# tempfile.py unit tests. import tempfile import errno import io import os import signal import sys import re import warnings import contextlib import weakref from unittest import mock import unittest from test import support from test.support import script_helper 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-z0-9_-]{8}$") def setUp(self): self._warnings_manager = support.check_warnings() self._warnings_manager.__enter__() warnings.filterwarnings("ignore", category=RuntimeWarning, message="mktemp", module=__name__) def tearDown(self): self._warnings_manager.__exit__(None, None, None) def nameCheck(self, name, dir, pre, suf): (ndir, nbase) = os.path.split(name) npre = nbase[:len(pre)] nsuf = nbase[len(nbase)-len(suf):] # check for equality of the absolute paths! self.assertEqual(os.path.abspath(ndir), os.path.abspath(dir), "file '%s' not in directory '%s'" % (name, dir)) self.assertEqual(npre, pre, "file '%s' does not begin with '%s'" % (nbase, pre)) self.assertEqual(nsuf, suf, "file '%s' does not end with '%s'" % (nbase, suf)) nbase = nbase[len(pre):len(nbase)-len(suf)] self.assertTrue(self.str_check.match(nbase), "random string '%s' does not match ^[a-z0-9_-]{8}$" % 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 OSError: 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, OSError): 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 some more by testing gettempdir. class TestGetDefaultTempdir(BaseTestCase): """Test _get_default_tempdir().""" def test_no_files_left_behind(self): # use a private empty directory with tempfile.TemporaryDirectory() as our_temp_directory: # force _get_default_tempdir() to consider our empty directory def our_candidate_list(): return [our_temp_directory] with support.swap_attr(tempfile, "_candidate_tempdir_list", our_candidate_list): # verify our directory is empty after _get_default_tempdir() tempfile._get_default_tempdir() self.assertEqual(os.listdir(our_temp_directory), []) def raise_OSError(*args, **kwargs): raise OSError() with support.swap_attr(io, "open", raise_OSError): # test again with failing io.open() with self.assertRaises(FileNotFoundError): tempfile._get_default_tempdir() self.assertEqual(os.listdir(our_temp_directory), []) open = io.open def bad_writer(*args, **kwargs): fp = open(*args, **kwargs) fp.write = raise_OSError return fp with support.swap_attr(io, "open", bad_writer): # test again with failing write() with self.assertRaises(FileNotFoundError): tempfile._get_default_tempdir() self.assertEqual(os.listdir(our_temp_directory), []) 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) @contextlib.contextmanager def _inside_empty_temp_dir(): dir = tempfile.mkdtemp() try: with support.swap_attr(tempfile, 'tempdir', dir): yield finally: support.rmtree(dir) def _mock_candidate_names(*names): return support.swap_attr(tempfile, '_get_candidate_names', lambda: iter(names)) 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) @unittest.skipUnless(has_stat, 'os.stat not available') def test_file_mode(self): # _mkstemp_inner creates files with the proper mode file = self.do_create() mode = stat.S_IMODE(os.stat(file.name).st_mode) expected = 0o600 if sys.platform == 'win32': # 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) @unittest.skipUnless(has_spawnl, 'os.spawnl not available') def test_noinherit(self): # _mkstemp_inner file handles are not inherited by child processes if support.verbose: v="v" else: v="q" file = self.do_create() self.assertEqual(os.get_inheritable(file.fd), False) 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 == '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) @unittest.skipUnless(has_textmode, "text mode not available") def test_textmode(self): # _mkstemp_inner can create files in text mode # 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") def default_mkstemp_inner(self): return tempfile._mkstemp_inner(tempfile.gettempdir(), tempfile.template, '', tempfile._bin_openflags) def