| # tempfile.py unit tests. |
| import tempfile |
| import os |
| import signal |
| import sys |
| import re |
| import warnings |
| |
| import unittest |
| from test import support |
| |
| |
| 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.startswith('openbsd'): |
| 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 BaseTestCase(unittest.TestCase): |
| |
| str_check = re.compile(r"[a-zA-Z0-9_-]{6}$") |
| |
| def setUp(self): |
| self._warnings_manager = support.check_warnings() |
| self._warnings_manager.__enter__() |
| warnings.filterwarnings("ignore", category=RuntimeWarning, |
| message="mktemp", module=__name__) |
| |
| def tearDown(self): |
| self._warnings_manager.__exit__(None, None, None) |
| |
| |
| def nameCheck(self, name, dir, pre, suf): |
| (ndir, nbase) = os.path.split(name) |
| npre = nbase[:len(pre)] |
| nsuf = nbase[len(nbase)-len(suf):] |
| |
| # check for equality of the absolute paths! |
| self.assertEqual(os.path.abspath(ndir), os.path.abspath(dir), |
| "file '%s' not in directory '%s'" % (name, dir)) |
| self.assertEqual(npre, pre, |
| "file '%s' does not begin with '%s'" % (nbase, pre)) |
| self.assertEqual(nsuf, suf, |
| "file '%s' does not end with '%s'" % (nbase, suf)) |
| |
| nbase = nbase[len(pre):len(nbase)-len(suf)] |
| self.assertTrue(self.str_check.match(nbase), |
| "random string '%s' does not match /^[a-zA-Z0-9_-]{6}$/" |
| % nbase) |
| |
| |
| class TestExports(BaseTestCase): |
| 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, |
| "SpooledTemporaryFile" : 1, |
| "TemporaryDirectory" : 1, |
| } |
| |
| unexp = [] |
| for key in dict: |
| if key[0] != '_' and key not in expected: |
| unexp.append(key) |
| self.assertTrue(len(unexp) == 0, |
| "unexpected keys: %s" % unexp) |
| |
| |
| class TestRandomNameSequence(BaseTestCase): |
| """Test the internal iterator object _RandomNameSequence.""" |
| |
| def setUp(self): |
| self.r = tempfile._RandomNameSequence() |
| super().setUp() |
| |
| def test_get_six_char_str(self): |
| # _RandomNameSequence returns a six-character string |
| s = next(self.r) |
| self.nameCheck(s, '', '', '') |
| |
| def test_many(self): |
| # _RandomNameSequence returns no duplicate strings (stochastic) |
| |
| dict = {} |
| r = self.r |
| for i in range(TEST_FILES): |
| s = next(r) |
| self.nameCheck(s, '', '', '') |
| self.assertNotIn(s, dict) |
| dict[s] = 1 |
| |
| def supports_iter(self): |
| # _RandomNameSequence supports the iterator protocol |
| |
| i = 0 |
| r = self.r |
| for s in r: |
| i += 1 |
| if i == 20: |
| break |
| |
| @unittest.skipUnless(hasattr(os, 'fork'), |
| "os.fork is required for this test") |
| def test_process_awareness(self): |
| # ensure that the random source differs between |
| # child and parent. |
| read_fd, write_fd = os.pipe() |
| pid = None |
| try: |
| pid = os.fork() |
| if not pid: |
| os.close(read_fd) |
| os.write(write_fd, next(self.r).encode("ascii")) |
| os.close(write_fd) |
| # bypass the normal exit handlers- leave those to |
| # the parent. |
| os._exit(0) |
| parent_value = next(self.r) |
| child_value = os.read(read_fd, len(parent_value)).decode("ascii") |
| finally: |
| if pid: |
| # best effort to ensure the process can't bleed out |
| # via any bugs above |
| try: |
| os.kill(pid, signal.SIGKILL) |
| except EnvironmentError: |
| pass |
| os.close(read_fd) |
| os.close(write_fd) |
| self.assertNotEqual(child_value, parent_value) |
