| import builtins | |
| import codecs | |
| import gc | |
| import locale | |
| import operator | |
| import os | |
| import struct | |
| import subprocess | |
| import sys | |
| import sysconfig | |
| import test.support | |
| from test import support | |
| from test.support import os_helper | |
| from test.support.script_helper import assert_python_ok, assert_python_failure | |
| from test.support import threading_helper | |
| import textwrap | |
| import unittest | |
| import warnings | |
| # count the number of test runs, used to create unique | |
| # strings to intern in test_intern() | |
| INTERN_NUMRUNS = 0 | |
| class DisplayHookTest(unittest.TestCase): | |
| def test_original_displayhook(self): | |
| dh = sys.__displayhook__ | |
| with support.captured_stdout() as out: | |
| dh(42) | |
| self.assertEqual(out.getvalue(), "42\n") | |
| self.assertEqual(builtins._, 42) | |
| del builtins._ | |
| with support.captured_stdout() as out: | |
| dh(None) | |
| self.assertEqual(out.getvalue(), "") | |
| self.assertTrue(not hasattr(builtins, "_")) | |
| # sys.displayhook() requires arguments | |
| self.assertRaises(TypeError, dh) | |
| stdout = sys.stdout | |
| try: | |
| del sys.stdout | |
| self.assertRaises(RuntimeError, dh, 42) | |
| finally: | |
| sys.stdout = stdout | |
| def test_lost_displayhook(self): | |
| displayhook = sys.displayhook | |
| try: | |
| del sys.displayhook | |
| code = compile("42", "<string>", "single") | |
| self.assertRaises(RuntimeError, eval, code) | |
| finally: | |
| sys.displayhook = displayhook | |
| def test_custom_displayhook(self): | |
| def baddisplayhook(obj): | |
| raise ValueError | |
| with support.swap_attr(sys, 'displayhook', baddisplayhook): | |
| code = compile("42", "<string>", "single") | |
| self.assertRaises(ValueError, eval, code) | |
| class ExceptHookTest(unittest.TestCase): | |
| def test_original_excepthook(self): | |
| try: | |
| raise ValueError(42) | |
| except ValueError as exc: | |
| with support.captured_stderr() as err: | |
| sys.__excepthook__(*sys.exc_info()) | |
| self.assertTrue(err.getvalue().endswith("ValueError: 42\n")) | |
| self.assertRaises(TypeError, sys.__excepthook__) | |
| def test_excepthook_bytes_filename(self): | |
| # bpo-37467: sys.excepthook() must not crash if a filename | |
| # is a bytes string | |
| with warnings.catch_warnings(): | |
| warnings.simplefilter('ignore', BytesWarning) | |
| try: | |
| raise SyntaxError("msg", (b"bytes_filename", 123, 0, "text")) | |
| except SyntaxError as exc: | |
| with support.captured_stderr() as err: | |
| sys.__excepthook__(*sys.exc_info()) | |
| err = err.getvalue() | |
| self.assertIn(""" File "b'bytes_filename'", line 123\n""", err) | |
| self.assertIn(""" text\n""", err) | |
| self.assertTrue(err.endswith("SyntaxError: msg\n")) | |
| def test_excepthook(self): | |
| with test.support.captured_output("stderr") as stderr: | |
| sys.excepthook(1, '1', 1) | |
| self.assertTrue("TypeError: print_exception(): Exception expected for " \ | |
| "value, str found" in stderr.getvalue()) | |
| # FIXME: testing the code for a lost or replaced excepthook in | |
| # Python/pythonrun.c::PyErr_PrintEx() is tricky. | |
| class SysModuleTest(unittest.TestCase): | |
| def tearDown(self): | |
| test.support.reap_children() | |
| def test_exit(self): | |
| # call with two arguments | |
| self.assertRaises(TypeError, sys.exit, 42, 42) | |
| # call without argument | |
| with self.assertRaises(SystemExit) as cm: | |
| sys.exit() | |
| self.assertIsNone(cm.exception.code) | |
