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| Current File : //compat/linux/proc/self/root/usr/local/lib/python2.5/test/test_tempfile.py |
# tempfile.py unit tests.
from __future__ import with_statement
import tempfile
import os
import sys
import re
import errno
import warnings
import unittest
from test import test_support
warnings.filterwarnings("ignore",
category=RuntimeWarning,
message="mktemp", module=__name__)
if hasattr(os, 'stat'):
import stat
has_stat = 1
else:
has_stat = 0
has_textmode = (tempfile._text_openflags != tempfile._bin_openflags)
has_spawnl = hasattr(os, 'spawnl')
# TEST_FILES may need to be tweaked for systems depending on the maximum
# number of files that can be opened at one time (see ulimit -n)
if sys.platform == 'mac':
TEST_FILES = 32
elif sys.platform in ('openbsd3', 'openbsd4'):
TEST_FILES = 48
else:
TEST_FILES = 100
# This is organized as one test for each chunk of code in tempfile.py,
# in order of their appearance in the file. Testing which requires
# threads is not done here.
# Common functionality.
class TC(unittest.TestCase):
str_check = re.compile(r"[a-zA-Z0-9_-]{6}$")
def failOnException(self, what, ei=None):
if ei is None:
ei = sys.exc_info()
self.fail("%s raised %s: %s" % (what, ei[0], ei[1]))
def nameCheck(self, name, dir, pre, suf):
(ndir, nbase) = os.path.split(name)
npre = nbase[:len(pre)]
nsuf = nbase[len(nbase)-len(suf):]
# check for equality of the absolute paths!
self.assertEqual(os.path.abspath(ndir), os.path.abspath(dir),
"file '%s' not in directory '%s'" % (name, dir))
self.assertEqual(npre, pre,
"file '%s' does not begin with '%s'" % (nbase, pre))
self.assertEqual(nsuf, suf,
"file '%s' does not end with '%s'" % (nbase, suf))
nbase = nbase[len(pre):len(nbase)-len(suf)]
self.assert_(self.str_check.match(nbase),
"random string '%s' does not match /^[a-zA-Z0-9_-]{6}$/"
% nbase)
test_classes = []
class test_exports(TC):
def test_exports(self):
# There are no surprising symbols in the tempfile module
dict = tempfile.__dict__
expected = {
"NamedTemporaryFile" : 1,
"TemporaryFile" : 1,
"mkstemp" : 1,
"mkdtemp" : 1,
"mktemp" : 1,
"TMP_MAX" : 1,
"gettempprefix" : 1,
"gettempdir" : 1,
"tempdir" : 1,
"template" : 1
}
unexp = []
for key in dict:
if key[0] != '_' and key not in expected:
unexp.append(key)
self.failUnless(len(unexp) == 0,
"unexpected keys: %s" % unexp)
test_classes.append(test_exports)
class test__RandomNameSequence(TC):
"""Test the internal iterator object _RandomNameSequence."""
def setUp(self):
self.r = tempfile._RandomNameSequence()
def test_get_six_char_str(self):
# _RandomNameSequence returns a six-character string
s = self.r.next()
self.nameCheck(s, '', '', '')
def test_many(self):
# _RandomNameSequence returns no duplicate strings (stochastic)
dict = {}
r = self.r
for i in xrange(TEST_FILES):
s = r.next()
self.nameCheck(s, '', '', '')
self.failIf(s in dict)
dict[s] = 1
def test_supports_iter(self):
# _RandomNameSequence supports the iterator protocol
i = 0
r = self.r
try:
for s in r:
i += 1
if i == 20:
break
except:
failOnException("iteration")
test_classes.append(test__RandomNameSequence)
class test__candidate_tempdir_list(TC):
"""Test the internal function _candidate_tempdir_list."""
def test_nonempty_list(self):
# _candidate_tempdir_list returns a nonempty list of strings
cand = tempfile._candidate_tempdir_list()
self.failIf(len(cand) == 0)
for c in cand:
self.assert_(isinstance(c, basestring),
"%s is not a string" % c)
def test_wanted_dirs(self):
# _candidate_tempdir_list contains the expected directories
# Make sure the interesting environment variables are all set.
added = []
try:
for envname in 'TMPDIR', 'TEMP', 'TMP':
dirname = os.getenv(envname)
if not dirname:
os.environ[envname] = os.path.abspath(envname)
added.append(envname)
cand = tempfile._candidate_tempdir_list()
for envname in 'TMPDIR', 'TEMP', 'TMP':
dirname = os.getenv(envname)
if not dirname: raise ValueError
self.assert_(dirname in cand)
try:
dirname = os.getcwd()
except (AttributeError, os.error):
dirname = os.curdir
self.assert_(dirname in cand)
# Not practical to try to verify the presence of OS-specific
# paths in this list.
finally:
for p in added:
del os.environ[p]
test_classes.append(test__candidate_tempdir_list)
# We test _get_default_tempdir by testing gettempdir.
class test__get_candidate_names(TC):
"""Test the internal function _get_candidate_names."""
