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test_os.py
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2679 lines (2314 loc) · 97.7 KB
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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 asynchat
import asyncore
import codecs
import contextlib
import decimal
import errno
import fractions
import itertools
import locale
import mmap
import os
import pickle
import platform
import re
import shutil
import signal
import socket
import stat
import subprocess
import sys
import sysconfig
import time
import unittest
import uuid
import warnings
from test import support
try:
import threading
except ImportError:
threading = None
try:
import resource
except ImportError:
resource = None
try:
import fcntl
except ImportError:
fcntl = None
from test.script_helper import assert_python_ok
# Detect whether we're on a Linux system that uses the (now outdated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
# Issue #14110: Some tests fail on FreeBSD if the user is in the wheel group.
HAVE_WHEEL_GROUP = sys.platform.startswith('freebsd') and os.getgid() == 0
# Tests creating TESTFN
class FileTests(unittest.TestCase):
def setUp(self):
if os.path.lexists(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")
def test_open_keywords(self):
f = os.open(path=__file__, flags=os.O_RDONLY, mode=0o777,
dir_fd=None)
os.close(f)
def test_symlink_keywords(self):
symlink = support.get_attribute(os, "symlink")
try:
symlink(src='target', dst=support.TESTFN,
target_is_directory=False, dir_fd=None)
except (NotImplementedError, OSError):
pass # No OS support or unprivileged user
# 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)
@unittest.skipUnless(hasattr(os, 'stat'), 'test needs os.stat()')
def check_stat_attributes(self, fname):
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_stat_result_pickle(self):
result = os.stat(self.fname)
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
p = pickle.dumps(result, proto)
self.assertIn(b'stat_result', p)
if proto < 4:
self.assertIn(b'cos\nstat_result\n', p)
unpickled = pickle.loads(p)
self.assertEqual(result, unpickled)
@unittest.skipUnless(hasattr(os, 'statvfs'), 'test needs os.statvfs()')
def test_statvfs_attributes(self):
try:
result = os.statvfs(self.fname)
except OSError as e:
# On AtheOS, glibc always returns ENOSYS
if e.errno == errno.ENOSYS:
self.skipTest('os.statvfs() failed with ENOSYS')
# 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
@unittest.skipUnless(hasattr(os, 'statvfs'),
"need os.statvfs()")
def test_statvfs_result_pickle(self):
try:
result = os.statvfs(self.fname)
except OSError as e:
# On AtheOS, glibc always returns ENOSYS
if e.errno == errno.ENOSYS:
self.skipTest('os.statvfs() failed with ENOSYS')
for proto in range(pickle.HIGHEST_PROTOCOL + 1):
p = pickle.dumps(result, proto)
self.assertIn(b'statvfs_result', p)
if proto < 4:
self.assertIn(b'cos\nstatvfs_result\n', p)
unpickled = pickle.loads(p)
self.assertEqual(result, unpickled)
@unittest.skipUnless(sys.platform == "win32", "Win32 specific tests")
def test_1686475(self):
# Verify that an open file can be stat'ed
try:
os.stat(r"c:\pagefile.sys")
except FileNotFoundError:
self.skipTest(r'c:\pagefile.sys does not exist')
except OSError as e:
self.fail("Could not stat pagefile.sys")
@unittest.skipUnless(sys.platform == "win32", "Win32 specific tests")
@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)
class UtimeTests(unittest.TestCase):
def setUp(self):
self.dirname = support.TESTFN
self.fname = os.path.join(self.dirname, "f1")
self.addCleanup(support.rmtree, self.dirname)
os.mkdir(self.dirname)
with open(self.fname, 'wb') as fp:
fp.write(b"ABC")
def restore_float_times(state):
with warnings.catch_warnings():
warnings.simplefilter("ignore", DeprecationWarning)
os.stat_float_times(state)
# ensure that st_atime and st_mtime are float
with warnings.catch_warnings():
warnings.simplefilter("ignore", DeprecationWarning)
old_float_times = os.stat_float_times(-1)
self.addCleanup(restore_float_times, old_float_times)
os.stat_float_times(True)
def support_subsecond(self, filename):
# Heuristic to check if the filesystem supports timestamp with
# subsecond resolution: check if float and int timestamps are different
st = os.stat(filename)
return ((st.st_atime != st[7])
or (st.st_mtime != st[8])
or (st.st_ctime != st[9]))
def _test_utime(self, set_time, filename=None):
if not filename:
filename = self.fname
support_subsecond = self.support_subsecond(filename)
if support_subsecond:
# Timestamp with a resolution of 1 microsecond (10^-6).
#
# The resolution of the C internal function used by os.utime()
# depends on the platform: 1 sec, 1 us, 1 ns. Writing a portable
# test with a resolution of 1 ns requires more work:
# see the issue #15745.
atime_ns = 1002003000 # 1.002003 seconds
mtime_ns = 4005006000 # 4.005006 seconds
else:
# use a resolution of 1 second
atime_ns = 5 * 10**9
mtime_ns = 8 * 10**9
set_time(filename, (atime_ns, mtime_ns))
st = os.stat(filename)
if support_subsecond:
self.assertAlmostEqual(st.st_atime, atime_ns * 1e-9, delta=1e-6)
self.assertAlmostEqual(st.st_mtime, mtime_ns * 1e-9, delta=1e-6)
else:
self.assertEqual(st.st_atime, atime_ns * 1e-9)
self.assertEqual(st.st_mtime, mtime_ns * 1e-9)
self.assertEqual(st.st_atime_ns, atime_ns)
self.assertEqual(st.st_mtime_ns, mtime_ns)
def test_utime(self):
def set_time(filename, ns):
# test the ns keyword parameter
os.utime(filename, ns=ns)
self._test_utime(set_time)
@staticmethod
def ns_to_sec(ns):
# Convert a number of nanosecond (int) to a number of seconds (float).
# Round towards infinity by adding 0.5 nanosecond to avoid rounding
# issue, os.utime() rounds towards minus infinity.
return (ns * 1e-9) + 0.5e-9
def test_utime_by_indexed(self):
# pass times as floating point seconds as the second indexed parameter
def set_time(filename, ns):
atime_ns, mtime_ns = ns
atime = self.ns_to_sec(atime_ns)
mtime = self.ns_to_sec(mtime_ns)
# test utimensat(timespec), utimes(timeval), utime(utimbuf)
# or utime(time_t)
os.utime(filename, (atime, mtime))
self._test_utime(set_time)
def test_utime_by_times(self):
def set_time(filename, ns):
atime_ns, mtime_ns = ns
atime = self.ns_to_sec(atime_ns)
mtime = self.ns_to_sec(mtime_ns)
# test the times keyword parameter
os.utime(filename, times=(atime, mtime))
self._test_utime(set_time)
@unittest.skipUnless(os.utime in os.supports_follow_symlinks,
"follow_symlinks support for utime required "
"for this test.")
def test_utime_nofollow_symlinks(self):
def set_time(filename, ns):
# use follow_symlinks=False to test utimensat(timespec)
# or lutimes(timeval)
os.utime(filename, ns=ns, follow_symlinks=False)
self._test_utime(set_time)
@unittest.skipUnless(os.utime in os.supports_fd,
"fd support for utime required for this test.")
def test_utime_fd(self):
def set_time(filename, ns):
with open(filename, 'wb') as fp:
# use a file descriptor to test futimens(timespec)
# or futimes(timeval)
os.utime(fp.fileno(), ns=ns)
self._test_utime(set_time)
@unittest.skipUnless(os.utime in os.supports_dir_fd,
"dir_fd support for utime required for this test.")
def test_utime_dir_fd(self):
def set_time(filename, ns):
dirname, name = os.path.split(filename)
dirfd = os.open(dirname, os.O_RDONLY)
try:
# pass dir_fd to test utimensat(timespec) or futimesat(timeval)
os.utime(name, dir_fd=dirfd, ns=ns)
finally:
os.close(dirfd)
self._test_utime(set_time)
def test_utime_directory(self):
def set_time(filename, ns):
# test calling os.utime() on a directory
os.utime(filename, ns=ns)
self._test_utime(set_time, filename=self.dirname)
def _test_utime_current(self, set_time):
# Get the system clock
current = time.time()
# Call os.utime() to set the timestamp to the current system clock
set_time(self.fname)
if not self.support_subsecond(self.fname):
delta = 1.0
else:
# On Windows, the usual resolution of time.time() is 15.6 ms
delta = 0.020
st = os.stat(self.fname)
msg = ("st_time=%r, current=%r, dt=%r"
% (st.st_mtime, current, st.st_mtime - current))
self.assertAlmostEqual(st.st_mtime, current,
delta=delta, msg=msg)
def test_utime_current(self):
def set_time(filename):
# Set to the current time in the new way
os.utime(self.fname)
self._test_utime_current(set_time)
def test_utime_current_old(self):
def set_time(filename):
# Set to the current time in the old explicit way.
os.utime(self.fname, None)
self._test_utime_current(set_time)
def get_file_system(self, path):
if sys.platform == 'win32':
root = os.path.splitdrive(os.path.abspath(path))[0] + '\\'
import ctypes
kernel32 = ctypes.windll.kernel32
buf = ctypes.create_unicode_buffer("", 100)
ok = kernel32.GetVolumeInformationW(root, None, 0,
None, None, None,
buf, len(buf))
if ok:
return buf.value
# return None if the filesystem is unknown
def test_large_time(self):
