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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 uuid
import stat
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# Detect whether we're on a Linux system that uses the (now outdated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(os, "confstr_names") and
"CS_GNU_LIBPTHREAD_VERSION" in os.confstr_names):
libpthread = os.confstr("CS_GNU_LIBPTHREAD_VERSION")
USING_LINUXTHREADS= libpthread.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)
# 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
import stat
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)
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)
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))
# 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 WindowsError as e:
if e.errno == 2: # file does not exist; cannot run test
return
self.fail("Could not stat pagefile.sys")
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
def test_update2(self):
os.environ.clear()
if os.path.exists("/bin/sh"):
os.environ.update(HELLO="World")
with os.popen("/bin/sh -c 'echo $HELLO'") as popen:
value = popen.read().strip()
self.assertEqual(value, "World")
def test_os_popen_iter(self):
if os.path.exists("/bin/sh"):
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).
@unittest.skipIf(sys.platform.startswith(('freebsd', 'darwin')),
"due to known OS bug: see issue #13415")
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 test_traversal(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
# 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")
# 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)
sub2_tree = (sub2_path, ["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()
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"]))
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()
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)
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)
try:
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)
finally:
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 OSError:
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)
# May work even 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(WindowsError, os.rename, support.TESTFN, support.TESTFN+".bak")
def test_remove(self):
self.assertRaises(WindowsError, os.remove, support.TESTFN)
def test_chdir(self):
self.assertRaises(WindowsError, os.chdir, support.TESTFN)
def test_mkdir(self):
f = open(support.TESTFN, "w")
try:
self.assertRaises(WindowsError, os.mkdir, support.TESTFN)
finally:
f.close()
os.unlink(support.TESTFN)
def test_utime(self):
self.assertRaises(WindowsError, os.utime, support.TESTFN, None)
def test_chmod(self):
self.assertRaises(WindowsError, 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.fpathconf, "PC_NAME_MAX")
def test_ftruncate(self):
if hasattr(os, "ftruncate"):
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")
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(os.error, os.setuid, 0)
self.assertRaises(OverflowError, os.setuid, 1<<32)
if hasattr(os, 'setgid'):
def test_setgid(self):
if os.getuid() != 0:
self.assertRaises(os.error, os.setgid, 0)
self.assertRaises(OverflowError, os.setgid, 1<<32)
if hasattr(os, 'seteuid'):
def test_seteuid(self):
if os.getuid() != 0:
self.assertRaises(os.error, os.seteuid, 0)
self.assertRaises(OverflowError, os.seteuid, 1<<32)
if hasattr(os, 'setegid'):
def test_setegid(self):
if os.getuid() != 0:
self.assertRaises(os.error, os.setegid, 0)
self.assertRaises(OverflowError, os.setegid, 1<<32)
if hasattr(os, 'setreuid'):
def test_setreuid(self):
if os.getuid() != 0:
self.assertRaises(os.error, 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(os.error, 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:
f = open(os.path.join(self.bdir, fn), "w")
f.close()
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)
def test_open(self):
for fn in self.unicodefn:
f = open(os.path.join(self.dir, fn), 'rb')
f.close()
@unittest.skipUnless(hasattr(os, 'statvfs'),
"need os.statvfs()")
def test_statvfs(self):
# issue #9645
for fn in self.unicodefn:
# should not fail with file not found error
fullname = os.path.join(self.dir, fn)
os.statvfs(fullname)
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)
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 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)
def test_main():
support.run_unittest(
FileTests,
StatAttributeTests,
EnvironTests,
WalkTests,
MakedirTests,
DevNullTests,
URandomTests,
ExecTests,
Win32ErrorTests,
TestInvalidFD,
PosixUidGidTests,
Pep383Tests,
Win32KillTests,
Win32SymlinkTests,
FSEncodingTests,
PidTests,
LoginTests,
LinkTests,
RemoveDirsTests,
)
if __name__ == "__main__":
test_main()
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