| rc, out, err = assert_python_ok('-c', 'import sys; sys.exit()') | |
| self.assertEqual(rc, 0) | |
| self.assertEqual(out, b'') | |
| self.assertEqual(err, b'') | |
| # call with integer argument | |
| with self.assertRaises(SystemExit) as cm: | |
| sys.exit(42) | |
| self.assertEqual(cm.exception.code, 42) | |
| # call with tuple argument with one entry | |
| # entry will be unpacked | |
| with self.assertRaises(SystemExit) as cm: | |
| sys.exit((42,)) | |
| self.assertEqual(cm.exception.code, 42) | |
| # call with string argument | |
| with self.assertRaises(SystemExit) as cm: | |
| sys.exit("exit") | |
| self.assertEqual(cm.exception.code, "exit") | |
| # call with tuple argument with two entries | |
| with self.assertRaises(SystemExit) as cm: | |
| sys.exit((17, 23)) | |
| self.assertEqual(cm.exception.code, (17, 23)) | |
| # test that the exit machinery handles SystemExits properly | |
| rc, out, err = assert_python_failure('-c', 'raise SystemExit(47)') | |
| self.assertEqual(rc, 47) | |
| self.assertEqual(out, b'') | |
| self.assertEqual(err, b'') | |
| def check_exit_message(code, expected, **env_vars): | |
| rc, out, err = assert_python_failure('-c', code, **env_vars) | |
| self.assertEqual(rc, 1) | |
| self.assertEqual(out, b'') | |
| self.assertTrue(err.startswith(expected), | |
| "%s doesn't start with %s" % (ascii(err), ascii(expected))) | |
| # test that stderr buffer is flushed before the exit message is written | |
| # into stderr | |
| check_exit_message( | |
| r'import sys; sys.stderr.write("unflushed,"); sys.exit("message")', | |
| b"unflushed,message") | |
| # test that the exit message is written with backslashreplace error | |
| # handler to stderr | |
| check_exit_message( | |
| r'import sys; sys.exit("surrogates:\uDCFF")', | |
| b"surrogates:\\udcff") | |
| # test that the unicode message is encoded to the stderr encoding | |
| # instead of the default encoding (utf8) | |
| check_exit_message( | |
| r'import sys; sys.exit("h\xe9")', | |
| b"h\xe9", PYTHONIOENCODING='latin-1') | |
| def test_getdefaultencoding(self): | |
| self.assertRaises(TypeError, sys.getdefaultencoding, 42) | |
| # can't check more than the type, as the user might have changed it | |
| self.assertIsInstance(sys.getdefaultencoding(), str) | |
| # testing sys.settrace() is done in test_sys_settrace.py | |
| # testing sys.setprofile() is done in test_sys_setprofile.py | |
| def test_switchinterval(self): | |
| self.assertRaises(TypeError, sys.setswitchinterval) | |
| self.assertRaises(TypeError, sys.setswitchinterval, "a") | |
| self.assertRaises(ValueError, sys.setswitchinterval, -1.0) | |
| self.assertRaises(ValueError, sys.setswitchinterval, 0.0) | |
| orig = sys.getswitchinterval() | |
| # sanity check | |
| self.assertTrue(orig < 0.5, orig) | |
| try: | |
| for n in 0.00001, 0.05, 3.0, orig: | |
| sys.setswitchinterval(n) | |
| self.assertAlmostEqual(sys.getswitchinterval(), n) | |
| finally: | |
| sys.setswitchinterval(orig) | |
| def test_recursionlimit(self): | |
| self.assertRaises(TypeError, sys.getrecursionlimit, 42) | |
| oldlimit = sys.getrecursionlimit() | |
| self.assertRaises(TypeError, sys.setrecursionlimit) | |
| self.assertRaises(ValueError, sys.setrecursionlimit, -42) | |
| sys.setrecursionlimit(10000) | |
| self.assertEqual(sys.getrecursionlimit(), 10000) | |
| sys.setrecursionlimit(oldlimit) | |
| def test_recursionlimit_recovery(self): | |
| if hasattr(sys, 'gettrace') and sys.gettrace(): | |
| self.skipTest('fatal error if run with a trace function') | |