def test_retval(self):
# _get_candidate_names returns a _RandomNameSequence object
obj = tempfile._get_candidate_names()
self.assert_(isinstance(obj, tempfile._RandomNameSequence))
def test_same_thing(self):
# _get_candidate_names always returns the same object
a = tempfile._get_candidate_names()
b = tempfile._get_candidate_names()
self.assert_(a is b)
test_classes.append(test__get_candidate_names)
class test__mkstemp_inner(TC):
"""Test the internal function _mkstemp_inner."""
class mkstemped:
_bflags = tempfile._bin_openflags
_tflags = tempfile._text_openflags
_close = os.close
_unlink = os.unlink
def __init__(self, dir, pre, suf, bin):
if bin: flags = self._bflags
else: flags = self._tflags
(self.fd, self.name) = tempfile._mkstemp_inner(dir, pre, suf, flags)
def write(self, str):
os.write(self.fd, str)
def __del__(self):
self._close(self.fd)
self._unlink(self.name)
def do_create(self, dir=None, pre="", suf="", bin=1):
if dir is None:
dir = tempfile.gettempdir()
try:
file = self.mkstemped(dir, pre, suf, bin)
except:
self.failOnException("_mkstemp_inner")
self.nameCheck(file.name, dir, pre, suf)
return file
def test_basic(self):
# _mkstemp_inner can create files
self.do_create().write("blat")
self.do_create(pre="a").write("blat")
self.do_create(suf="b").write("blat")
self.do_create(pre="a", suf="b").write("blat")
self.do_create(pre="aa", suf=".txt").write("blat")
def test_basic_many(self):
# _mkstemp_inner can create many files (stochastic)
extant = range(TEST_FILES)
for i in extant:
extant[i] = self.do_create(pre="aa")
def test_choose_directory(self):
# _mkstemp_inner can create files in a user-selected directory
dir = tempfile.mkdtemp()
try:
self.do_create(dir=dir).write("blat")
finally:
os.rmdir(dir)
def test_file_mode(self):
# _mkstemp_inner creates files with the proper mode
if not has_stat:
return # ugh, can't use TestSkipped.
file = self.do_create()
mode = stat.S_IMODE(os.stat(file.name).st_mode)
expected = 0600
if sys.platform in ('win32', 'os2emx', 'mac'):
# There's no distinction among 'user', 'group' and 'world';
# replicate the 'user' bits.
user = expected >> 6
expected = user * (1 + 8 + 64)
self.assertEqual(mode, expected)
def test_noinherit(self):
# _mkstemp_inner file handles are not inherited by child processes
if not has_spawnl:
return # ugh, can't use TestSkipped.
if test_support.verbose:
v="v"
else:
v="q"
file = self.do_create()
fd = "%d" % file.fd
try:
me = __file__
except NameError:
me = sys.argv[0]
# We have to exec something, so that FD_CLOEXEC will take
# effect. The core of this test is therefore in
# tf_inherit_check.py, which see.
tester = os.path.join(os.path.dirname(os.path.abspath(me)),
"tf_inherit_check.py")
# On Windows a spawn* /path/ with embedded spaces shouldn't be quoted,
# but an arg with embedded spaces should be decorated with double
# quotes on each end
if sys.platform in ('win32',):
decorated = '"%s"' % sys.executable
tester = '"%s"' % tester
else:
decorated = sys.executable
retval = os.spawnl(os.P_WAIT, sys.executable, decorated, tester, v, fd)
self.failIf(retval < 0,
"child process caught fatal signal %d" % -retval)
self.failIf(retval > 0, "child process reports failure %d"%retval)
def test_textmode(self):
# _mkstemp_inner can create files in text mode
if not has_textmode:
return # ugh, can't use TestSkipped.
self.do_create(bin=0).write("blat\n")
# XXX should test that the file really is a text file
test_classes.append(test__mkstemp_inner)
class test_gettempprefix(TC):
"""Test gettempprefix()."""
def test_sane_template(self):
# gettempprefix returns a nonempty prefix string
p = tempfile.gettempprefix()
self.assert_(isinstance(p, basestring))
self.assert_(len(p) > 0)
def test_usable_template(self):
# gettempprefix returns a usable prefix string
# Create a temp directory, avoiding use of the prefix.
# Then attempt to create a file whose name is
# prefix + 'xxxxxx.xxx' in that directory.
p = tempfile.gettempprefix() + "xxxxxx.xxx"
d = tempfile.mkdtemp(prefix="")
try:
p = os.path.join(d, p)
try:
fd = os.open(p, os.O_RDWR | os.O_CREAT)
except:
self.failOnException("os.open")
os.close(fd)
os.unlink(p)
finally:
os.rmdir(d)
test_classes.append(test_gettempprefix)
class test_gettempdir(TC):
"""Test gettempdir()."""
def test_directory_exists(self):
# gettempdir returns a directory which exists
dir = tempfile.gettempdir()
self.assert_(os.path.isabs(dir) or dir == os.curdir,
"%s is not an absolute path" % dir)
self.assert_(os.path.isdir(dir),
"%s is not a directory" % dir)
def test_directory_writable(self):
# gettempdir returns a directory writable by the user
# sneaky: just instantiate a NamedTemporaryFile, which
# defaults to writing into the directory returned by
# gettempdir.
try:
file = tempfile.NamedTemporaryFile()
file.write("blat")
file.close()
except:
self.failOnException("create file in %s" % tempfile.gettempdir())
def test_same_thing(self):
# gettempdir always returns the same object
a = tempfile.gettempdir()
b = tempfile.gettempdir()
self.assert_(a is b)
test_classes.append(test_gettempdir)
class test_mkstemp(TC):
"""Test mkstemp()."""
def do_create(self, dir=None, pre="", suf=""):
if dir is None:
dir = tempfile.gettempdir()
try:
(fd, name) = tempfile.mkstemp(dir=dir, prefix=pre, suffix=suf)
(ndir, nbase) = os.path.split(name)
adir = os.path.abspath(dir)
self.assertEqual(adir, ndir,
"Directory '%s' incorrectly returned as '%s'" % (adir, ndir))
except:
self.failOnException("mkstemp")
try:
self.nameCheck(name, dir, pre, suf)
finally:
os.close(fd)
os.unlink(name)
def test_basic(self):
# mkstemp can create files
self.do_create()
self.do_create(pre="a")
self.do_create(suf="b")
self.do_create(pre="a", suf="b")
self.do_create(pre="aa", suf=".txt")
self.do_create(dir=".")
def test_choose_directory(self):
# mkstemp can create directories in a user-selected directory
dir = tempfile.mkdtemp()
try:
self.do_create(dir=dir)
finally:
os.rmdir(dir)
test_classes.append(test_mkstemp)
class test_mkdtemp(TC):
"""Test mkdtemp()."""
def do_create(self, dir=None, pre="", suf=""):
if dir is None:
dir = tempfile.gettempdir()
try:
name = tempfile.mkdtemp(dir=dir, prefix=pre, suffix=suf)
except:
self.failOnException("mkdtemp")
try:
self.nameCheck(name, dir, pre, suf)
return name
except:
os.rmdir(name)
raise
def test_basic(self):
# mkdtemp can create directories
os.rmdir(self.do_create())
os.rmdir(self.do_create(pre="a"))
os.rmdir(self.do_create(suf="b"))
os.rmdir(self.do_create(pre="a", suf="b"))
os.rmdir(self.do_create(pre="aa", suf=".txt"))
def test_basic_many(self):
# mkdtemp can create many directories (stochastic)
extant = range(TEST_FILES)
try:
for i in extant:
extant[i] = self.do_create(pre="aa")
finally:
for i in extant:
if(isinstance(i, basestring)):
os.rmdir(i)
def test_choose_directory(self):
# mkdtemp can create directories in a user-selected directory
dir = tempfile.mkdtemp()
try:
os.rmdir(self.do_create(dir=dir))
finally:
os.rmdir(dir)
def test_mode(self):
# mkdtemp creates directories with the proper mode
if not has_stat:
return # ugh, can't use TestSkipped.
dir = self.do_create()
try:
mode = stat.S_IMODE(os.stat(dir).st_mode)
mode &= 0777 # Mask off sticky bits inherited from /tmp
expected = 0700
if sys.platform in ('win32', 'os2emx', 'mac'):
# There's no distinction among 'user', 'group' and 'world';
# replicate the 'user' bits.
user = expected >> 6
expected = user * (1 + 8 + 64)
self.assertEqual(mode, expected)
finally:
os.rmdir(dir)
test_classes.append(test_mkdtemp)
class test_mktemp(TC):
"""Test mktemp()."""
