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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
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())
run_unittest(TemporaryFileTests)
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