| oldlimit = sys.getrecursionlimit() | |
| def f(): | |
| f() | |
| try: | |
| for depth in (50, 75, 100, 250, 1000): | |
| try: | |
| sys.setrecursionlimit(depth) | |
| except RecursionError: | |
| # Issue #25274: The recursion limit is too low at the | |
| # current recursion depth | |
| continue | |
| # Issue #5392: test stack overflow after hitting recursion | |
| # limit twice | |
| with self.assertRaises(RecursionError): | |
| f() | |
| with self.assertRaises(RecursionError): | |
| f() | |
| finally: | |
| sys.setrecursionlimit(oldlimit) | |
| @test.support.cpython_only | |
| def test_setrecursionlimit_recursion_depth(self): | |
| # Issue #25274: Setting a low recursion limit must be blocked if the | |
| # current recursion depth is already higher than limit. | |
| from _testinternalcapi import get_recursion_depth | |
| def set_recursion_limit_at_depth(depth, limit): | |
| recursion_depth = get_recursion_depth() | |
| if recursion_depth >= depth: | |
| with self.assertRaises(RecursionError) as cm: | |
| sys.setrecursionlimit(limit) | |
| self.assertRegex(str(cm.exception), | |
| "cannot set the recursion limit to [0-9]+ " | |
| "at the recursion depth [0-9]+: " | |
| "the limit is too low") | |
| else: | |
| set_recursion_limit_at_depth(depth, limit) | |
| oldlimit = sys.getrecursionlimit() | |
| try: | |
| sys.setrecursionlimit(1000) | |
| for limit in (10, 25, 50, 75, 100, 150, 200): | |
| set_recursion_limit_at_depth(limit, limit) | |
| finally: | |
| sys.setrecursionlimit(oldlimit) | |
| def test_getwindowsversion(self): | |
| # Raise SkipTest if sys doesn't have getwindowsversion attribute | |
| test.support.get_attribute(sys, "getwindowsversion") | |
| v = sys.getwindowsversion() | |
| self.assertEqual(len(v), 5) | |
| self.assertIsInstance(v[0], int) | |
| self.assertIsInstance(v[1], int) | |
| self.assertIsInstance(v[2], int) | |
| self.assertIsInstance(v[3], int) | |
| self.assertIsInstance(v[4], str) | |
| self.assertRaises(IndexError, operator.getitem, v, 5) | |
| self.assertIsInstance(v.major, int) | |
| self.assertIsInstance(v.minor, int) | |
| self.assertIsInstance(v.build, int) | |
| self.assertIsInstance(v.platform, int) | |
| self.assertIsInstance(v.service_pack, str) | |
| self.assertIsInstance(v.service_pack_minor, int) | |
| self.assertIsInstance(v.service_pack_major, int) | |
| self.assertIsInstance(v.suite_mask, int) | |
| self.assertIsInstance(v.product_type, int) | |
| self.assertEqual(v[0], v.major) | |
| self.assertEqual(v[1], v.minor) | |
| self.assertEqual(v[2], v.build) | |
| self.assertEqual(v[3], v.platform) | |
| self.assertEqual(v[4], v.service_pack) | |
| # This is how platform.py calls it. Make sure tuple | |
| # still has 5 elements | |
| maj, min, buildno, plat, csd = sys.getwindowsversion() | |
| def test_call_tracing(self): | |
| self.assertRaises(TypeError, sys.call_tracing, type, 2) | |
| @unittest.skipUnless(hasattr(sys, "setdlopenflags"), | |
| 'test needs sys.setdlopenflags()') | |
| def test_dlopenflags(self): | |
| self.assertTrue(hasattr(sys, "getdlopenflags")) | |
| self.assertRaises(TypeError, sys.getdlopenflags, 42) | |
| oldflags = sys.getdlopenflags() | |
| self.assertRaises(TypeError, sys.setdlopenflags) | |
| sys.setdlopenflags(oldflags+1) | |
| self.assertEqual(sys.getdlopenflags(), oldflags+1) | |
| sys.setdlopenflags(oldflags) | |
| @test.support.refcount_test | |
| def test_refcount(self): | |
| # n here must be a global in order for this test to pass while | |
| # tracing with a python function. Tracing calls PyFrame_FastToLocals | |
| # which will add a copy of any locals to the frame object, causing | |
| # the reference count to increase by 2 instead of 1. | |
| global n | |
| self.assertRaises(TypeError, sys.getrefcount) | |
| c = sys.getrefcount(None) | |
| n = None | |
| self.assertEqual(sys.getrefcount(None), c+1) | |
| del n | |
| self.assertEqual(sys.getrefcount(None), c) | |
| if hasattr(sys, "gettotalrefcount"): | |
| self.assertIsInstance(sys.gettotalrefcount(), int) | |
| def test_getframe(self): | |
| self.assertRaises(TypeError, sys._getframe, 42, 42) | |
| self.assertRaises(ValueError, sys._getframe, 2000000000) | |
| self.assertTrue( | |
| SysModuleTest.test_getframe.__code__ \ | |
| is sys._getframe().f_code | |
| ) | |
| # sys._current_frames() is a CPython-only gimmick. | |
| @threading_helper.reap_threads | |
| def test_current_frames(self): | |
| import threading | |
| import traceback | |
| # Spawn a thread that blocks at a known place. Then the main | |
| # thread does sys._current_frames(), and verifies that the frames | |
| # returned make sense. | |
| entered_g = threading.Event() | |
| leave_g = threading.Event() | |
| thread_info = [] # the thread's id | |
| def f123(): | |
| g456() | |
| def g456(): | |
| thread_info.append(threading.get_ident()) | |
| entered_g.set() | |
| leave_g.wait() | |
| t = threading.Thread(target=f123) | |
| t.start() | |
| entered_g.wait() | |
| # At this point, t has finished its entered_g.set(), although it's | |
| # impossible to guess whether it's still on that line or has moved on | |
| # to its leave_g.wait(). | |
| self.assertEqual(len(thread_info), 1) | |
| thread_id = thread_info[0] | |
| d = sys._current_frames() | |
| for tid in d: | |
| self.assertIsInstance(tid, int) | |
| self.assertGreater(tid, 0) | |
| main_id = threading.get_ident() | |
| self.assertIn(main_id, d) | |
| self.assertIn(thread_id, d) | |
| # Verify that the captured main-thread frame is _this_ frame. | |
| frame = d.pop(main_id) | |
| self.assertTrue(frame is sys._getframe()) | |
| # Verify that the captured thread frame is blocked in g456, called | |
| # from f123. This is a little tricky, since various bits of | |
| # threading.py are also in the thread's call stack. | |
| frame = d.pop(thread_id) | |
| stack = traceback.extract_stack(frame) | |
| for i, (filename, lineno, funcname, sourceline) in enumerate(stack): | |
| if funcname == "f123": | |
| break | |
| else: | |
| self.fail("didn't find f123() on thread's call stack") | |
| self.assertEqual(sourceline, "g456()") | |
| # And the next record must be for g456(). | |
| filename, lineno, funcname, sourceline = stack[i+1] | |
| self.assertEqual(funcname, "g456") | |
| self.assertIn(sourceline, ["leave_g.wait()", "entered_g.set()"]) | |
| # Reap the spawned thread. | |
| leave_g.set() | |
| t.join() | |
| @threading_helper.reap_threads | |
| def test_current_exceptions(self): | |
| import threading | |
| import traceback | |
| # Spawn a thread that blocks at a known place. Then the main | |
| # thread does sys._current_frames(), and verifies that the frames | |
| # returned make sense. | |
| entered_g = threading.Event() | |
| leave_g = threading.Event() | |
| thread_info = [] # the thread's id | |
| def f123(): | |
| g456() | |
| def g456(): | |
| thread_info.append(threading.get_ident()) | |
| entered_g.set() | |
| while True: | |
| try: | |
| raise ValueError("oops") | |
| except ValueError: | |
| if leave_g.wait(timeout=support.LONG_TIMEOUT): | |
| break | |
| t = threading.Thread(target=f123) | |
| t.start() | |
| entered_g.wait() | |
| # At this point, t has finished its entered_g.set(), although it's | |
| # impossible to guess whether it's still on that line or has moved on | |
| # to its leave_g.wait(). | |
| self.assertEqual(len(thread_info), 1) | |
| thread_id = thread_info[0] | |
| d = sys._current_exceptions() | |
| for tid in d: | |
| self.assertIsInstance(tid, int) | |
| self.assertGreater(tid, 0) | |
| main_id = threading.get_ident() | |
| self.assertIn(main_id, d) | |
| self.assertIn(thread_id, d) | |
| self.assertEqual((None, None, None), d.pop(main_id)) | |
| # Verify that the captured thread frame is blocked in g456, called | |
| # from f123. This is a little tricky, since various bits of | |
| # threading.py are also in the thread's call stack. | |
| exc_type, exc_value, exc_tb = d.pop(thread_id) | |
| stack = traceback.extract_stack(exc_tb.tb_frame) | |
| for i, (filename, lineno, funcname, sourceline) in enumerate(stack): | |
| if funcname == "f123": | |
| break | |
| else: | |
| self.fail("didn't find f123() on thread's call stack") | |
| self.assertEqual(sourceline, "g456()") | |
| # And the next record must be for g456(). | |
| filename, lineno, funcname, sourceline = stack[i+1] | |
| self.assertEqual(funcname, "g456") | |
| self.assertTrue(sourceline.startswith("if leave_g.wait(")) | |
| # Reap the spawned thread. | |
| leave_g.set() | |
| t.join() | |
| def test_attributes(self): | |
| self.assertIsInstance(sys.api_version, int) | |
| self.assertIsInstance(sys.argv, list) | |
| for arg in sys.argv: | |
| self.assertIsInstance(arg, str) | |
| self.assertIsInstance(sys.orig_argv, list) | |
| for arg in sys.orig_argv: | |
| self.assertIsInstance(arg, str) | |
| self.assertIn(sys.byteorder, ("little", "big")) | |
| self.assertIsInstance(sys.builtin_module_names, tuple) | |
| self.assertIsInstance(sys.copyright, str) | |
| self.assertIsInstance(sys.exec_prefix, str) | |
| self.assertIsInstance(sys.base_exec_prefix, str) | |
| self.assertIsInstance(sys.executable, str) | |
| self.assertEqual(len(sys.float_info), 11) | |
| self.assertEqual(sys.float_info.radix, 2) | |
| self.assertEqual(len(sys.int_info), 2) | |
| self.assertTrue(sys.int_info.bits_per_digit % 5 == 0) | |
| self.assertTrue(sys.int_info.sizeof_digit >= 1) | |
| self.assertEqual(type(sys.int_info.bits_per_digit), int) | |
| self.assertEqual(type(sys.int_info.sizeof_digit), int) | |
| self.assertIsInstance(sys.hexversion, int) | |
| self.assertEqual(len(sys.hash_info), 9) | |
| self.assertLess(sys.hash_info.modulus, 2**sys.hash_info.width) | |
| # sys.hash_info.modulus should be a prime; we do a quick | |
| # probable primality test (doesn't exclude the possibility of | |
| # a Carmichael number) | |
| for x in range(1, 100): | |
| self.assertEqual( | |
| pow(x, sys.hash_info.modulus-1, sys.hash_info.modulus), | |
| 1, | |
| "sys.hash_info.modulus {} is a non-prime".format( | |
| sys.hash_info.modulus) | |
| ) | |
| self.assertIsInstance(sys.hash_info.inf, int) | |
| self.assertIsInstance(sys.hash_info.nan, int) | |
| self.assertIsInstance(sys.hash_info.imag, int) | |
| algo = sysconfig.get_config_var("Py_HASH_ALGORITHM") | |
| if sys.hash_info.algorithm in {"fnv", "siphash24"}: | |
| self.assertIn(sys.hash_info.hash_bits, {32, 64}) | |
| self.assertIn(sys.hash_info.seed_bits, {32, 64, 128}) | |
| if algo == 1: | |
| self.assertEqual(sys.hash_info.algorithm, "siphash24") | |
| elif algo == 2: | |
| self.assertEqual(sys.hash_info.algorithm, "fnv") | |