# Many filesystems are limited to the year 2038. At least, the test
# pass with NTFS filesystem.
if self.get_file_system(self.dirname) != "NTFS":
self.skipTest("requires NTFS")
large = 5000000000 # some day in 2128
os.utime(self.fname, (large, large))
self.assertEqual(os.stat(self.fname).st_mtime, large)
def test_utime_invalid_arguments(self):
# seconds and nanoseconds parameters are mutually exclusive
with self.assertRaises(ValueError):
os.utime(self.fname, (5, 5), ns=(5, 5))
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)
def test_key_type(self):
missing = 'missingkey'
self.assertNotIn(missing, os.environ)
with self.assertRaises(KeyError) as cm:
os.environ[missing]
self.assertIs(cm.exception.args[0], missing)
self.assertTrue(cm.exception.__suppress_context__)
with self.assertRaises(KeyError) as cm:
del os.environ[missing]
self.assertIs(cm.exception.args[0], missing)
self.assertTrue(cm.exception.__suppress_context__)
class WalkTests(unittest.TestCase):
"""Tests for os.walk()."""
# Wrapper to hide minor differences between os.walk and os.fwalk
# to tests both functions with the same code base
def walk(self, directory, topdown=True, follow_symlinks=False):
walk_it = os.walk(directory,
topdown=topdown,
followlinks=follow_symlinks)
for root, dirs, files in walk_it:
yield (root, dirs, files)
def setUp(self):
join = os.path.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
self.walk_path = join(support.TESTFN, "TEST1")
self.sub1_path = join(self.walk_path, "SUB1")
self.sub11_path = join(self.sub1_path, "SUB11")
sub2_path = join(self.walk_path, "SUB2")
tmp1_path = join(self.walk_path, "tmp1")
tmp2_path = join(self.sub1_path, "tmp2")
tmp3_path = join(sub2_path, "tmp3")
self.link_path = join(sub2_path, "link")
t2_path = join(support.TESTFN, "TEST2")
tmp4_path = join(support.TESTFN, "TEST2", "tmp4")
broken_link_path = join(sub2_path, "broken_link")
# Create stuff.
os.makedirs(self.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():
os.symlink(os.path.abspath(t2_path), self.link_path)
os.symlink('broken', broken_link_path, True)
if os.path.isdir(broken_link_path):
# On Windows a symlink can has the FILE_ATTRIBUTE_DIRECTORY flag.
self.sub2_tree = (sub2_path, ["broken_link", "link"], ["tmp3"])
else:
self.sub2_tree = (sub2_path, ["link"], ["broken_link", "tmp3"])
else:
self.sub2_tree = (sub2_path, [], ["tmp3"])
def test_walk_topdown(self):
# Walk top-down.
all = list(os.walk(self.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], (self.walk_path, ["SUB1", "SUB2"], ["tmp1"]))
self.assertEqual(all[1 + flipped], (self.sub1_path, ["SUB11"], ["tmp2"]))
self.assertEqual(all[2 + flipped], (self.sub11_path, [], []))
self.assertEqual(all[3 - 2 * flipped], self.sub2_tree)
def test_walk_prune(self):
# Prune the search.
all = []
for root, dirs, files in self.walk(self.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],
(self.walk_path, ["SUB2"], ["tmp1"]))
all[1][-1].sort()
self.assertEqual(all[1], self.sub2_tree)
def test_walk_bottom_up(self):
# Walk bottom-up.
all = list(self.walk(self.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],
(self.walk_path, ["SUB1", "SUB2"], ["tmp1"]))
self.assertEqual(all[flipped],
(self.sub11_path, [], []))
self.assertEqual(all[flipped + 1],
(self.sub1_path, ["SUB11"], ["tmp2"]))
self.assertEqual(all[2 - 2 * flipped],
self.sub2_tree)
def test_walk_symlink(self):
if not support.can_symlink():
self.skipTest("need symlink support")
# Walk, following symlinks.
walk_it = self.walk(self.walk_path, follow_symlinks=True)
for root, dirs, files in walk_it:
if root == self.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 walk(self, directory, topdown=True, follow_symlinks=False):
walk_it = os.fwalk(directory,
topdown=topdown,
follow_symlinks=follow_symlinks)
for root, dirs, files, root_fd in walk_it:
yield (root, dirs, files)
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)
os.makedirs(path, 0o776, exist_ok=True)
os.makedirs(path, mode=mode, exist_ok=True)
os.umask(old_mask)
# Issue #25583: A drive root could raise PermissionError on Windows
os.makedirs(os.path.abspath('/'), exist_ok=True)
@unittest.skipUnless(hasattr(os, 'chown'), 'test needs os.chown')
def test_chown_uid_gid_arguments_must_be_index(self):
stat = os.stat(support.TESTFN)
uid = stat.st_uid
gid = stat.st_gid
for value in (-1.0, -1j, decimal.Decimal(-1), fractions.Fraction(-2, 2)):
self.assertRaises(TypeError, os.chown, support.TESTFN, value, gid)
self.assertRaises(TypeError, os.chown, support.TESTFN, uid, value)
self.assertIsNone(os.chown(support.TESTFN, uid, gid))
self.assertIsNone(os.chown(support.TESTFN, -1, -1))
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: