
def test_lutimes_subsecond(self):
def set_time(filename, atime, mtime):
os.utime(filename, (atime, mtime), follow_symlinks=False)
self._test_utime_subsecond(set_time)
@requires_utime_dir_fd
def test_utimensat_subsecond(self):
def set_time(filename, atime, mtime):
dirname = os.path.dirname(filename)
dirfd = os.open(dirname, os.O_RDONLY)
try:
os.utime(os.path.basename(filename), dir_fd=dirfd,
times=(atime, mtime))
finally:
os.close(dirfd)
self._test_utime_subsecond(set_time)
# Restrict test to Win32, since there is no guarantee other
# systems support centiseconds
if sys.platform == 'win32':
def get_file_system(path):
root = os.path.splitdrive(os.path.abspath(path))[0] + '\\'
import ctypes
kernel32 = ctypes.windll.kernel32
buf = ctypes.create_unicode_buffer("", 100)
if kernel32.GetVolumeInformationW(root, None, 0, None, None, None, buf, len(buf)):
return buf.value
if get_file_system(support.TESTFN) == "NTFS":
def test_1565150(self):
t1 = 1159195039.25
os.utime(self.fname, (t1, t1))
self.assertEqual(os.stat(self.fname).st_mtime, t1)
def test_large_time(self):
t1 = 5000000000 # some day in 2128
os.utime(self.fname, (t1, t1))
self.assertEqual(os.stat(self.fname).st_mtime, t1)
def test_1686475(self):
# Verify that an open file can be stat'ed
try:
os.stat(r"c:\pagefile.sys")
except FileNotFoundError:
pass # file does not exist; cannot run test
except OSError as e:
self.fail("Could not stat pagefile.sys")
@unittest.skipUnless(hasattr(os, "pipe"), "requires os.pipe()")
def test_15261(self):
# Verify that stat'ing a closed fd does not cause crash
r, w = os.pipe()
try:
os.stat(r) # should not raise error
finally:
os.close(r)
os.close(w)
with self.assertRaises(OSError) as ctx:
os.stat(r)
self.assertEqual(ctx.exception.errno, errno.EBADF)
from test import mapping_tests
class EnvironTests(mapping_tests.BasicTestMappingProtocol):
"""check that os.environ object conform to mapping protocol"""
type2test = None
def setUp(self):
self.__save = dict(os.environ)
if os.supports_bytes_environ:
self.__saveb = dict(os.environb)
for key, value in self._reference().items():
os.environ[key] = value
def tearDown(self):
os.environ.clear()
os.environ.update(self.__save)
if os.supports_bytes_environ:
os.environb.clear()
os.environb.update(self.__saveb)
def _reference(self):
return {"KEY1":"VALUE1", "KEY2":"VALUE2", "KEY3":"VALUE3"}
def _empty_mapping(self):
os.environ.clear()
return os.environ
# Bug 1110478
@unittest.skipUnless(os.path.exists('/bin/sh'), 'requires /bin/sh')
def test_update2(self):
os.environ.clear()
os.environ.update(HELLO="World")
with os.popen("/bin/sh -c 'echo $HELLO'") as popen:
value = popen.read().strip()
self.assertEqual(value, "World")
@unittest.skipUnless(os.path.exists('/bin/sh'), 'requires /bin/sh')
def test_os_popen_iter(self):
with os.popen(
"/bin/sh -c 'echo \"line1\nline2\nline3\"'") as popen:
it = iter(popen)
self.assertEqual(next(it), "line1\n")
self.assertEqual(next(it), "line2\n")
self.assertEqual(next(it), "line3\n")
self.assertRaises(StopIteration, next, it)
# Verify environ keys and values from the OS are of the
# correct str type.
def test_keyvalue_types(self):
for key, val in os.environ.items():
self.assertEqual(type(key), str)
self.assertEqual(type(val), str)
def test_items(self):
for key, value in self._reference().items():
self.assertEqual(os.environ.get(key), value)
# Issue 7310
def test___repr__(self):
"""Check that the repr() of os.environ looks like environ({...})."""
env = os.environ
self.assertEqual(repr(env), 'environ({{{}}})'.format(', '.join(
'{!r}: {!r}'.format(key, value)
for key, value in env.items())))
def test_get_exec_path(self):
defpath_list = os.defpath.split(os.pathsep)
test_path = ['/monty', '/python', '', '/flying/circus']
test_env = {'PATH': os.pathsep.join(test_path)}
saved_environ = os.environ
try:
os.environ = dict(test_env)
# Test that defaulting to os.environ works.
self.assertSequenceEqual(test_path, os.get_exec_path())
self.assertSequenceEqual(test_path, os.get_exec_path(env=None))
finally:
os.environ = saved_environ
# No PATH environment variable
self.assertSequenceEqual(defpath_list, os.get_exec_path({}))
# Empty PATH environment variable
self.assertSequenceEqual(('',), os.get_exec_path({'PATH':''}))
# Supplied PATH environment variable
self.assertSequenceEqual(test_path, os.get_exec_path(test_env))
if os.supports_bytes_environ:
# env cannot contain 'PATH' and b'PATH' keys
try:
# ignore BytesWarning warning
with warnings.catch_warnings(record=True):
mixed_env = {'PATH': '1', b'PATH': b'2'}
except BytesWarning:
# mixed_env cannot be created with python -bb
pass
else:
self.assertRaises(ValueError, os.get_exec_path, mixed_env)
# bytes key and/or value
self.assertSequenceEqual(os.get_exec_path({b'PATH': b'abc'}),
['abc'])
self.assertSequenceEqual(os.get_exec_path({b'PATH': 'abc'}),
['abc'])
self.assertSequenceEqual(os.get_exec_path({'PATH': b'abc'}),
['abc'])
@unittest.skipUnless(os.supports_bytes_environ,
"os.environb required for this test.")
def test_environb(self):
# os.environ -> os.environb
value = 'euro\u20ac'
try:
value_bytes = value.encode(sys.getfilesystemencoding(),
'surrogateescape')
except UnicodeEncodeError:
msg = "U+20AC character is not encodable to %s" % (
sys.getfilesystemencoding(),)
self.skipTest(msg)
os.environ['unicode'] = value
self.assertEqual(os.environ['unicode'], value)
self.assertEqual(os.environb[b'unicode'], value_bytes)
# os.environb -> os.environ
value = b'\xff'
os.environb[b'bytes'] = value
self.assertEqual(os.environb[b'bytes'], value)
value_str = value.decode(sys.getfilesystemencoding(), 'surrogateescape')
self.assertEqual(os.environ['bytes'], value_str)
# On FreeBSD < 7 and OS X < 10.6, unsetenv() doesn't return a value (issue
# #13415).
@support.requires_freebsd_version(7)
@support.requires_mac_ver(10, 6)
def test_unset_error(self):
if sys.platform == "win32":
# an environment variable is limited to 32,767 characters
key = 'x' * 50000
self.assertRaises(ValueError, os.environ.__delitem__, key)
else:
# "=" is not allowed in a variable name
key = 'key='
self.assertRaises(OSError, os.environ.__delitem__, key)
class WalkTests(unittest.TestCase):
"""Tests for os.walk()."""