| else: | |
| self.assertIn(sys.hash_info.algorithm, {"fnv", "siphash24"}) | |
| else: | |
| # PY_HASH_EXTERNAL | |
| self.assertEqual(algo, 0) | |
| self.assertGreaterEqual(sys.hash_info.cutoff, 0) | |
| self.assertLess(sys.hash_info.cutoff, 8) | |
| self.assertIsInstance(sys.maxsize, int) | |
| self.assertIsInstance(sys.maxunicode, int) | |
| self.assertEqual(sys.maxunicode, 0x10FFFF) | |
| self.assertIsInstance(sys.platform, str) | |
| self.assertIsInstance(sys.prefix, str) | |
| self.assertIsInstance(sys.base_prefix, str) | |
| self.assertIsInstance(sys.platlibdir, str) | |
| self.assertIsInstance(sys.version, str) | |
| vi = sys.version_info | |
| self.assertIsInstance(vi[:], tuple) | |
| self.assertEqual(len(vi), 5) | |
| self.assertIsInstance(vi[0], int) | |
| self.assertIsInstance(vi[1], int) | |
| self.assertIsInstance(vi[2], int) | |
| self.assertIn(vi[3], ("alpha", "beta", "candidate", "final")) | |
| self.assertIsInstance(vi[4], int) | |
| self.assertIsInstance(vi.major, int) | |
| self.assertIsInstance(vi.minor, int) | |
| self.assertIsInstance(vi.micro, int) | |
| self.assertIn(vi.releaselevel, ("alpha", "beta", "candidate", "final")) | |
| self.assertIsInstance(vi.serial, int) | |
| self.assertEqual(vi[0], vi.major) | |
| self.assertEqual(vi[1], vi.minor) | |
| self.assertEqual(vi[2], vi.micro) | |
| self.assertEqual(vi[3], vi.releaselevel) | |
| self.assertEqual(vi[4], vi.serial) | |
| self.assertTrue(vi > (1,0,0)) | |
| self.assertIsInstance(sys.float_repr_style, str) | |
| self.assertIn(sys.float_repr_style, ('short', 'legacy')) | |
| if not sys.platform.startswith('win'): | |
| self.assertIsInstance(sys.abiflags, str) | |
| def test_thread_info(self): | |
| info = sys.thread_info | |
| self.assertEqual(len(info), 3) | |
| self.assertIn(info.name, ('nt', 'pthread', 'solaris', None)) | |
| self.assertIn(info.lock, ('semaphore', 'mutex+cond', None)) | |
| def test_43581(self): | |
| # Can't use sys.stdout, as this is a StringIO object when | |
| # the test runs under regrtest. | |
| self.assertEqual(sys.__stdout__.encoding, sys.__stderr__.encoding) | |
| def test_intern(self): | |
| global INTERN_NUMRUNS | |
| INTERN_NUMRUNS += 1 | |
| self.assertRaises(TypeError, sys.intern) | |
| s = "never interned before" + str(INTERN_NUMRUNS) | |
| self.assertTrue(sys.intern(s) is s) | |
| s2 = s.swapcase().swapcase() | |
| self.assertTrue(sys.intern(s2) is s) | |
| # Subclasses of string can't be interned, because they | |
| # provide too much opportunity for insane things to happen. | |
| # We don't want them in the interned dict and if they aren't | |
| # actually interned, we don't want to create the appearance | |
| # that they are by allowing intern() to succeed. | |
| class S(str): | |
| def __hash__(self): | |
| return 123 | |
| self.assertRaises(TypeError, sys.intern, S("abc")) | |
| def test_sys_flags(self): | |
| self.assertTrue(sys.flags) | |
| attrs = ("debug", | |
| "inspect", "interactive", "optimize", | |
| "dont_write_bytecode", "no_user_site", "no_site", | |
| "ignore_environment", "verbose", "bytes_warning", "quiet", | |
| "hash_randomization", "isolated", "dev_mode", "utf8_mode", | |
| "warn_default_encoding") | |
| for attr in attrs: | |
| self.assertTrue(hasattr(sys.flags, attr), attr) | |
| attr_type = bool if attr == "dev_mode" else int | |
| self.assertEqual(type(getattr(sys.flags, attr)), attr_type, attr) | |
| self.assertTrue(repr(sys.flags)) | |
| self.assertEqual(len(sys.flags), len(attrs)) | |
| self.assertIn(sys.flags.utf8_mode, {0, 1, 2}) | |