| |
| |
| |
| class TestCandidateTempdirList(BaseTestCase): |
| """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.assertFalse(len(cand) == 0) |
| for c in cand: |
| self.assertIsInstance(c, str) |
| |
| def test_wanted_dirs(self): |
| # _candidate_tempdir_list contains the expected directories |
| |
| # Make sure the interesting environment variables are all set. |
| with support.EnvironmentVarGuard() as env: |
| for envname in 'TMPDIR', 'TEMP', 'TMP': |
| dirname = os.getenv(envname) |
| if not dirname: |
| env[envname] = os.path.abspath(envname) |
| |
| cand = tempfile._candidate_tempdir_list() |
| |
| for envname in 'TMPDIR', 'TEMP', 'TMP': |
| dirname = os.getenv(envname) |
| if not dirname: raise ValueError |
| self.assertIn(dirname, cand) |
| |
| try: |
| dirname = os.getcwd() |
| except (AttributeError, os.error): |
| dirname = os.curdir |
| |
| self.assertIn(dirname, cand) |
| |
| # Not practical to try to verify the presence of OS-specific |
| # paths in this list. |
| |
| |
| # We test _get_default_tempdir by testing gettempdir. |
| |
| |
| class TestGetCandidateNames(BaseTestCase): |
| """Test the internal function _get_candidate_names.""" |
| |
| def test_retval(self): |
| # _get_candidate_names returns a _RandomNameSequence object |
| obj = tempfile._get_candidate_names() |
| self.assertIsInstance(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.assertTrue(a is b) |
| |
| |
| class TestMkstempInner(BaseTestCase): |
| """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() |
| file = self.mkstemped(dir, pre, suf, bin) |
| |
| self.nameCheck(file.name, dir, pre, suf) |
| return file |
| |
| def test_basic(self): |
| # _mkstemp_inner can create files |
| self.do_create().write(b"blat") |
| self.do_create(pre="a").write(b"blat") |
| self.do_create(suf="b").write(b"blat") |
| self.do_create(pre="a", suf="b").write(b"blat") |
| self.do_create(pre="aa", suf=".txt").write(b"blat") |
| |
| def test_basic_many(self): |
| # _mkstemp_inner can create many files (stochastic) |
| extant = list(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(b"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 SkipTest. |
| |
| file = self.do_create() |
| mode = stat.S_IMODE(os.stat(file.name).st_mode) |
| expected = 0o600 |
| if sys.platform in ('win32', 'os2emx'): |
| # 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 SkipTest. |
| |
| if 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.assertFalse(retval < 0, |
| "child process caught fatal signal %d" % -retval) |
| self.assertFalse(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 SkipTest. |
| |
| # A text file is truncated at the first Ctrl+Z byte |
| f = self.do_create(bin=0) |
| f.write(b"blat\x1a") |
| f.write(b"extra\n") |
| os.lseek(f.fd, 0, os.SEEK_SET) |
| self.assertEqual(os.read(f.fd, 20), b"blat") |
| |
| |
| class TestGetTempPrefix(BaseTestCase): |
| """Test gettempprefix().""" |
| |
| def test_sane_template(self): |
| # gettempprefix returns a nonempty prefix string |
| p = tempfile.gettempprefix() |
| |
| self.assertIsInstance(p, str) |
| self.assertTrue(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) |
| fd = os.open(p, os.O_RDWR | os.O_CREAT) |
| os.close(fd) |
| os.unlink(p) |
| finally: |
| os.rmdir(d) |
| |
| |
| class TestGetTempDir(BaseTestCase): |
| """Test gettempdir().""" |
| |
| def test_directory_exists(self): |
| # gettempdir returns a directory which exists |