def setUp(self):
import os
from os.path import join
# Build:
# TESTFN/
# TEST1/ a file kid and two directory kids
# tmp1
# SUB1/ a file kid and a directory kid
# tmp2
# SUB11/ no kids
# SUB2/ a file kid and a dirsymlink kid
# tmp3
# link/ a symlink to TESTFN.2
# broken_link
# TEST2/
# tmp4 a lone file
walk_path = join(support.TESTFN, "TEST1")
sub1_path = join(walk_path, "SUB1")
sub11_path = join(sub1_path, "SUB11")
sub2_path = join(walk_path, "SUB2")
tmp1_path = join(walk_path, "tmp1")
tmp2_path = join(sub1_path, "tmp2")
tmp3_path = join(sub2_path, "tmp3")
link_path = join(sub2_path, "link")
t2_path = join(support.TESTFN, "TEST2")
tmp4_path = join(support.TESTFN, "TEST2", "tmp4")
link_path = join(sub2_path, "link")
broken_link_path = join(sub2_path, "broken_link")
# Create stuff.
os.makedirs(sub11_path)
os.makedirs(sub2_path)
os.makedirs(t2_path)
for path in tmp1_path, tmp2_path, tmp3_path, tmp4_path:
f = open(path, "w")
f.write("I'm " + path + " and proud of it. Blame test_os.\n")
f.close()
if support.can_symlink():
if os.name == 'nt':
def symlink_to_dir(src, dest):
os.symlink(src, dest, True)
else:
symlink_to_dir = os.symlink
symlink_to_dir(os.path.abspath(t2_path), link_path)
symlink_to_dir('broken', broken_link_path)
sub2_tree = (sub2_path, ["link"], ["broken_link", "tmp3"])
else:
sub2_tree = (sub2_path, [], ["tmp3"])
# Walk top-down.
all = list(os.walk(walk_path))
self.assertEqual(len(all), 4)
# We can't know which order SUB1 and SUB2 will appear in.
# Not flipped: TESTFN, SUB1, SUB11, SUB2
# flipped: TESTFN, SUB2, SUB1, SUB11
flipped = all[0][1][0] != "SUB1"
all[0][1].sort()
all[3 - 2 * flipped][-1].sort()
self.assertEqual(all[0], (walk_path, ["SUB1", "SUB2"], ["tmp1"]))
self.assertEqual(all[1 + flipped], (sub1_path, ["SUB11"], ["tmp2"]))
self.assertEqual(all[2 + flipped], (sub11_path, [], []))
self.assertEqual(all[3 - 2 * flipped], sub2_tree)
# Prune the search.
all = []
for root, dirs, files in os.walk(walk_path):
all.append((root, dirs, files))
# Don't descend into SUB1.
if 'SUB1' in dirs:
# Note that this also mutates the dirs we appended to all!
dirs.remove('SUB1')
self.assertEqual(len(all), 2)
self.assertEqual(all[0], (walk_path, ["SUB2"], ["tmp1"]))
all[1][-1].sort()
self.assertEqual(all[1], sub2_tree)
# Walk bottom-up.
all = list(os.walk(walk_path, topdown=False))
self.assertEqual(len(all), 4)
# We can't know which order SUB1 and SUB2 will appear in.
# Not flipped: SUB11, SUB1, SUB2, TESTFN
# flipped: SUB2, SUB11, SUB1, TESTFN
flipped = all[3][1][0] != "SUB1"
all[3][1].sort()
all[2 - 2 * flipped][-1].sort()
self.assertEqual(all[3], (walk_path, ["SUB1", "SUB2"], ["tmp1"]))
self.assertEqual(all[flipped], (sub11_path, [], []))
self.assertEqual(all[flipped + 1], (sub1_path, ["SUB11"], ["tmp2"]))
self.assertEqual(all[2 - 2 * flipped], sub2_tree)
if support.can_symlink():
# Walk, following symlinks.
for root, dirs, files in os.walk(walk_path, followlinks=True):
if root == link_path:
self.assertEqual(dirs, [])
self.assertEqual(files, ["tmp4"])
break
else:
self.fail("Didn't follow symlink with followlinks=True")
def tearDown(self):
# Tear everything down. This is a decent use for bottom-up on
# Windows, which doesn't have a recursive delete command. The
# (not so) subtlety is that rmdir will fail unless the dir's
# kids are removed first, so bottom up is essential.
for root, dirs, files in os.walk(support.TESTFN, topdown=False):
for name in files:
os.remove(os.path.join(root, name))
for name in dirs:
dirname = os.path.join(root, name)
if not os.path.islink(dirname):
os.rmdir(dirname)
else:
os.remove(dirname)
os.rmdir(support.TESTFN)
@unittest.skipUnless(hasattr(os, 'fwalk'), "Test needs os.fwalk()")
class FwalkTests(WalkTests):
"""Tests for os.fwalk()."""
def _compare_to_walk(self, walk_kwargs, fwalk_kwargs):
"""
compare with walk() results.
"""
walk_kwargs = walk_kwargs.copy()
fwalk_kwargs = fwalk_kwargs.copy()
for topdown, follow_symlinks in itertools.product((True, False), repeat=2):
walk_kwargs.update(topdown=topdown, followlinks=follow_symlinks)
fwalk_kwargs.update(topdown=topdown, follow_symlinks=follow_symlinks)
expected = {}
for root, dirs, files in os.walk(**walk_kwargs):
expected[root] = (set(dirs), set(files))
for root, dirs, files, rootfd in os.fwalk(**fwalk_kwargs):
self.assertIn(root, expected)
self.assertEqual(expected[root], (set(dirs), set(files)))
def test_compare_to_walk(self):
kwargs = {'top': support.TESTFN}
self._compare_to_walk(kwargs, kwargs)
def test_dir_fd(self):
try:
fd = os.open(".", os.O_RDONLY)
walk_kwargs = {'top': support.TESTFN}
fwalk_kwargs = walk_kwargs.copy()
fwalk_kwargs['dir_fd'] = fd
self._compare_to_walk(walk_kwargs, fwalk_kwargs)
finally:
os.close(fd)
def test_yields_correct_dir_fd(self):
# check returned file descriptors
for topdown, follow_symlinks in itertools.product((True, False), repeat=2):
args = support.TESTFN, topdown, None
for root, dirs, files, rootfd in os.fwalk(*args, follow_symlinks=follow_symlinks):
# check that the FD is valid
os.fstat(rootfd)
# redundant check
os.stat(rootfd)
# check that listdir() returns consistent information
self.assertEqual(set(os.listdir(rootfd)), set(dirs) | set(files))
def test_fd_leak(self):
# Since we're opening a lot of FDs, we must be careful to avoid leaks:
# we both check that calling fwalk() a large number of times doesn't
# yield EMFILE, and that the minimum allocated FD hasn't changed.
minfd = os.dup(1)
os.close(minfd)
for i in range(256):
for x in os.fwalk(support.TESTFN):
pass
newfd = os.dup(1)
self.addCleanup(os.close, newfd)
self.assertEqual(newfd, minfd)
def tearDown(self):
# cleanup
for root, dirs, files, rootfd in os.fwalk(support.TESTFN, topdown=False):
for name in files:
os.unlink(name, dir_fd=rootfd)
for name in dirs:
st = os.stat(name, dir_fd=rootfd, follow_symlinks=False)
if stat.S_ISDIR(st.st_mode):
os.rmdir(name, dir_fd=rootfd)
else:
os.unlink(name, dir_fd=rootfd)
os.rmdir(support.TESTFN)
class MakedirTests(unittest.TestCase):
def setUp(self):
os.mkdir(support.TESTFN)
def test_makedir(self):
base = support.TESTFN
path = os.path.join(base, 'dir1', 'dir2', 'dir3')
os.makedirs(path) # Should work
path = os.path.join(base, 'dir1', 'dir2', 'dir3', 'dir4')
os.makedirs(path)
# Try paths with a '.' in them
self.assertRaises(OSError, os.makedirs, os.curdir)
path = os.path.join(base, 'dir1', 'dir2', 'dir3', 'dir4', 'dir5', os.curdir)
os.makedirs(path)
path = os.path.join(base, 'dir1', os.curdir, 'dir2', 'dir3', 'dir4',
'dir5', 'dir6')
os.makedirs(path)
def test_exist_ok_existing_directory(self):
path = os.path.join(support.TESTFN, 'dir1')
mode = 0o777
old_mask = os.umask(0o022)
os.makedirs(path, mode)
self.assertRaises(OSError, os.makedirs, path, mode)
self.assertRaises(OSError, os.makedirs, path, mode, exist_ok=False)
self.assertRaises(OSError, os.makedirs, path, 0o776, exist_ok=True)
os.makedirs(path, mode=mode, exist_ok=True)
os.umask(old_mask)
def test_exist_ok_s_isgid_directory(self):
path = os.path.join(support.TESTFN, 'dir1')
S_ISGID = stat.S_ISGID
mode = 0o777
old_mask = os.umask(0o022)
try:
existing_testfn_mode = stat.S_IMODE(
os.lstat(support.TESTFN).st_mode)
try:
os.chmod(support.TESTFN, existing_testfn_mode | S_ISGID)
except PermissionError:
raise unittest.SkipTest('Cannot set S_ISGID for dir.')
if (os.lstat(support.TESTFN).st_mode & S_ISGID != S_ISGID):
raise unittest.SkipTest('No support for S_ISGID dir mode.')
# The os should apply S_ISGID from the parent dir for us, but
# this test need not depend on that behavior. Be explicit.
os.makedirs(path, mode | S_ISGID)
# http://bugs.python.org/issue14992
# Should not fail when the bit is already set.
os.makedirs(path, mode, exist_ok=True)
# remove the bit.
os.chmod(path, stat.S_IMODE(os.lstat(path).st_mode) & ~S_ISGID)
with self.assertRaises(OSError):
# Should fail when the bit is not already set when demanded.
os.makedirs(path, mode | S_ISGID, exist_ok=True)
finally:
os.umask(old_mask)
def test_exist_ok_existing_regular_file(self):
base = support.TESTFN
path = os.path.join(support.TESTFN, 'dir1')
f = open(path, 'w')
f.write('abc')
f.close()
self.assertRaises(OSError, os.makedirs, path)
self.assertRaises(OSError, os.makedirs, path, exist_ok=False)
self.assertRaises(OSError, os.makedirs, path, exist_ok=True)
os.remove(path)
def tearDown(self):
path = os.path.join(support.TESTFN, 'dir1', 'dir2', 'dir3',
'dir4', 'dir5', 'dir6')
# If the tests failed, the bottom-most directory ('../dir6')
# may not have been created, so we look for the outermost directory
# that exists.
while not os.path.exists(path) and path != support.TESTFN:
path = os.path.dirname(path)
os.removedirs(path)
class RemoveDirsTests(unittest.TestCase):
def setUp(self):
os.makedirs(support.TESTFN)
def tearDown(self):
support.rmtree(support.TESTFN)
def test_remove_all(self):
dira = os.path.join(support.TESTFN, 'dira')
os.mkdir(dira)
dirb = os.path.join(dira, 'dirb')
os.mkdir(dirb)
os.removedirs(dirb)
self.assertFalse(os.path.exists(dirb))
self.assertFalse(os.path.exists(dira))
self.assertFalse(os.path.exists(support.TESTFN))
def test_remove_partial(self):
dira = os.path.join(support.TESTFN, 'dira')
os.mkdir(dira)
dirb = os.path.join(dira, 'dirb')
os.mkdir(dirb)
with open(os.path.join(dira, 'file.txt'), 'w') as f:
f.write('text')
os.removedirs(dirb)
self.assertFalse(os.path.exists(dirb))
self.assertTrue(os.path.exists(dira))
self.assertTrue(os.path.exists(support.TESTFN))
def test_remove_nothing(self):
dira = os.path.join(support.TESTFN, 'dira')
os.mkdir(dira)
dirb = os.path.join(dira, 'dirb')
os.mkdir(dirb)
with open(os.path.join(dirb, 'file.txt'), 'w') as f:
f.write('text')
with self.assertRaises(OSError):
os.removedirs(dirb)
self.assertTrue(os.path.exists(dirb))
self.assertTrue(os.path.exists(dira))
self.assertTrue(os.path.exists(support.TESTFN))
class DevNullTests(unittest.TestCase):
def test_devnull(self):
with open(os.devnull, 'wb') as f:
f.write(b'hello')
f.close()
with open(os.devnull, 'rb') as f:
self.assertEqual(f.read(), b'')
class URandomTests(unittest.TestCase):
def test_urandom_length(self):
self.assertEqual(len(os.urandom(0)), 0)
self.assertEqual(len(os.urandom(1)), 1)
self.assertEqual(len(os.urandom(10)), 10)
self.assertEqual(len(os.urandom(100)), 100)
self.assertEqual(len(os.urandom(1000)), 1000)
def test_urandom_value(self):
data1 = os.urandom(16)
data2 = os.urandom(16)
self.assertNotEqual(data1, data2)
def get_urandom_subprocess(self, count):
code = '\n'.join((
'import os, sys',
'data = os.urandom(%s)' % count,
'sys.stdout.buffer.write(data)',
'sys.stdout.buffer.flush()'))
out = assert_python_ok('-c', code)
stdout = out[1]
self.assertEqual(len(stdout), 16)
return stdout
def test_urandom_subprocess(self):
data1 = self.get_urandom_subprocess(16)
data2 = self.get_urandom_subprocess(16)
self.assertNotEqual(data1, data2)
@contextlib.contextmanager
def _execvpe_mockup(defpath=None):
"""
Stubs out execv and execve functions when used as context manager.
Records exec calls. The mock execv and execve functions always raise an
exception as they would normally never return.
"""
# A list of tuples containing (function name, first arg, args)
# of calls to execv or execve that have been made.
calls = []
def mock_execv(name, *args):
calls.append(('execv', name, args))
raise RuntimeError("execv called")
def mock_execve(name, *args):
calls.append(('execve', name, args))
raise OSError(errno.ENOTDIR, "execve called")
try:
orig_execv = os.execv
orig_execve = os.execve
orig_defpath = os.defpath
os.execv = mock_execv
os.execve = mock_execve
if defpath is not None:
os.defpath = defpath
yield calls
finally:
os.execv = orig_execv
os.execve = orig_execve
os.defpath = orig_defpath
class ExecTests(unittest.TestCase):
@unittest.skipIf(USING_LINUXTHREADS,
"avoid triggering a linuxthreads bug: see issue #4970")
def test_execvpe_with_bad_program(self):
self.assertRaises(OSError, os.execvpe, 'no such app-',
['no such app-'], None)
def test_execvpe_with_bad_arglist(self):
self.assertRaises(ValueError, os.execvpe, 'notepad', [], None)
@unittest.skipUnless(hasattr(os, '_execvpe'),
"No internal os._execvpe function to test.")
