Viewing file:  test_os.py (5.2 KB) -rw-r--r--
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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
# more portable than they had been thought to be.
import os
import unittest
import warnings
warnings.filterwarnings("ignore", "tempnam", RuntimeWarning, __name__)
warnings.filterwarnings("ignore", "tmpnam", RuntimeWarning, __name__)
from test_support import TESTFN, run_unittest
class TemporaryFileTests(unittest.TestCase):
def setUp(self):
self.files = []
os.mkdir(TESTFN)
def tearDown(self):
for name in self.files:
os.unlink(name)
os.rmdir(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,
"test_os")
self.check_tempfile(os.tempnam())
name = os.tempnam(TESTFN)
self.check_tempfile(name)
name = os.tempnam(TESTFN, "pfx")
self.assert_(os.path.basename(name)[:3] == "pfx")
self.check_tempfile(name)
def test_tmpfile(self):
if not hasattr(os, "tmpfile"):
return
fp = os.tmpfile()
fp.write("foobar")
fp.seek(0,0)
s = fp.read()
fp.close()
self.assert_(s == "foobar")
def test_tmpnam(self):
if not hasattr(os, "tmpnam"):
return
warnings.filterwarnings("ignore", "tmpnam", RuntimeWarning,
"test_os")
self.check_tempfile(os.tmpnam())
# Test attributes on return values from os.*stat* family.
class StatAttributeTests(unittest.TestCase):
def setUp(self):
os.mkdir(TESTFN)
self.fname = os.path.join(TESTFN, "f1")
f = open(self.fname, 'wb')
f.write("ABC")
f.close()
def tearDown(self):
os.unlink(self.fname)
os.rmdir(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()
self.assertEquals(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
result = os.statvfs(self.fname)
# 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
def test_main():
run_unittest(TemporaryFileTests)
run_unittest(StatAttributeTests)
if __name__ == "__main__":
test_main()
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