# For safety, all use of mktemp must occur in a private directory.
# We must also suppress the RuntimeWarning it generates.
def setUp(self):
self.dir = tempfile.mkdtemp()
def tearDown(self):
if self.dir:
os.rmdir(self.dir)
self.dir = None
class mktemped:
_unlink = os.unlink
_bflags = tempfile._bin_openflags
def __init__(self, dir, pre, suf):
self.name = tempfile.mktemp(dir=dir, prefix=pre, suffix=suf)
# Create the file. This will raise an exception if it's
# mysteriously appeared in the meanwhile.
os.close(os.open(self.name, self._bflags, 0600))
def __del__(self):
self._unlink(self.name)
def do_create(self, pre="", suf=""):
try:
file = self.mktemped(self.dir, pre, suf)
except:
self.failOnException("mktemp")
self.nameCheck(file.name, self.dir, pre, suf)
return file
def test_basic(self):
# mktemp can choose usable file names
self.do_create()
self.do_create(pre="a")
self.do_create(suf="b")
self.do_create(pre="a", suf="b")
self.do_create(pre="aa", suf=".txt")
def test_many(self):
# mktemp can choose many usable file names (stochastic)
extant = range(TEST_FILES)
for i in extant:
extant[i] = self.do_create(pre="aa")
## def test_warning(self):
## # mktemp issues a warning when used
## warnings.filterwarnings("error",
## category=RuntimeWarning,
## message="mktemp")
## self.assertRaises(RuntimeWarning,
## tempfile.mktemp, dir=self.dir)
test_classes.append(test_mktemp)
# We test _TemporaryFileWrapper by testing NamedTemporaryFile.
class test_NamedTemporaryFile(TC):
"""Test NamedTemporaryFile()."""
def do_create(self, dir=None, pre="", suf=""):
if dir is None:
dir = tempfile.gettempdir()
try:
file = tempfile.NamedTemporaryFile(dir=dir, prefix=pre, suffix=suf)
except:
self.failOnException("NamedTemporaryFile")
self.nameCheck(file.name, dir, pre, suf)
return file
def test_basic(self):
# NamedTemporaryFile can create files
self.do_create()
self.do_create(pre="a")
self.do_create(suf="b")
self.do_create(pre="a", suf="b")
self.do_create(pre="aa", suf=".txt")
def test_creates_named(self):
# NamedTemporaryFile creates files with names
f = tempfile.NamedTemporaryFile()
self.failUnless(os.path.exists(f.name),
"NamedTemporaryFile %s does not exist" % f.name)
def test_del_on_close(self):
# A NamedTemporaryFile is deleted when closed
dir = tempfile.mkdtemp()
try:
f = tempfile.NamedTemporaryFile(dir=dir)
f.write('blat')
f.close()
self.failIf(os.path.exists(f.name),
"NamedTemporaryFile %s exists after close" % f.name)
finally:
os.rmdir(dir)
def test_multiple_close(self):
# A NamedTemporaryFile can be closed many times without error
f = tempfile.NamedTemporaryFile()
f.write('abc\n')
f.close()
try:
f.close()
f.close()
except:
self.failOnException("close")
def test_context_manager(self):
# A NamedTemporaryFile can be used as a context manager
with tempfile.NamedTemporaryFile() as f:
self.failUnless(os.path.exists(f.name))
self.failIf(os.path.exists(f.name))
def use_closed():
with f:
pass
self.failUnlessRaises(ValueError, use_closed)
# How to test the mode and bufsize parameters?
test_classes.append(test_NamedTemporaryFile)
class test_TemporaryFile(TC):
"""Test TemporaryFile()."""
def test_basic(self):
# TemporaryFile can create files
# No point in testing the name params - the file has no name.
try:
tempfile.TemporaryFile()
except:
self.failOnException("TemporaryFile")
def test_has_no_name(self):
# TemporaryFile creates files with no names (on this system)
dir = tempfile.mkdtemp()
f = tempfile.TemporaryFile(dir=dir)
f.write('blat')
# Sneaky: because this file has no name, it should not prevent
# us from removing the directory it was created in.
try:
os.rmdir(dir)
except:
ei = sys.exc_info()
# cleanup
f.close()
os.rmdir(dir)
self.failOnException("rmdir", ei)
def test_multiple_close(self):
# A TemporaryFile can be closed many times without error
f = tempfile.TemporaryFile()
f.write('abc\n')
f.close()
try:
f.close()
f.close()
except:
self.failOnException("close")
# How to test the mode and bufsize parameters?
if tempfile.NamedTemporaryFile is not tempfile.TemporaryFile:
test_classes.append(test_TemporaryFile)
def test_main():
test_support.run_unittest(*test_classes)
if __name__ == "__main__":
test_main()