def _test_internal_execvpe(self, test_type):
program_path = os.sep + 'absolutepath'
if test_type is bytes:
program = b'executable'
fullpath = os.path.join(os.fsencode(program_path), program)
native_fullpath = fullpath
arguments = [b'progname', 'arg1', 'arg2']
else:
program = 'executable'
arguments = ['progname', 'arg1', 'arg2']
fullpath = os.path.join(program_path, program)
if os.name != "nt":
native_fullpath = os.fsencode(fullpath)
else:
native_fullpath = fullpath
env = {'spam': 'beans'}
# test os._execvpe() with an absolute path
with _execvpe_mockup() as calls:
self.assertRaises(RuntimeError,
os._execvpe, fullpath, arguments)
self.assertEqual(len(calls), 1)
self.assertEqual(calls[0], ('execv', fullpath, (arguments,)))
# test os._execvpe() with a relative path:
# os.get_exec_path() returns defpath
with _execvpe_mockup(defpath=program_path) as calls:
self.assertRaises(OSError,
os._execvpe, program, arguments, env=env)
self.assertEqual(len(calls), 1)
self.assertSequenceEqual(calls[0],
('execve', native_fullpath, (arguments, env)))
# test os._execvpe() with a relative path:
# os.get_exec_path() reads the 'PATH' variable
with _execvpe_mockup() as calls:
env_path = env.copy()
if test_type is bytes:
env_path[b'PATH'] = program_path
else:
env_path['PATH'] = program_path
self.assertRaises(OSError,
os._execvpe, program, arguments, env=env_path)
self.assertEqual(len(calls), 1)
self.assertSequenceEqual(calls[0],
('execve', native_fullpath, (arguments, env_path)))
def test_internal_execvpe_str(self):
self._test_internal_execvpe(str)
if os.name != "nt":
self._test_internal_execvpe(bytes)
class Win32ErrorTests(unittest.TestCase):
def test_rename(self):
self.assertRaises(OSError, os.rename, support.TESTFN, support.TESTFN+".bak")
def test_remove(self):
self.assertRaises(OSError, os.remove, support.TESTFN)
def test_chdir(self):
self.assertRaises(OSError, os.chdir, support.TESTFN)
def test_mkdir(self):
f = open(support.TESTFN, "w")
try:
self.assertRaises(OSError, os.mkdir, support.TESTFN)
finally:
f.close()
os.unlink(support.TESTFN)
def test_utime(self):
self.assertRaises(OSError, os.utime, support.TESTFN, None)
def test_chmod(self):
self.assertRaises(OSError, os.chmod, support.TESTFN, 0)
class TestInvalidFD(unittest.TestCase):
singles = ["fchdir", "dup", "fdopen", "fdatasync", "fstat",
"fstatvfs", "fsync", "tcgetpgrp", "ttyname"]
#singles.append("close")
#We omit close because it doesn'r raise an exception on some platforms
def get_single(f):
def helper(self):
if hasattr(os, f):
self.check(getattr(os, f))
return helper
for f in singles:
locals()["test_"+f] = get_single(f)
def check(self, f, *args):
try:
f(support.make_bad_fd(), *args)
except OSError as e:
self.assertEqual(e.errno, errno.EBADF)
else:
self.fail("%r didn't raise a OSError with a bad file descriptor"
% f)
def test_isatty(self):
if hasattr(os, "isatty"):
self.assertEqual(os.isatty(support.make_bad_fd()), False)
def test_closerange(self):
if hasattr(os, "closerange"):
fd = support.make_bad_fd()
# Make sure none of the descriptors we are about to close are
# currently valid (issue 6542).
for i in range(10):
try: os.fstat(fd+i)
except OSError:
pass
else:
break
if i < 2:
raise unittest.SkipTest(
"Unable to acquire a range of invalid file descriptors")
self.assertEqual(os.closerange(fd, fd + i-1), None)
def test_dup2(self):
if hasattr(os, "dup2"):
self.check(os.dup2, 20)
def test_fchmod(self):
if hasattr(os, "fchmod"):
self.check(os.fchmod, 0)
def test_fchown(self):
if hasattr(os, "fchown"):
self.check(os.fchown, -1, -1)
def test_fpathconf(self):
if hasattr(os, "fpathconf"):
self.check(os.pathconf, "PC_NAME_MAX")
self.check(os.fpathconf, "PC_NAME_MAX")
def test_ftruncate(self):
if hasattr(os, "ftruncate"):
self.check(os.truncate, 0)
self.check(os.ftruncate, 0)
def test_lseek(self):
if hasattr(os, "lseek"):
self.check(os.lseek, 0, 0)
def test_read(self):
if hasattr(os, "read"):
self.check(os.read, 1)
def test_tcsetpgrpt(self):
if hasattr(os, "tcsetpgrp"):
self.check(os.tcsetpgrp, 0)
def test_write(self):
if hasattr(os, "write"):
self.check(os.write, b" ")
class LinkTests(unittest.TestCase):
def setUp(self):
self.file1 = support.TESTFN
self.file2 = os.path.join(support.TESTFN + "2")
def tearDown(self):
for file in (self.file1, self.file2):
if os.path.exists(file):
os.unlink(file)
def _test_link(self, file1, file2):
with open(file1, "w") as f1:
f1.write("test")
with warnings.catch_warnings():
warnings.simplefilter("ignore", DeprecationWarning)
os.link(file1, file2)
with open(file1, "r") as f1, open(file2, "r") as f2:
self.assertTrue(os.path.sameopenfile(f1.fileno(), f2.fileno()))
def test_link(self):
self._test_link(self.file1, self.file2)
def test_link_bytes(self):
self._test_link(bytes(self.file1, sys.getfilesystemencoding()),
bytes(self.file2, sys.getfilesystemencoding()))
def test_unicode_name(self):
try:
os.fsencode("\xf1")
except UnicodeError:
raise unittest.SkipTest("Unable to encode for this platform.")
self.file1 += "\xf1"
self.file2 = self.file1 + "2"
self._test_link(self.file1, self.file2)
if sys.platform != 'win32':
class Win32ErrorTests(unittest.TestCase):
pass
class PosixUidGidTests(unittest.TestCase):
if hasattr(os, 'setuid'):
def test_setuid(self):
if os.getuid() != 0:
self.assertRaises(OSError, os.setuid, 0)
self.assertRaises(OverflowError, os.setuid, 1<<32)
if hasattr(os, 'setgid'):
def test_setgid(self):
if os.getuid() != 0:
self.assertRaises(OSError, os.setgid, 0)
self.assertRaises(OverflowError, os.setgid, 1<<32)
if hasattr(os, 'seteuid'):
def test_seteuid(self):
if os.getuid() != 0:
self.assertRaises(OSError, os.seteuid, 0)
self.assertRaises(OverflowError, os.seteuid, 1<<32)
if hasattr(os, 'setegid'):
def test_setegid(self):
if os.getuid() != 0:
self.assertRaises(OSError, os.setegid, 0)
self.assertRaises(OverflowError, os.setegid, 1<<32)
if hasattr(os, 'setreuid'):
def test_setreuid(self):
if os.getuid() != 0:
self.assertRaises(OSError, os.setreuid, 0, 0)
self.assertRaises(OverflowError, os.setreuid, 1<<32, 0)
self.assertRaises(OverflowError, os.setreuid, 0, 1<<32)
def test_setreuid_neg1(self):
# Needs to accept -1. We run this in a subprocess to avoid
# altering the test runner's process state (issue8045).
subprocess.check_call([
sys.executable, '-c',
'import os,sys;os.setreuid(-1,-1);sys.exit(0)'])
if hasattr(os, 'setregid'):
def test_setregid(self):
if os.getuid() != 0:
self.assertRaises(OSError, os.setregid, 0, 0)
self.assertRaises(OverflowError, os.setregid, 1<<32, 0)
self.assertRaises(OverflowError, os.setregid, 0, 1<<32)
def test_setregid_neg1(self):
# Needs to accept -1. We run this in a subprocess to avoid
# altering the test runner's process state (issue8045).
subprocess.check_call([
sys.executable, '-c',
'import os,sys;os.setregid(-1,-1);sys.exit(0)'])
class Pep383Tests(unittest.TestCase):
def setUp(self):
if support.TESTFN_UNENCODABLE:
self.dir = support.TESTFN_UNENCODABLE
elif support.TESTFN_NONASCII:
self.dir = support.TESTFN_NONASCII
else:
self.dir = support.TESTFN
self.bdir = os.fsencode(self.dir)
bytesfn = []
def add_filename(fn):
try:
fn = os.fsencode(fn)
except UnicodeEncodeError:
return
bytesfn.append(fn)
add_filename(support.TESTFN_UNICODE)
if support.TESTFN_UNENCODABLE:
add_filename(support.TESTFN_UNENCODABLE)
if support.TESTFN_NONASCII:
add_filename(support.TESTFN_NONASCII)
if not bytesfn:
self.skipTest("couldn't create any non-ascii filename")
self.unicodefn = set()
os.mkdir(self.dir)
try:
for fn in bytesfn:
support.create_empty_file(os.path.join(self.bdir, fn))
fn = os.fsdecode(fn)
if fn in self.unicodefn:
raise ValueError("duplicate filename")
self.unicodefn.add(fn)
except:
shutil.rmtree(self.dir)
raise
def tearDown(self):
shutil.rmtree(self.dir)
def test_listdir(self):
expected = self.unicodefn
found = set(os.listdir(self.dir))
self.assertEqual(found, expected)
# test listdir without arguments
current_directory = os.getcwd()
try:
os.chdir(os.sep)
self.assertEqual(set(os.listdir()), set(os.listdir(os.sep)))
finally:
os.chdir(current_directory)
def test_open(self):
for fn in self.unicodefn:
f = open(os.path.join(self.dir, fn), 'rb')
f.close()
def test_stat(self):
for fn in self.unicodefn:
os.stat(os.path.join(self.dir, fn))
else:
class PosixUidGidTests(unittest.TestCase):
pass
class Pep383Tests(unittest.TestCase):
pass
@unittest.skipUnless(sys.platform == "win32", "Win32 specific tests")
class Win32KillTests(unittest.TestCase):
def _kill(self, sig):
# Start sys.executable as a subprocess and communicate from the
# subprocess to the parent that the interpreter is ready. When it
# becomes ready, send *sig* via os.kill to the subprocess and check
# that the return code is equal to *sig*.
import ctypes
from ctypes import wintypes
import msvcrt
# Since we can't access the contents of the process' stdout until the
# process has exited, use PeekNamedPipe to see what's inside stdout
# without waiting. This is done so we can tell that the interpreter
# is started and running at a point where it could handle a signal.
PeekNamedPipe = ctypes.windll.kernel32.PeekNamedPipe
PeekNamedPipe.restype = wintypes.BOOL
PeekNamedPipe.argtypes = (wintypes.HANDLE, # Pipe handle
ctypes.POINTER(ctypes.c_char), # stdout buf
wintypes.DWORD, # Buffer size
ctypes.POINTER(wintypes.DWORD), # bytes read
ctypes.POINTER(wintypes.DWORD), # bytes avail
ctypes.POINTER(wintypes.DWORD)) # bytes left
msg = "running"
proc = subprocess.Popen([sys.executable, "-c",
"import sys;"
"sys.stdout.write('{}');"
"sys.stdout.flush();"
"input()".format(msg)],
stdout=subprocess.PIPE,
stderr=subprocess.PIPE,
stdin=subprocess.PIPE)
self.addCleanup(proc.stdout.close)
self.addCleanup(proc.stderr.close)
self.addCleanup(proc.stdin.close)
count, max = 0, 100
while count < max and proc.poll() is None:
# Create a string buffer to store the result of stdout from the pipe
buf = ctypes.create_string_buffer(len(msg))
# Obtain the text currently in proc.stdout
# Bytes read/avail/left are left as NULL and unused
rslt = PeekNamedPipe(msvcrt.get_osfhandle(proc.stdout.fileno()),
buf, ctypes.sizeof(buf), None, None, None)
self.assertNotEqual(rslt, 0, "PeekNamedPipe failed")
if buf.value:
self.assertEqual(msg, buf.value.decode())
break
time.sleep(0.1)
count += 1
else:
self.fail("Did not receive communication from the subprocess")
os.kill(proc.pid, sig)
self.assertEqual(proc.wait(), sig)
def test_kill_sigterm(self):
# SIGTERM doesn't mean anything special, but make sure it works
self._kill(signal.SIGTERM)
def test_kill_int(self):
# os.kill on Windows can take an int which gets set as the exit code
self._kill(100)
def _kill_with_event(self, event, name):
tagname = "test_os_%s" % uuid.uuid1()
m = mmap.mmap(-1, 1, tagname)
m[0] = 0
# Run a script which has console control handling enabled.
proc = subprocess.Popen([sys.executable,
os.path.join(os.path.dirname(__file__),
"win_console_handler.py"), tagname],
creationflags=subprocess.CREATE_NEW_PROCESS_GROUP)
# Let the interpreter startup before we send signals. See #3137.
count, max = 0, 100
while count < max and proc.poll() is None:
if m[0] == 1:
break
time.sleep(0.1)
count += 1
else:
# Forcefully kill the process if we weren't able to signal it.
os.kill(proc.pid, signal.SIGINT)
self.fail("Subprocess didn't finish initialization")
os.kill(proc.pid, event)
# proc.send_signal(event) could also be done here.
# Allow time for the signal to be passed and the process to exit.
time.sleep(0.5)
if not proc.poll():
# Forcefully kill the process if we weren't able to signal it.
os.kill(proc.pid, signal.SIGINT)
self.fail("subprocess did not stop on {}".format(name))
@unittest.skip("subprocesses aren't inheriting CTRL+C property")
def test_CTRL_C_EVENT(self):
from ctypes import wintypes
import ctypes
# Make a NULL value by creating a pointer with no argument.
NULL = ctypes.POINTER(ctypes.c_int)()
SetConsoleCtrlHandler = ctypes.windll.kernel32.SetConsoleCtrlHandler
SetConsoleCtrlHandler.argtypes = (ctypes.POINTER(ctypes.c_int),
wintypes.BOOL)
SetConsoleCtrlHandler.restype = wintypes.BOOL
# Calling this with NULL and FALSE causes the calling process to
# handle CTRL+C, rather than ignore it. This property is inherited
# by subprocesses.
SetConsoleCtrlHandler(NULL, 0)
self._kill_with_event(signal.CTRL_C_EVENT, "CTRL_C_EVENT")
def test_CTRL_BREAK_EVENT(self):
self._kill_with_event(signal.CTRL_BREAK_EVENT, "CTRL_BREAK_EVENT")
@unittest.skipUnless(sys.platform == "win32", "Win32 specific tests")
@support.skip_unless_symlink
class Win32SymlinkTests(unittest.TestCase):
filelink = 'filelinktest'
filelink_target = os.path.abspath(__file__)
dirlink = 'dirlinktest'
dirlink_target = os.path.dirname(filelink_target)
missing_link = 'missing link'
def setUp(self):
assert os.path.exists(self.dirlink_target)
assert os.path.exists(self.filelink_target)
assert not os.path.exists(self.dirlink)
assert not os.path.exists(self.filelink)
assert not os.path.exists(self.missing_link)
def tearDown(self):
if os.path.exists(self.filelink):
os.remove(self.filelink)
if os.path.exists(self.dirlink):
os.rmdir(self.dirlink)
if os.path.lexists(self.missing_link):
os.remove(self.missing_link)
def test_directory_link(self):
os.symlink(self.dirlink_target, self.dirlink, True)
self.assertTrue(os.path.exists(self.dirlink))
self.assertTrue(os.path.isdir(self.dirlink))
self.assertTrue(os.path.islink(self.dirlink))
self.check_stat(self.dirlink, self.dirlink_target)
def test_file_link(self):
os.symlink(self.filelink_target, self.filelink)
self.assertTrue(os.path.exists(self.filelink))
self.assertTrue(os.path.isfile(self.filelink))
self.assertTrue(os.path.islink(self.filelink))
self.check_stat(self.filelink, self.filelink_target)
def _create_missing_dir_link(self):
'Create a "directory" link to a non-existent target'
linkname = self.missing_link
if os.path.lexists(linkname):
os.remove(linkname)
target = r'c:\\target does not exist.29r3c740'
assert not os.path.exists(target)
target_is_dir = True
os.symlink(target, linkname, target_is_dir)
def test_remove_directory_link_to_missing_target(self):
self._create_missing_dir_link()
# For compatibility with Unix, os.remove will check the
# directory status and call RemoveDirectory if the symlink
# was created with target_is_dir==True.
os.remove(self.missing_link)
@unittest.skip("currently fails; consider for improvement")
def test_isdir_on_directory_link_to_missing_target(self):
self._create_missing_dir_link()
# consider having isdir return true for directory links
self.assertTrue(os.path.isdir(self.missing_link))
@unittest.skip("currently fails; consider for improvement")
def test_rmdir_on_directory_link_to_missing_target(self):
self._create_missing_dir_link()
# consider allowing rmdir to remove directory links
os.rmdir(self.missing_link)
def check_stat(self, link, target):
self.assertEqual(os.stat(link), os.stat(target))
self.assertNotEqual(os.lstat(link), os.stat(link))
bytes_link = os.fsencode(link)
with warnings.catch_warnings():
warnings.simplefilter("ignore", DeprecationWarning)
self.assertEqual(os.stat(bytes_link), os.stat(target))
self.assertNotEqual(os.lstat(bytes_link), os.stat(bytes_link))
def test_12084(self):
level1 = os.path.abspath(support.TESTFN)
level2 = os.path.join(level1, "level2")
level3 = os.path.join(level2, "level3")
try:
os.mkdir(level1)
os.mkdir(level2)
os.mkdir(level3)
file1 = os.path.abspath(os.path.join(level1, "file1"))
with open(file1, "w") as f:
f.write("file1")
orig_dir = os.getcwd()
try:
os.chdir(level2)
link = os.path.join(level2, "link")
os.symlink(os.path.relpath(file1), "link")
self.assertIn("link", os.listdir(os.getcwd()))
# Check os.stat calls from the same dir as the link
self.assertEqual(os.stat(file1), os.stat("link"))
# Check os.stat calls from a dir below the link
os.chdir(level1)
self.assertEqual(os.stat(file1),
os.stat(os.path.relpath(link)))
# Check os.stat calls from a dir above the link
os.chdir(level3)
self.assertEqual(os.stat(file1),
os.stat(os.path.relpath(link)))
finally:
os.chdir(orig_dir)
except OSError as err:
self.fail(err)
finally:
os.remove(file1)
shutil.rmtree(level1)
class FSEncodingTests(unittest.TestCase):
def test_nop(self):
self.assertEqual(os.fsencode(b'abc\xff'), b'abc\xff')
self.assertEqual(os.fsdecode('abc\u0141'), 'abc\u0141')
def test_identity(self):
# assert fsdecode(fsencode(x)) == x
for fn in ('unicode\u0141', 'latin\xe9', 'ascii'):
try:
bytesfn = os.fsencode(fn)
except UnicodeEncodeError:
continue
self.assertEqual(os.fsdecode(bytesfn), fn)
class DeviceEncodingTests(unittest.TestCase):
def test_bad_fd(self):
# Return None when an fd doesn't actually exist.
self.assertIsNone(os.device_encoding(123456))
@unittest.skipUnless(os.isatty(0) and (sys.platform.startswith('win') or
(hasattr(locale, 'nl_langinfo') and hasattr(locale, 'CODESET'))),
'test requires a tty and either Windows or nl_langinfo(CODESET)')
def test_device_encoding(self):
encoding = os.device_encoding(0)
self.assertIsNotNone(encoding)
self.assertTrue(codecs.lookup(encoding))
class PidTests(unittest.TestCase):
@unittest.skipUnless(hasattr(os, 'getppid'), "test needs os.getppid")
def test_getppid(self):
p = subprocess.Popen([sys.executable, '-c',
'import os; print(os.getppid())'],
stdout=subprocess.PIPE)
stdout, _ = p.communicate()
# We are the parent of our subprocess
self.assertEqual(int(stdout), os.getpid())
# The introduction of this TestCase caused at least two different errors on
# *nix buildbots. Temporarily skip this to let the buildbots move along.
@unittest.skip("Skip due to platform/environment differences on *NIX buildbots")
@unittest.skipUnless(hasattr(os, 'getlogin'), "test needs os.getlogin")
class LoginTests(unittest.TestCase):
def test_getlogin(self):
user_name = os.getlogin()
self.assertNotEqual(len(user_name), 0)
@unittest.skipUnless(hasattr(os, 'getpriority') and hasattr(os, 'setpriority'),
"needs os.getpriority and os.setpriority")
class ProgramPriorityTests(unittest.TestCase):
"""Tests for os.getpriority() and os.setpriority()."""
def test_set_get_priority(self):
base = os.getpriority(os.PRIO_PROCESS, os.getpid())
os.setpriority(os.PRIO_PROCESS, os.getpid(), base + 1)
try:
new_prio = os.getpriority(os.PRIO_PROCESS, os.getpid())
if base >= 19 and new_prio <= 19:
raise unittest.SkipTest(
"unable to reliably test setpriority at current nice level of %s" % base)
else:
self.assertEqual(new_prio, base + 1)
finally:
try:
os.setpriority(os.PRIO_PROCESS, os.getpid(), base)
except OSError as err:
if err.errno != errno.EACCES:
raise
if threading is not None:
class SendfileTestServer(asyncore.dispatcher, threading.Thread):
class Handler(asynchat.async_chat):
def __init__(self, conn):
asynchat.async_chat.__init__(self, conn)
self.in_buffer = []
self.closed = False
self.push(b"220 ready\r\n")
def handle_read(self):
data = self.recv(4096)
self.in_buffer.append(data)
def get_data(self):
return b''.join(self.in_buffer)
def handle_close(self):
self.close()
self.closed = True
def handle_error(self):
raise
def __init__(self, address):
threading.Thread.__init__(self)
asyncore.dispatcher.__init__(self)
self.create_socket(socket.AF_INET, socket.SOCK_STREAM)
self.bind(address)
self.listen(5)
self.host, self.port = self.socket.getsockname()[:2]
self.handler_instance = None
self._active = False
self._active_lock = threading.Lock()
# --- public API
@property
def running(self):
return self._active
def start(self):
assert not self.running
self.__flag = threading.Event()
threading.Thread.start(self)
self.__flag.wait()
def stop(self):
assert self.running
self._active = False
self.join()
def wait(self):
# wait for handler connection to be closed, then stop the server
while not getattr(self.handler_instance, "closed", False):
time.sleep(0.001)
self.stop()
# --- internals
def run(self):
self._active = True
self.__flag.set()
while self._active and asyncore.socket_map:
self._active_lock.acquire()
asyncore.loop(timeout=0.001, count=1)
self._active_lock.release()
asyncore.close_all()
def handle_accept(self):
conn, addr = self.accept()
self.handler_instance = self.Handler(conn)
def handle_connect(self):
self.close()
handle_read = handle_connect
def writable(self):
return 0
def handle_error(self):
raise
@unittest.skipUnless(threading is not None, "test needs threading module")
@unittest.skipUnless(hasattr(os, 'sendfile'), "test needs os.sendfile()")
class TestSendfile(unittest.TestCase):
DATA = b"12345abcde" * 16 * 1024 # 160 KB
SUPPORT_HEADERS_TRAILERS = not sys.platform.startswith("linux") and \
not sys.platform.startswith("solaris") and \
not sys.platform.startswith("sunos")
@classmethod
def setUpClass(cls):
with open(support.TESTFN, "wb") as f:
f.write(cls.DATA)
@classmethod
def tearDownClass(cls):
support.unlink(support.TESTFN)
def setUp(self):
self.server = SendfileTestServer((support.HOST, 0))
self.server.start()
self.client = socket.socket()
self.client.connect((self.server.host, self.server.port))
self.client.settimeout(1)
# synchronize by waiting for "220 ready" response
self.client.recv(1024)
self.sockno = self.client.fileno()
self.file = open(support.TESTFN, 'rb')
self.fileno = self.file.fileno()
def tearDown(self):
self.file.close()
self.client.close()
if self.server.running:
self.server.stop()
def sendfile_wrapper(self, sock, file, offset, nbytes, headers=[], trailers=[]):
"""A higher level wrapper representing how an application is
supposed to use sendfile().
"""
while 1:
try:
if self.SUPPORT_HEADERS_TRAILERS:
return os.sendfile(sock, file, offset, nbytes, headers,
trailers)
else:
return os.sendfile(sock, file, offset, nbytes)
except OSError as err:
if err.errno == errno.ECONNRESET:
# disconnected
raise
elif err.errno in (errno.EAGAIN, errno.EBUSY):
# we have to retry send data
continue
else:
raise
def test_send_whole_file(self):
# normal send
total_sent = 0
offset = 0
nbytes = 4096
while total_sent < len(self.DATA):
sent = self.sendfile_wrapper(self.sockno, self.fileno, offset, nbytes)
if sent == 0:
break
offset += sent
total_sent += sent
self.assertTrue(sent <= nbytes)
self.assertEqual(offset, total_sent)
self.assertEqual(total_sent, len(self.DATA))
self.client.shutdown(socket.SHUT_RDWR)
self.client.close()
self.server.wait()
data = self.server.handler_instance.get_data()
self.assertEqual(len(data), len(self.DATA))
self.assertEqual(data, self.DATA)
def test_send_at_certain_offset(self):
# start sending a file at a certain offset
total_sent = 0
offset = len(self.DATA) // 2
must_send = len(self.DATA) - offset
nbytes = 4096
while total_sent < must_send:
sent = self.sendfile_wrapper(self.sockno, self.fileno, offset, nbytes)
if sent == 0:
break
offset += sent
total_sent += sent
self.assertTrue(sent <= nbytes)
self.client.shutdown(socket.SHUT_RDWR)
self.client.close()
self.server.wait()
data = self.server.handler_instance.get_data()
expected = self.DATA[len(self.DATA) // 2:]
self.assertEqual(total_sent, len(expected))
self.assertEqual(len(data), len(expected))
self.assertEqual(data, expected)
def test_offset_overflow(self):
# specify an offset > file size
offset = len(self.DATA) + 4096
try:
sent = os.sendfile(self.sockno, self.fileno, offset, 4096)
except OSError as e:
# Solaris can raise EINVAL if offset >= file length, ignore.
if e.errno != errno.EINVAL:
raise
else:
self.assertEqual(sent, 0)
self.client.shutdown(socket.SHUT_RDWR)
self.client.close()
self.server.wait()
data = self.server.handler_instance.get_data()
self.assertEqual(data, b'')
def test_invalid_offset(self):
with self.assertRaises(OSError) as cm:
os.sendfile(self.sockno, self.fileno, -1, 4096)
self.assertEqual(cm.exception.errno, errno.EINVAL)
# --- headers / trailers tests
if SUPPORT_HEADERS_TRAILERS:
def test_headers(self):
total_sent = 0
sent = os.sendfile(self.sockno, self.fileno, 0, 4096,
headers=[b"x" * 512])
total_sent += sent
offset = 4096
nbytes = 4096
while 1:
sent = self.sendfile_wrapper(self.sockno, self.fileno,
offset, nbytes)
if sent == 0:
break
total_sent += sent
offset += sent
expected_data = b"x" * 512 + self.DATA
self.assertEqual(total_sent, len(expected_data))
self.client.close()
self.server.wait()
data = self.server.handler_instance.get_data()
self.assertEqual(hash(data), hash(expected_data))
def test_trailers(self):
TESTFN2 = support.TESTFN + "2"
with open(TESTFN2, 'wb') as f:
f.write(b"abcde")
with open(TESTFN2, 'rb')as f:
self.addCleanup(os.remove, TESTFN2)
os.sendfile(self.sockno, f.fileno(), 0, 4096,
trailers=[b"12345"])
self.client.close()
self.server.wait()
data = self.server.handler_instance.get_data()
self.assertEqual(data, b"abcde12345")
if hasattr(os, "SF_NODISKIO"):
def test_flags(self):
try:
os.sendfile(self.sockno, self.fileno, 0, 4096,
flags=os.SF_NODISKIO)
except OSError as err:
if err.errno not in (errno.EBUSY, errno.EAGAIN):
raise
def supports_extended_attributes():
if not hasattr(os, "setxattr"):
return False
try:
with open(support.TESTFN, "wb") as fp:
try:
os.setxattr(fp.fileno(), b"user.test", b"")
except OSError:
return False
finally:
support.unlink(support.TESTFN)
# Kernels < 2.6.39 don't respect setxattr flags.
kernel_version = platform.release()
m = re.match("2.6.(\d{1,2})", kernel_version)
return m is None or int(m.group(1)) >= 39
@unittest.skipUnless(supports_extended_attributes(),
"no non-broken extended attribute support")
class ExtendedAttributeTests(unittest.TestCase):
def tearDown(self):
support.unlink(support.TESTFN)
def _check_xattrs_str(self, s, getxattr, setxattr, removexattr, listxattr, **kwargs):
fn = support.TESTFN
open(fn, "wb").close()
with self.assertRaises(OSError) as cm:
getxattr(fn, s("user.test"), **kwargs)
self.assertEqual(cm.exception.errno, errno.ENODATA)
init_xattr = listxattr(fn)
self.assertIsInstance(init_xattr, list)
setxattr(fn, s("user.test"), b"", **kwargs)
xattr = set(init_xattr)
xattr.add("user.test")
self.assertEqual(set(listxattr(fn)), xattr)
self.assertEqual(getxattr(fn, b"user.test", **kwargs), b"")
setxattr(fn, s("user.test"), b"hello", os.XATTR_REPLACE, **kwargs)
self.assertEqual(getxattr(fn, b"user.test", **kwargs), b"hello")
with self.assertRaises(OSError) as cm:
setxattr(fn, s("user.test"), b"bye", os.XATTR_CREATE, **kwargs)
self.assertEqual(cm.exception.errno, errno.EEXIST)
with self.assertRaises(OSError) as cm:
setxattr(fn, s("user.test2"), b"bye", os.XATTR_REPLACE, **kwargs)
self.assertEqual(cm.exception.errno, errno.ENODATA)
setxattr(fn, s("user.test2"), b"foo", os.XATTR_CREATE, **kwargs)
xattr.add("user.test2")
self.assertEqual(set(listxattr(fn)), xattr)
removexattr(fn, s("user.test"), **kwargs)
with self.assertRaises(OSError) as cm:
getxattr(fn, s("user.test"), **kwargs)
self.assertEqual(cm.exception.errno, errno.ENODATA)
xattr.remove("user.test")
self.assertEqual(set(listxattr(fn)), xattr)
self.assertEqual(getxattr(fn, s("user.test2"), **kwargs), b"foo")
setxattr(fn, s("user.test"), b"a"*1024, **kwargs)
self.assertEqual(getxattr(fn, s("user.test"), **kwargs), b"a"*1024)
removexattr(fn, s("user.test"), **kwargs)
many = sorted("user.test{}".format(i) for i in range(100))
for thing in many:
setxattr(fn, thing, b"x", **kwargs)
self.assertEqual(set(listxattr(fn)), set(init_xattr) | set(many))
def _check_xattrs(self, *args, **kwargs):
def make_bytes(s):
return bytes(s, "ascii")
self._check_xattrs_str(str, *args, **kwargs)
support.unlink(support.TESTFN)
self._check_xattrs_str(make_bytes, *args, **kwargs)
def test_simple(self):
self._check_xattrs(os.getxattr, os.setxattr, os.removexattr,
os.listxattr)
def test_lpath(self):
self._check_xattrs(os.getxattr, os.setxattr, os.removexattr,
os.listxattr, follow_symlinks=False)
def test_fds(self):
def getxattr(path, *args):
with open(path, "rb") as fp:
return os.getxattr(fp.fileno(), *args)
def setxattr(path, *args):
with open(path, "wb") as fp:
os.setxattr(fp.fileno(), *args)
def removexattr(path, *args):
with open(path, "wb") as fp:
os.removexattr(fp.fileno(), *args)
def listxattr(path, *args):
with open(path, "rb") as fp:
return os.listxattr(fp.fileno(), *args)
self._check_xattrs(getxattr, setxattr, removexattr, listxattr)
@unittest.skipUnless(sys.platform == "win32", "Win32 specific tests")
class Win32DeprecatedBytesAPI(unittest.TestCase):
def test_deprecated(self):
import nt
filename = os.fsencode(support.TESTFN)
with warnings.catch_warnings():
warnings.simplefilter("error", DeprecationWarning)
for func, *args in (
(nt._getfullpathname, filename),
(nt._isdir, filename),
(os.access, filename, os.R_OK),
(os.chdir, filename),
(os.chmod, filename, 0o777),
(os.getcwdb,),
(os.link, filename, filename),
(os.listdir, filename),
(os.lstat, filename),
(os.mkdir, filename),
(os.open, filename, os.O_RDONLY),
(os.rename, filename, filename),
(os.rmdir, filename),
(os.startfile, filename),
(os.stat, filename),
(os.unlink, filename),
(os.utime, filename),
):
self.assertRaises(DeprecationWarning, func, *args)
@support.skip_unless_symlink
def test_symlink(self):
filename = os.fsencode(support.TESTFN)
with warnings.catch_warnings():
warnings.simplefilter("error", DeprecationWarning)
self.assertRaises(DeprecationWarning,
os.symlink, filename, filename)
@unittest.skipUnless(hasattr(os, 'get_terminal_size'), "requires os.get_terminal_size")
class TermsizeTests(unittest.TestCase):
def test_does_not_crash(self):
"""Check if get_terminal_size() returns a meaningful value.
There's no easy portable way to actually check the size of the
terminal, so let's check if it returns something sensible instead.
"""
try:
size = os.get_terminal_size()
except OSError as e:
if sys.platform == "win32" or e.errno in (errno.EINVAL, errno.ENOTTY):
# Under win32 a generic OSError can be thrown if the
# handle cannot be retrieved
self.skipTest("failed to query terminal size")
raise
self.assertGreaterEqual(size.columns, 0)
self.assertGreaterEqual(size.lines, 0)
def test_stty_match(self):
"""Check if stty returns the same results
stty actually tests stdin, so get_terminal_size is invoked on
stdin explicitly. If stty succeeded, then get_terminal_size()
should work too.
"""
try:
size = subprocess.check_output(['stty', 'size']).decode().split()
except (FileNotFoundError, subprocess.CalledProcessError):
self.skipTest("stty invocation failed")
expected = (int(size[1]), int(size[0])) # reversed order
try:
actual = os.get_terminal_size(sys.__stdin__.fileno())
except OSError as e:
if sys.platform == "win32" or e.errno in (errno.EINVAL, errno.ENOTTY):
# Under win32 a generic OSError can be thrown if the
# handle cannot be retrieved
self.skipTest("failed to query terminal size")
raise
self.assertEqual(expected, actual)
class OSErrorTests(unittest.TestCase):
def setUp(self):
class Str(str):
pass
self.bytes_filenames = []
self.unicode_filenames = []
if support.TESTFN_UNENCODABLE is not None:
decoded = support.TESTFN_UNENCODABLE
else:
decoded = support.TESTFN
self.unicode_filenames.append(decoded)
self.unicode_filenames.append(Str(decoded))
if support.TESTFN_UNDECODABLE is not None:
encoded = support.TESTFN_UNDECODABLE
else:
encoded = os.fsencode(support.TESTFN)
self.bytes_filenames.append(encoded)
self.bytes_filenames.append(memoryview(encoded))
self.filenames = self.bytes_filenames + self.unicode_filenames
def test_oserror_filename(self):
funcs = [
(self.filenames, os.chdir,),
(self.filenames, os.chmod, 0o777),
(self.filenames, os.lstat,),
(self.filenames, os.open, os.O_RDONLY),
(self.filenames, os.rmdir,),
(self.filenames, os.stat,),
(self.filenames, os.unlink,),
]
if sys.platform == "win32":
funcs.extend((
(self.bytes_filenames, os.rename, b"dst"),
(self.bytes_filenames, os.replace, b"dst"),
(self.unicode_filenames, os.rename, "dst"),
(self.unicode_filenames, os.replace, "dst"),
# Issue #16414: Don't test undecodable names with listdir()
# because of a Windows bug.
#
# With the ANSI code page 932, os.listdir(b'\xe7') return an
# empty list (instead of failing), whereas os.listdir(b'\xff')
# raises a FileNotFoundError. It looks like a Windows bug:
# b'\xe7' directory does not exist, FindFirstFileA(b'\xe7')
# fails with ERROR_FILE_NOT_FOUND (2), instead of
# ERROR_PATH_NOT_FOUND (3).
(self.unicode_filenames, os.listdir,),
))
else:
funcs.extend((
(self.filenames, os.listdir,),
(self.filenames, os.rename, "dst"),
(self.filenames, os.replace, "dst"),
))
if hasattr(os, "chown"):
funcs.append((self.filenames, os.chown, 0, 0))
if hasattr(os, "lchown"):
funcs.append((self.filenames, os.lchown, 0, 0))
if hasattr(os, "truncate"):
funcs.append((self.filenames, os.truncate, 0))
if hasattr(os, "chflags"):
funcs.append((self.filenames, os.chflags, 0))
if hasattr(os, "lchflags"):
funcs.append((self.filenames, os.lchflags, 0))
if hasattr(os, "chroot"):
funcs.append((self.filenames, os.chroot,))
if hasattr(os, "link"):
if sys.platform == "win32":
funcs.append((self.bytes_filenames, os.link, b"dst"))
funcs.append((self.unicode_filenames, os.link, "dst"))
else:
funcs.append((self.filenames, os.link, "dst"))
if hasattr(os, "listxattr"):
funcs.extend((
(self.filenames, os.listxattr,),
(self.filenames, os.getxattr, "user.test"),
(self.filenames, os.setxattr, "user.test", b'user'),
(self.filenames, os.removexattr, "user.test"),
))
if hasattr(os, "lchmod"):
funcs.append((self.filenames, os.lchmod, 0o777))
if hasattr(os, "readlink"):
if sys.platform == "win32":
funcs.append((self.unicode_filenames, os.readlink,))
else:
funcs.append((self.filenames, os.readlink,))
for filenames, func, *func_args in funcs:
for name in filenames:
try:
func(name, *func_args)
except OSError as err:
self.assertIs(err.filename, name)
else:
self.fail("No exception thrown by {}".format(func))
@support.reap_threads
def test_main():
support.run_unittest(
FileTests,
StatAttributeTests,
EnvironTests,
WalkTests,
FwalkTests,
MakedirTests,
DevNullTests,
URandomTests,
ExecTests,
Win32ErrorTests,
TestInvalidFD,
PosixUidGidTests,
Pep383Tests,
Win32KillTests,
Win32SymlinkTests,
FSEncodingTests,
DeviceEncodingTests,
PidTests,
LoginTests,
LinkTests,
TestSendfile,
ProgramPriorityTests,
ExtendedAttributeTests,
Win32DeprecatedBytesAPI,
TermsizeTests,
OSErrorTests,
RemoveDirsTests,
)
if __name__ == "__main__":
test_main()
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