| |
| dir = tempfile.gettempdir() |
| self.assertTrue(os.path.isabs(dir) or dir == os.curdir, |
| "%s is not an absolute path" % dir) |
| self.assertTrue(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. |
| file = tempfile.NamedTemporaryFile() |
| file.write(b"blat") |
| file.close() |
| |
| def test_same_thing(self): |
| # gettempdir always returns the same object |
| a = tempfile.gettempdir() |
| b = tempfile.gettempdir() |
| |
| self.assertTrue(a is b) |
| |
| |
| class TestMkstemp(BaseTestCase): |
| """Test mkstemp().""" |
| |
| def do_create(self, dir=None, pre="", suf=""): |
| if dir is None: |
| dir = tempfile.gettempdir() |
| (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)) |
| |
| 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) |
| |
| |
| class TestMkdtemp(BaseTestCase): |
| """Test mkdtemp().""" |
| |
| def do_create(self, dir=None, pre="", suf=""): |
| if dir is None: |
| dir = tempfile.gettempdir() |
| name = tempfile.mkdtemp(dir=dir, prefix=pre, suffix=suf) |
| |
| 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 = list(range(TEST_FILES)) |
| try: |
| for i in extant: |
| extant[i] = self.do_create(pre="aa") |
| finally: |
| for i in extant: |
| if(isinstance(i, str)): |
| 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 SkipTest. |
| |
| dir = self.do_create() |
| try: |
| mode = stat.S_IMODE(os.stat(dir).st_mode) |
| mode &= 0o777 # Mask off sticky bits inherited from /tmp |
| expected = 0o700 |
| if sys.platform in ('win32', 'os2emx'): |
| # 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) |
| |
| |
| class TestMktemp(BaseTestCase): |
| """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() |
| super().setUp() |
| |
| def tearDown(self): |
| if self.dir: |
| os.rmdir(self.dir) |
| self.dir = None |
| super().tearDown() |
| |
| 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, 0o600)) |
| |
| def __del__(self): |
| self._unlink(self.name) |
| |
| def do_create(self, pre="", suf=""): |
| file = self.mktemped(self.dir, pre, suf) |
| |
| 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 = list(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) |
| |
| |
| # We test _TemporaryFileWrapper by testing NamedTemporaryFile. |
| |
| |
| class TestNamedTemporaryFile(BaseTestCase): |
| """Test NamedTemporaryFile().""" |
| |
| def do_create(self, dir=None, pre="", suf="", delete=True): |
| if dir is None: |
| dir = tempfile.gettempdir() |
| file = tempfile.NamedTemporaryFile(dir=dir, prefix=pre, suffix=suf, |
| delete=delete) |
| |
| 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.assertTrue(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(b'blat') |
| f.close() |
| self.assertFalse(os.path.exists(f.name), |
| "NamedTemporaryFile %s exists after close" % f.name) |
| finally: |
| os.rmdir(dir) |
| |
| def test_dis_del_on_close(self): |
| # Tests that delete-on-close can be disabled |
| dir = tempfile.mkdtemp() |
| tmp = None |
| try: |
| f = tempfile.NamedTemporaryFile(dir=dir, delete=False) |
| tmp = f.name |
| f.write(b'blat') |
| f.close() |
| self.assertTrue(os.path.exists(f.name), |
| "NamedTemporaryFile %s missing after close" % f.name) |
| finally: |
| if tmp is not None: |
| os.unlink(tmp) |
| os.rmdir(dir) |
| |
| def test_multiple_close(self): |
| # A NamedTemporaryFile can be closed many times without error |
| f = tempfile.NamedTemporaryFile() |
| f.write(b'abc\n') |