test_collision_with_existing_file(self): # _mkstemp_inner tries another name when a file with # the chosen name already exists with _inside_empty_temp_dir(), \ _mock_candidate_names('aaa', 'aaa', 'bbb'): (fd1, name1) = self.default_mkstemp_inner() os.close(fd1) self.assertTrue(name1.endswith('aaa')) (fd2, name2) = self.default_mkstemp_inner() os.close(fd2) self.assertTrue(name2.endswith('bbb')) def test_collision_with_existing_directory(self): # _mkstemp_inner tries another name when a directory with # the chosen name already exists with _inside_empty_temp_dir(), \ _mock_candidate_names('aaa', 'aaa', 'bbb'): dir = tempfile.mkdtemp() self.assertTrue(dir.endswith('aaa')) (fd, name) = self.default_mkstemp_inner() os.close(fd) self.assertTrue(name.endswith('bbb')) 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) def test_case_sensitive(self): # gettempdir should not flatten its case # even on a case-insensitive file system case_sensitive_tempdir = tempfile.mkdtemp("-Temp") _tempdir, tempfile.tempdir = tempfile.tempdir, None try: with support.EnvironmentVarGuard() as env: # Fake the first env var which is checked as a candidate env["TMPDIR"] = case_sensitive_tempdir self.assertEqual(tempfile.gettempdir(), case_sensitive_tempdir) finally: tempfile.tempdir = _tempdir support.rmdir(case_sensitive_tempdir) 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) @unittest.skipUnless(has_stat, 'os.stat not available') def test_mode(self): # mkdtemp creates directories with the proper mode 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 == 'win32': # 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) def test_collision_with_existing_file(self): # mkdtemp tries another name when a file with # the chosen name already exists with _inside_empty_temp_dir(), \ _mock_candidate_names('aaa', 'aaa', 'bbb'): file = tempfile.NamedTemporaryFile(delete=False) file.close() self.assertTrue(file.name.endswith('aaa')) dir = tempfile.mkdtemp() self.assertTrue(dir.endswith('bbb')) def test_collision_with_existing_directory(self): # mkdtemp tries another name when a directory with # the chosen name already exists with _inside_empty_temp_dir(), \ _mock_candidate_names('aaa', 'aaa', 'bbb'): dir1 = tempfile.mkdtemp() self.assertTrue(dir1.endswith('aaa')) dir2 = tempfile.mkdtemp() self.assertTrue(dir2.endswith('bbb')) 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_method_lookup(self): # Issue #18879: Looking up a temporary file method should keep it # alive long enough. f = self.do_create() wr = weakref.ref(f) write = f.write write2 = f.write del f write(b'foo') del write write2(b'bar') del write2 if support.check_impl_detail(cpython=True): # No reference cycle was created. self.assertIsNone(wr()) def test_iter(self): # Issue #23700: getting iterator from a temporary file should keep # it alive as long as it's being iterated over lines = [b'spam\n', b'eggs\n', b'beans\n'] def make_file(): f = tempfile.NamedTemporaryFile(mode='w+b') f.write(b''.join(lines)) f.seek(0) return f for i, l in enumerate(make_file()): self.assertEqual(l, lines[i]) self.assertEqual(i, len(lines) - 1) 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) def test_no_leak_fd(self): # Issue #21058: don't leak file descriptor when io.open() fails closed = [] os_close = os.close def close(fd): closed.append(fd) os_close(fd) with mock.patch('os.close', side_effect=close): with mock.patch('io.open', side_effect=ValueError): self.assertRaises(ValueError, tempfile.NamedTemporaryFile) self.assertEqual(len(closed), 1) # 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_properties(self): f = tempfile.SpooledTemporaryFile(max_size=10) f.write(b'x' * 10) self.assertFalse(f._rolled) self.assertEqual(f.mode, 'w+b') self.assertIsNone(f.name) with self.assertRaises(AttributeError): f.newlines with self.assertRaises(AttributeError): f.encoding f.write(b'x') self.assertTrue(f._rolled) self.assertEqual(f.mode, 'rb+') self.assertIsNotNone(f.name) with self.assertRaises(AttributeError): f.newlines with self.assertRaises(AttributeError): f.encoding 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") self.assertFalse(f._rolled) self.assertEqual(f.mode, 'w+') self.assertIsNone(f.name) self.assertIsNone(f.newlines) self.assertIsNone(f.encoding) 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") self.assertTrue(f._rolled) self.assertEqual(f.mode, 'w+') self.assertIsNotNone(f.name) self.assertEqual(f.newlines, os.linesep) self.assertIsNotNone(f.encoding) 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) self.assertEqual(f.mode, 'w+') self.assertIsNone(f.name) self.assertIsNone(f.newlines) self.assertIsNone(f.encoding) f.write("\u039B" * 20 + "\r\n") f.seek(0) self.assertEqual(f.read(), "\u039B\r\n" + ("\u039B" * 20) + "\r\n") self.assertTrue(f._rolled) self.assertEqual(f.mode, 'w+') self.assertIsNotNone(f.name) self.assertIsNotNone(f.newlines) self.assertEqual(f.encoding, 'utf-8') 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="") def test_no_leak_fd(self): # Issue #21058: don't leak file descriptor when io.open() fails closed = [] os_close = os.close def close(fd): closed.append(fd) os_close(fd) with mock.patch('os.close', side_effect=close): with mock.patch('io.open', side_effect=ValueError): self.assertRaises(ValueError, tempfile.TemporaryFile) self.assertEqual(len(closed), 1) # 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: d1 = self.do_create(tmp.name, pre, suf, recurse-1) d1.name = None 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(FileNotFoundError) as cm: tempfile.TemporaryDirectory(dir=nonexistent) self.assertEqual(cm.exception.errno, errno.ENOENT) 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(recurse=0) # 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) def test_del_on_shutdown(self): # A TemporaryDirectory may be cleaned up during shutdown with self.do_create() as dir: for mod in ('builtins', 'os', 'shutil', 'sys', 'tempfile', 'warnings'): code = """if True: import builtins import os import shutil import sys import tempfile import warnings tmp = tempfile.TemporaryDirectory(dir={dir!r}) sys.stdout.buffer.write(tmp.name.encode()) tmp2 = os.path.join(tmp.name, 'test_dir') os.mkdir(tmp2) with open(os.path.join(tmp2, "test.txt"), "w") as f: f.write("Hello world!") {mod}.tmp = tmp warnings.filterwarnings("always", category=ResourceWarning) """.format(dir=dir, mod=mod) rc, out, err = script_helper.assert_python_ok("-c", code) tmp_name = out.decode().strip() self.assertFalse(os.path.exists(tmp_name), "TemporaryDirectory %s exists after cleanup" % tmp_name) err = err.decode('utf-8', 'backslashreplace') self.assertNotIn("Exception ", err) self.assertIn("ResourceWarning: Implicitly cleaning up", err) def test_exit_on_shutdown(self): # Issue #22427 with self.do_create() as dir: code = """if True: import sys import tempfile import warnings def generator(): with tempfile.TemporaryDirectory(dir={dir!r}) as tmp: yield tmp g = generator() sys.stdout.buffer.write(next(g).encode()) warnings.filterwarnings("always", category=ResourceWarning) """.format(dir=dir) rc, out, err = script_helper.assert_python_ok("-c", code) tmp_name = out.decode().strip() self.assertFalse(os.path.exists(tmp_name), "TemporaryDirectory %s exists after cleanup" % tmp_name) err = err.decode('utf-8', 'backslashreplace') self.assertNotIn("Exception ", err) self.assertIn("ResourceWarning: Implicitly cleaning up", err) def test_warnings_on_cleanup(self): # ResourceWarning will be triggered by __del__ with self.do_create() as dir: d = self.do_create(dir=dir, recurse=3) name = d.name # Check for the resource warning with support.check_warnings(('Implicitly', ResourceWarning), quiet=False): warnings.filterwarnings("always", category=ResourceWarning) del d support.gc_collect() self.assertFalse(os.path.exists(name), "TemporaryDirectory %s exists after __del__" % 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)) if __name__ == "__main__": unittest.main()