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| Current File : //usr/local/lib/python2.5/test/test_os.py |
# 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 unittest
import warnings
import sys
from test import test_support
warnings.filterwarnings("ignore", "tempnam", RuntimeWarning, __name__)
warnings.filterwarnings("ignore", "tmpnam", RuntimeWarning, __name__)
# Tests creating TESTFN
class FileTests(unittest.TestCase):
def setUp(self):
if os.path.exists(test_support.TESTFN):
os.unlink(test_support.TESTFN)
tearDown = setUp
def test_access(self):
f = os.open(test_support.TESTFN, os.O_CREAT|os.O_RDWR)
os.close(f)
self.assert_(os.access(test_support.TESTFN, os.W_OK))
def test_rename(self):
path = unicode(test_support.TESTFN)
old = sys.getrefcount(path)
self.assertRaises(TypeError, os.rename, path, 0)
new = sys.getrefcount(path)
self.assertEqual(old, new)
class TemporaryFileTests(unittest.TestCase):
def setUp(self):
self.files = []
os.mkdir(test_support.TESTFN)
def tearDown(self):
for name in self.files:
os.unlink(name)
os.rmdir(test_support.TESTFN)
def check_tempfile(self, name):
# make sure it doesn't already exist:
self.failIf(os.path.exists(name),
"file already exists for temporary file")
# make sure we can create the file
open(name, "w")
self.files.append(name)
def test_tempnam(self):
if not hasattr(os, "tempnam"):
return
warnings.filterwarnings("ignore", "tempnam", RuntimeWarning,
r"test_os$")
self.check_tempfile(os.tempnam())
name = os.tempnam(test_support.TESTFN)
self.check_tempfile(name)
name = os.tempnam(test_support.TESTFN, "pfx")
self.assert_(os.path.basename(name)[:3] == "pfx")
self.check_tempfile(name)
def test_tmpfile(self):
if not hasattr(os, "tmpfile"):
return
# As with test_tmpnam() below, the Windows implementation of tmpfile()
# attempts to create a file in the root directory of the current drive.
# On Vista and Server 2008, this test will always fail for normal users
# as writing to the root directory requires elevated privileges. With
# XP and below, the semantics of tmpfile() are the same, but the user
# running the test is more likely to have administrative privileges on
# their account already. If that's the case, then os.tmpfile() should
# work. In order to make this test as useful as possible, rather than
# trying to detect Windows versions or whether or not the user has the
# right permissions, just try and create a file in the root directory
# and see if it raises a 'Permission denied' OSError. If it does, then
# test that a subsequent call to os.tmpfile() raises the same error. If
# it doesn't, assume we're on XP or below and the user running the test
# has administrative privileges, and proceed with the test as normal.
if sys.platform == 'win32':
name = '\\python_test_os_test_tmpfile.txt'
if os.path.exists(name):
os.remove(name)
try:
fp = open(name, 'w')
except IOError, first:
# open() failed, assert tmpfile() fails in the same way.
# Although open() raises an IOError and os.tmpfile() raises an
# OSError(), 'args' will be (13, 'Permission denied') in both
# cases.
try:
fp = os.tmpfile()
except OSError, second:
self.assertEqual(first.args, second.args)
else:
self.fail("expected os.tmpfile() to raise OSError")
return
else:
# open() worked, therefore, tmpfile() should work. Close our
# dummy file and proceed with the test as normal.
fp.close()
os.remove(name)
fp = os.tmpfile()
fp.write("foobar")
fp.seek(0,0)
s = fp.read()
fp.close()
self.assert_(s == "foobar")
def test_tmpnam(self):
import sys
if not hasattr(os, "tmpnam"):
return
warnings.filterwarnings("ignore", "tmpnam", RuntimeWarning,
r"test_os$")
name = os.tmpnam()
if sys.platform in ("win32",):
# The Windows tmpnam() seems useless. From the MS docs:
#
# The character string that tmpnam creates consists of
# the path prefix, defined by the entry P_tmpdir in the
# file STDIO.H, followed by a sequence consisting of the
# digit characters '0' through '9'; the numerical value
# of this string is in the range 1 - 65,535. Changing the
# definitions of L_tmpnam or P_tmpdir in STDIO.H does not
# change the operation of tmpnam.
#
# The really bizarre part is that, at least under MSVC6,
# P_tmpdir is "\\". That is, the path returned refers to
# the root of the current drive. That's a terrible place to
# put temp files, and, depending on privileges, the user
# may not even be able to open a file in the root directory.
self.failIf(os.path.exists(name),
"file already exists for temporary file")
else:
self.check_tempfile(name)
# Test attributes on return values from os.*stat* family.
class StatAttributeTests(unittest.TestCase):
def setUp(self):
os.mkdir(test_support.TESTFN)
self.fname = os.path.join(test_support.TESTFN, "f1")
f = open(self.fname, 'wb')
f.write("ABC")
f.close()
def tearDown(self):
os.unlink(self.fname)
os.rmdir(test_support.TESTFN)
def test_stat_attributes(self):
if not hasattr(os, "stat"):
return
import stat
result = os.stat(self.fname)
# Make sure direct access works
self.assertEquals(result[stat.ST_SIZE], 3)
self.assertEquals(result.st_size, 3)
import sys
# 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.assertEquals(trunc(getattr(result, attr)),
result[getattr(stat, name)])
self.assert_(attr in members)
try:
result[200]
self.fail("No exception thrown")
except IndexError:
pass
# Make sure that assignment fails
try:
result.st_mode = 1
self.fail("No exception thrown")
except TypeError:
pass
try:
result.st_rdev = 1
self.fail("No exception thrown")
except (AttributeError, TypeError):
pass
try:
result.parrot = 1
self.fail("No exception thrown")
except AttributeError:
pass
# Use the stat_result constructor with a too-short tuple.
try:
result2 = os.stat_result((10,))
self.fail("No exception thrown")
except TypeError:
pass
# Use the constructr 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_statvfs_attributes(self):
if not hasattr(os, "statvfs"):
return
import statvfs
try:
result = os.statvfs(self.fname)
except OSError, e:
# On AtheOS, glibc always returns ENOSYS
import errno
if e.errno == errno.ENOSYS:
return
# Make sure direct access works
self.assertEquals(result.f_bfree, result[statvfs.F_BFREE])
# Make sure all the attributes are there
members = dir(result)
for name in dir(statvfs):
if name[:2] == 'F_':
attr = name.lower()
self.assertEquals(getattr(result, attr),
result[getattr(statvfs, name)])
self.assert_(attr in members)
# Make sure that assignment really fails
try:
result.f_bfree = 1
self.fail("No exception thrown")
except TypeError:
pass
try:
result.parrot = 1
self.fail("No exception thrown")
except AttributeError:
pass
# Use the constructor with a too-short tuple.
try:
result2 = os.statvfs_result((10,))
self.fail("No exception thrown")
except TypeError:
pass
# Use the constructr 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
# 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_string_buffer("", 100)
if kernel32.GetVolumeInformationA(root, None, 0, None, None, None, buf, len(buf)):
return buf.value
if get_file_system(test_support.TESTFN) == "NTFS":
def test_1565150(self):
t1 = 1159195039.25
os.utime(self.fname, (t1, t1))
self.assertEquals(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, e:
if e == 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 _reference(self):
return {"KEY1":"VALUE1", "KEY2":"VALUE2", "KEY3":"VALUE3"}
def _empty_mapping(self):
os.environ.clear()
return os.environ
def setUp(self):
self.__save = dict(os.environ)
os.environ.clear()
def tearDown(self):
os.environ.clear()
os.environ.update(self.__save)
# Bug 1110478
def test_update2(self):
if os.path.exists("/bin/sh"):
os.environ.update(HELLO="World")
value = os.popen("/bin/sh -c 'echo $HELLO'").read().strip()
self.assertEquals(value, "World")
class WalkTests(unittest.TestCase):
"""Tests for os.walk()."""
def test_traversal(self):
import os
from os.path import join
# Build:
# TESTFN/ a file kid and two directory kids
# tmp1
# SUB1/ a file kid and a directory kid
# tmp2
# SUB11/ no kids
# SUB2/ just a file kid
# tmp3
sub1_path = join(test_support.TESTFN, "SUB1")
sub11_path = join(sub1_path, "SUB11")
sub2_path = join(test_support.TESTFN, "SUB2")
tmp1_path = join(test_support.TESTFN, "tmp1")
tmp2_path = join(sub1_path, "tmp2")
tmp3_path = join(sub2_path, "tmp3")
# Create stuff.
os.makedirs(sub11_path)
os.makedirs(sub2_path)
for path in tmp1_path, tmp2_path, tmp3_path:
f = file(path, "w")
f.write("I'm " + path + " and proud of it. Blame test_os.\n")
f.close()
# Walk top-down.
all = list(os.walk(test_support.TESTFN))
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], (test_support.TESTFN, ["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_path, [], ["tmp3"]))
# Prune the search.
all = []
for root, dirs, files in os.walk(test_support.TESTFN):
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], (test_support.TESTFN, ["SUB2"], ["tmp1"]))
self.assertEqual(all[1], (sub2_path, [], ["tmp3"]))
# Walk bottom-up.
all = list(os.walk(test_support.TESTFN, 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], (test_support.TESTFN, ["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_path, [], ["tmp3"]))
# 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(test_support.TESTFN, topdown=False):
for name in files:
os.remove(join(root, name))
for name in dirs:
os.rmdir(join(root, name))
os.rmdir(test_support.TESTFN)
class MakedirTests (unittest.TestCase):
def setUp(self):
os.mkdir(test_support.TESTFN)
def test_makedir(self):
base = test_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.failUnlessRaises(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 tearDown(self):
path = os.path.join(test_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 != test_support.TESTFN:
path = os.path.dirname(path)
os.removedirs(path)
class DevNullTests (unittest.TestCase):
def test_devnull(self):
f = file(os.devnull, 'w')
f.write('hello')
f.close()
f = file(os.devnull, 'r')
self.assertEqual(f.read(), '')
f.close()
class URandomTests (unittest.TestCase):
def test_urandom(self):
try:
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)
except NotImplementedError:
pass
class Win32ErrorTests(unittest.TestCase):
def test_rename(self):
self.assertRaises(WindowsError, os.rename, test_support.TESTFN, test_support.TESTFN+".bak")
def test_remove(self):
self.assertRaises(WindowsError, os.remove, test_support.TESTFN)
def test_chdir(self):
self.assertRaises(WindowsError, os.chdir, test_support.TESTFN)
def test_mkdir(self):
self.assertRaises(WindowsError, os.chdir, test_support.TESTFN)
def test_utime(self):
self.assertRaises(WindowsError, os.utime, test_support.TESTFN, None)
def test_access(self):
self.assertRaises(WindowsError, os.utime, test_support.TESTFN, 0)
def test_chmod(self):
self.assertRaises(WindowsError, os.utime, test_support.TESTFN, 0)
if sys.platform != 'win32':
class Win32ErrorTests(unittest.TestCase):
pass
def test_main():
test_support.run_unittest(
FileTests,
TemporaryFileTests,
StatAttributeTests,
EnvironTests,
WalkTests,
MakedirTests,
DevNullTests,
URandomTests,
Win32ErrorTests
)
if __name__ == "__main__":
test_main()