| f.close() |
| f.close() |
| f.close() |
| |
| def test_context_manager(self): |
| # A NamedTemporaryFile can be used as a context manager |
| with tempfile.NamedTemporaryFile() as f: |
| self.assertTrue(os.path.exists(f.name)) |
| self.assertFalse(os.path.exists(f.name)) |
| def use_closed(): |
| with f: |
| pass |
| self.assertRaises(ValueError, use_closed) |
| |
| # How to test the mode and bufsize parameters? |
| |
| |
| class TestSpooledTemporaryFile(BaseTestCase): |
| """Test SpooledTemporaryFile().""" |
| |
| def do_create(self, max_size=0, dir=None, pre="", suf=""): |
| if dir is None: |
| dir = tempfile.gettempdir() |
| file = tempfile.SpooledTemporaryFile(max_size=max_size, dir=dir, prefix=pre, suffix=suf) |
| |
| return file |
| |
| |
| def test_basic(self): |
| # SpooledTemporaryFile can create files |
| f = self.do_create() |
| self.assertFalse(f._rolled) |
| f = self.do_create(max_size=100, pre="a", suf=".txt") |
| self.assertFalse(f._rolled) |
| |
| def test_del_on_close(self): |
| # A SpooledTemporaryFile is deleted when closed |
| dir = tempfile.mkdtemp() |
| try: |
| f = tempfile.SpooledTemporaryFile(max_size=10, dir=dir) |
| self.assertFalse(f._rolled) |
| f.write(b'blat ' * 5) |
| self.assertTrue(f._rolled) |
| filename = f.name |
| f.close() |
| self.assertFalse(isinstance(filename, str) and os.path.exists(filename), |
| "SpooledTemporaryFile %s exists after close" % filename) |
| finally: |
| os.rmdir(dir) |
| |
| def test_rewrite_small(self): |
| # A SpooledTemporaryFile can be written to multiple within the max_size |
| f = self.do_create(max_size=30) |
| self.assertFalse(f._rolled) |
| for i in range(5): |
| f.seek(0, 0) |
| f.write(b'x' * 20) |
| self.assertFalse(f._rolled) |
| |
| def test_write_sequential(self): |
| # A SpooledTemporaryFile should hold exactly max_size bytes, and roll |
| # over afterward |
| f = self.do_create(max_size=30) |
| self.assertFalse(f._rolled) |
| f.write(b'x' * 20) |
| self.assertFalse(f._rolled) |
| f.write(b'x' * 10) |
| self.assertFalse(f._rolled) |
| f.write(b'x') |
| self.assertTrue(f._rolled) |
| |
| def test_writelines(self): |
| # Verify writelines with a SpooledTemporaryFile |
| f = self.do_create() |
| f.writelines((b'x', b'y', b'z')) |
| f.seek(0) |
| buf = f.read() |
| self.assertEqual(buf, b'xyz') |
| |
| def test_writelines_sequential(self): |
| # A SpooledTemporaryFile should hold exactly max_size bytes, and roll |
| # over afterward |
| f = self.do_create(max_size=35) |
| f.writelines((b'x' * 20, b'x' * 10, b'x' * 5)) |
| self.assertFalse(f._rolled) |
| f.write(b'x') |
| self.assertTrue(f._rolled) |
| |
| def test_sparse(self): |
| # A SpooledTemporaryFile that is written late in the file will extend |
| # when that occurs |
| f = self.do_create(max_size=30) |
| self.assertFalse(f._rolled) |
| f.seek(100, 0) |
| self.assertFalse(f._rolled) |
| f.write(b'x') |
| self.assertTrue(f._rolled) |
| |
| def test_fileno(self): |
| # A SpooledTemporaryFile should roll over to a real file on fileno() |
| f = self.do_create(max_size=30) |
| self.assertFalse(f._rolled) |
| self.assertTrue(f.fileno() > 0) |
| self.assertTrue(f._rolled) |
| |
| def test_multiple_close_before_rollover(self): |
| # A SpooledTemporaryFile can be closed many times without error |
| f = tempfile.SpooledTemporaryFile() |
| f.write(b'abc\n') |
| self.assertFalse(f._rolled) |
| f.close() |
| f.close() |
| f.close() |
| |
| def test_multiple_close_after_rollover(self): |
| # A SpooledTemporaryFile can be closed many times without error |
| f = tempfile.SpooledTemporaryFile(max_size=1) |
| f.write(b'abc\n') |
| self.assertTrue(f._rolled) |
| f.close() |
| f.close() |
| f.close() |
| |
| def test_bound_methods(self): |
| # It should be OK to steal a bound method from a SpooledTemporaryFile |
| # and use it independently; when the file rolls over, those bound |
| # methods should continue to function |
| f = self.do_create(max_size=30) |
| read = f.read |
| write = f.write |
| seek = f.seek |
| |
| write(b"a" * 35) |
| write(b"b" * 35) |
| seek(0, 0) |
| self.assertEqual(read(70), b'a'*35 + b'b'*35) |
| |
| def test_text_mode(self): |
| # Creating a SpooledTemporaryFile with a text mode should produce |
| # a file object reading and writing (Unicode) text strings. |
| f = tempfile.SpooledTemporaryFile(mode='w+', max_size=10) |
| f.write("abc\n") |
| f.seek(0) |
| self.assertEqual(f.read(), "abc\n") |
| f.write("def\n") |
| f.seek(0) |
| self.assertEqual(f.read(), "abc\ndef\n") |
| f.write("xyzzy\n") |
| f.seek(0) |
| self.assertEqual(f.read(), "abc\ndef\nxyzzy\n") |
| # Check that Ctrl+Z doesn't truncate the file |
| f.write("foo\x1abar\n") |
| f.seek(0) |
| self.assertEqual(f.read(), "abc\ndef\nxyzzy\nfoo\x1abar\n") |
| |
| def test_text_newline_and_encoding(self): |
| f = tempfile.SpooledTemporaryFile(mode='w+', max_size=10, |
| newline='', encoding='utf-8') |
| f.write("\u039B\r\n") |
| f.seek(0) |
| self.assertEqual(f.read(), "\u039B\r\n") |
| self.assertFalse(f._rolled) |
| |
| f.write("\u039B" * 20 + "\r\n") |
| f.seek(0) |
| self.assertEqual(f.read(), "\u039B\r\n" + ("\u039B" * 20) + "\r\n") |
| self.assertTrue(f._rolled) |
| |
| def test_context_manager_before_rollover(self): |
| # A SpooledTemporaryFile can be used as a context manager |
| with tempfile.SpooledTemporaryFile(max_size=1) as f: |
| self.assertFalse(f._rolled) |
| self.assertFalse(f.closed) |
| self.assertTrue(f.closed) |
| def use_closed(): |
| with f: |
| pass |
| self.assertRaises(ValueError, use_closed) |
| |
| def test_context_manager_during_rollover(self): |
| # A SpooledTemporaryFile can be used as a context manager |
| with tempfile.SpooledTemporaryFile(max_size=1) as f: |
| self.assertFalse(f._rolled) |
| f.write(b'abc\n') |
| f.flush() |
| self.assertTrue(f._rolled) |
| self.assertFalse(f.closed) |
| self.assertTrue(f.closed) |
| def use_closed(): |
| with f: |
| pass |
| self.assertRaises(ValueError, use_closed) |
| |
| def test_context_manager_after_rollover(self): |
| # A SpooledTemporaryFile can be used as a context manager |
| f = tempfile.SpooledTemporaryFile(max_size=1) |
| f.write(b'abc\n') |
| f.flush() |
| self.assertTrue(f._rolled) |
| with f: |
| self.assertFalse(f.closed) |
| self.assertTrue(f.closed) |
| def use_closed(): |
| with f: |
| pass |
| self.assertRaises(ValueError, use_closed) |
| |
| def test_truncate_with_size_parameter(self): |
| # A SpooledTemporaryFile can be truncated to zero size |
| f = tempfile.SpooledTemporaryFile(max_size=10) |
| f.write(b'abcdefg\n') |
| f.seek(0) |
| f.truncate() |
| self.assertFalse(f._rolled) |
| self.assertEqual(f._file.getvalue(), b'') |
| # A SpooledTemporaryFile can be truncated to a specific size |
| f = tempfile.SpooledTemporaryFile(max_size=10) |
| f.write(b'abcdefg\n') |
| f.truncate(4) |
| self.assertFalse(f._rolled) |
| self.assertEqual(f._file.getvalue(), b'abcd') |
| # A SpooledTemporaryFile rolls over if truncated to large size |
| f = tempfile.SpooledTemporaryFile(max_size=10) |
| f.write(b'abcdefg\n') |
| f.truncate(20) |
| self.assertTrue(f._rolled) |
| if has_stat: |
| self.assertEqual(os.fstat(f.fileno()).st_size, 20) |
| |
| |
| if tempfile.NamedTemporaryFile is not tempfile.TemporaryFile: |
| |
| class TestTemporaryFile(BaseTestCase): |
| """Test TemporaryFile().""" |
| |
| def test_basic(self): |
| # TemporaryFile can create files |
| # No point in testing the name params - the file has no name. |
| tempfile.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(b'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: |
| # cleanup |
| f.close() |
| os.rmdir(dir) |
| raise |
| |
| def test_multiple_close(self): |
| # A TemporaryFile can be closed many times without error |
| f = tempfile.TemporaryFile() |
| f.write(b'abc\n') |
| f.close() |
| f.close() |
| f.close() |
| |
| # How to test the mode and bufsize parameters? |
| def test_mode_and_encoding(self): |
| |
| def roundtrip(input, *args, **kwargs): |
| with tempfile.TemporaryFile(*args, **kwargs) as fileobj: |
| fileobj.write(input) |
| fileobj.seek(0) |
| self.assertEqual(input, fileobj.read()) |
| |
| roundtrip(b"1234", "w+b") |
| roundtrip("abdc\n", "w+") |
| roundtrip("\u039B", "w+", encoding="utf-16") |
| roundtrip("foo\r\n", "w+", newline="") |
| |
| |
| # Helper for test_del_on_shutdown |
| class NulledModules: |
| def __init__(self, *modules): |
| self.refs = [mod.__dict__ for mod in modules] |
| self.contents = [ref.copy() for ref in self.refs] |
| |
| def __enter__(self): |
| for d in self.refs: |
| for key in d: |
| d[key] = None |
| |
| def __exit__(self, *exc_info): |
| for d, c in zip(self.refs, self.contents): |
| d.clear() |
| d.update(c) |
| |
| class TestTemporaryDirectory(BaseTestCase): |
| """Test TemporaryDirectory().""" |
| |
| def do_create(self, dir=None, pre="", suf="", recurse=1): |
| if dir is None: |
| dir = tempfile.gettempdir() |
| tmp = tempfile.TemporaryDirectory(dir=dir, prefix=pre, suffix=suf) |
| self.nameCheck(tmp.name, dir, pre, suf) |
| # Create a subdirectory and some files |
| if recurse: |
| self.do_create(tmp.name, pre, suf, recurse-1) |
| with open(os.path.join(tmp.name, "test.txt"), "wb") as f: |
| f.write(b"Hello world!") |
| return tmp |
| |
| def test_mkdtemp_failure(self): |
| # Check no additional exception if mkdtemp fails |
| # Previously would raise AttributeError instead |
| # (noted as part of Issue #10188) |
| with tempfile.TemporaryDirectory() as nonexistent: |
| pass |
| with self.assertRaises(os.error): |
| tempfile.TemporaryDirectory(dir=nonexistent) |
| |
| def test_explicit_cleanup(self): |
| # A TemporaryDirectory is deleted when cleaned up |
| dir = tempfile.mkdtemp() |
| try: |
| d = self.do_create(dir=dir) |
| self.assertTrue(os.path.exists(d.name), |
| "TemporaryDirectory %s does not exist" % d.name) |
| d.cleanup() |
| self.assertFalse(os.path.exists(d.name), |
| "TemporaryDirectory %s exists after cleanup" % d.name) |
| finally: |
| os.rmdir(dir) |
| |
| @support.skip_unless_symlink |
| def test_cleanup_with_symlink_to_a_directory(self): |
| # cleanup() should not follow symlinks to directories (issue #12464) |
| d1 = self.do_create() |
| d2 = self.do_create() |
| |
| # Symlink d1/foo -> d2 |
| os.symlink(d2.name, os.path.join(d1.name, "foo")) |
| |
| # This call to cleanup() should not follow the "foo" symlink |
| d1.cleanup() |
| |
| self.assertFalse(os.path.exists(d1.name), |
| "TemporaryDirectory %s exists after cleanup" % d1.name) |
| self.assertTrue(os.path.exists(d2.name), |
| "Directory pointed to by a symlink was deleted") |
| self.assertEqual(os.listdir(d2.name), ['test.txt'], |
| "Contents of the directory pointed to by a symlink " |
| "were deleted") |
| d2.cleanup() |
| |
| @support.cpython_only |
| def test_del_on_collection(self): |
| # A TemporaryDirectory is deleted when garbage collected |
| dir = tempfile.mkdtemp() |
| try: |
| d = self.do_create(dir=dir) |
| name = d.name |
| del d # Rely on refcounting to invoke __del__ |
| self.assertFalse(os.path.exists(name), |
| "TemporaryDirectory %s exists after __del__" % name) |
| finally: |
| os.rmdir(dir) |
| |
| @unittest.expectedFailure # See issue #10188 |
| def test_del_on_shutdown(self): |
| # A TemporaryDirectory may be cleaned up during shutdown |
| # Make sure it works with the relevant modules nulled out |
| with self.do_create() as dir: |
| d = self.do_create(dir=dir) |
| # Mimic the nulling out of modules that |
| # occurs during system shutdown |
| modules = [os, os.path] |
| if has_stat: |
| modules.append(stat) |
| # Currently broken, so suppress the warning |
| # that is otherwise emitted on stdout |
| with support.captured_stderr() as err: |
| with NulledModules(*modules): |
| d.cleanup() |
| # Currently broken, so stop spurious exception by |
| # indicating the object has already been closed |
| d._closed = True |
| # And this assert will fail, as expected by the |
| # unittest decorator... |
| self.assertFalse(os.path.exists(d.name), |
| "TemporaryDirectory %s exists after cleanup" % d.name) |
| |
| def test_warnings_on_cleanup(self): |
| # Two kinds of warning on shutdown |
| # Issue 10888: may write to stderr if modules are nulled out |
| # ResourceWarning will be triggered by __del__ |
| with self.do_create() as dir: |
| if os.sep != '\\': |
| # Embed a backslash in order to make sure string escaping |
| # in the displayed error message is dealt with correctly |
| suffix = '\\check_backslash_handling' |
| else: |
| suffix = '' |
| d = self.do_create(dir=dir, suf=suffix) |
| |
| #Check for the Issue 10888 message |
| modules = [os, os.path] |
| if has_stat: |
| modules.append(stat) |
| with support.captured_stderr() as err: |
| with NulledModules(*modules): |
| d.cleanup() |
| message = err.getvalue().replace('\\\\', '\\') |
| self.assertIn("while cleaning up", message) |
| self.assertIn(d.name, message) |
| |
| # Check for the resource warning |
| with support.check_warnings(('Implicitly', ResourceWarning), quiet=False): |
| warnings.filterwarnings("always", category=ResourceWarning) |
| d.__del__() |
| self.assertFalse(os.path.exists(d.name), |
| "TemporaryDirectory %s exists after __del__" % d.name) |
| |
| def test_multiple_close(self): |
| # Can be cleaned-up many times without error |
| d = self.do_create() |
| d.cleanup() |
| d.cleanup() |
| d.cleanup() |
| |
| def test_context_manager(self): |
| # Can be used as a context manager |
| d = self.do_create() |
| with d as name: |
| self.assertTrue(os.path.exists(name)) |
| self.assertEqual(name, d.name) |
| self.assertFalse(os.path.exists(name)) |
| |
| |
| def test_main(): |
| support.run_unittest(__name__) |
| |
| if __name__ == "__main__": |
| test_main() |