| def assert_raise_on_new_sys_type(self, sys_attr): | |
| # Users are intentionally prevented from creating new instances of | |
| # sys.flags, sys.version_info, and sys.getwindowsversion. | |
| arg = sys_attr | |
| attr_type = type(sys_attr) | |
| with self.assertRaises(TypeError): | |
| attr_type(arg) | |
| with self.assertRaises(TypeError): | |
| attr_type.__new__(attr_type, arg) | |
| def test_sys_flags_no_instantiation(self): | |
| self.assert_raise_on_new_sys_type(sys.flags) | |
| def test_sys_version_info_no_instantiation(self): | |
| self.assert_raise_on_new_sys_type(sys.version_info) | |
| def test_sys_getwindowsversion_no_instantiation(self): | |
| # Skip if not being run on Windows. | |
| test.support.get_attribute(sys, "getwindowsversion") | |
| self.assert_raise_on_new_sys_type(sys.getwindowsversion()) | |
| @test.support.cpython_only | |
| def test_clear_type_cache(self): | |
| sys._clear_type_cache() | |
| def test_ioencoding(self): | |
| env = dict(os.environ) | |
| # Test character: cent sign, encoded as 0x4A (ASCII J) in CP424, | |
| # not representable in ASCII. | |
| env["PYTHONIOENCODING"] = "cp424" | |
| p = subprocess.Popen([sys.executable, "-c", 'print(chr(0xa2))'], | |
| stdout = subprocess.PIPE, env=env) | |
| out = p.communicate()[0].strip() | |
| expected = ("\xa2" + os.linesep).encode("cp424") | |
| self.assertEqual(out, expected) | |
| env["PYTHONIOENCODING"] = "ascii:replace" | |
| p = subprocess.Popen([sys.executable, "-c", 'print(chr(0xa2))'], | |
| stdout = subprocess.PIPE, env=env) | |
| out = p.communicate()[0].strip() | |
| self.assertEqual(out, b'?') | |
| env["PYTHONIOENCODING"] = "ascii" | |
| p = subprocess.Popen([sys.executable, "-c", 'print(chr(0xa2))'], | |
| stdout=subprocess.PIPE, stderr=subprocess.PIPE, | |
| env=env) | |
| out, err = p.communicate() | |
| self.assertEqual(out, b'') | |
| self.assertIn(b'UnicodeEncodeError:', err) | |
| self.assertIn(rb"'\xa2'", err) | |
| env["PYTHONIOENCODING"] = "ascii:" | |
| p = subprocess.Popen([sys.executable, "-c", 'print(chr(0xa2))'], | |
| stdout=subprocess.PIPE, stderr=subprocess.PIPE, | |
| env=env) | |
| out, err = p.communicate() | |
| self.assertEqual(out, b'') | |
| self.assertIn(b'UnicodeEncodeError:', err) | |
| self.assertIn(rb"'\xa2'", err) | |
| env["PYTHONIOENCODING"] = ":surrogateescape" | |
| p = subprocess.Popen([sys.executable, "-c", 'print(chr(0xdcbd))'], | |
| stdout=subprocess.PIPE, env=env) | |
| out = p.communicate()[0].strip() | |
| self.assertEqual(out, b'\xbd') | |
| @unittest.skipUnless(os_helper.FS_NONASCII, | |
| 'requires OS support of non-ASCII encodings') | |
| @unittest.skipUnless(sys.getfilesystemencoding() == locale.getpreferredencoding(False), | |
| 'requires FS encoding to match locale') | |
| def test_ioencoding_nonascii(self): | |
| env = dict(os.environ) | |
| env["PYTHONIOENCODING"] = "" | |
| p = subprocess.Popen([sys.executable, "-c", | |
| 'print(%a)' % os_helper.FS_NONASCII], | |
| stdout=subprocess.PIPE, env=env) | |
| out = p.communicate()[0].strip() | |
| self.assertEqual(out, os.fsencode(os_helper.FS_NONASCII)) | |
| @unittest.skipIf(sys.base_prefix != sys.prefix, | |
| 'Test is not venv-compatible') | |
| def test_executable(self): | |
| # sys.executable should be absolute | |
| self.assertEqual(os.path.abspath(sys.executable), sys.executable) | |
| # Issue #7774: Ensure that sys.executable is an empty string if argv[0] | |
| # has been set to a non existent program name and Python is unable to | |
| # retrieve the real program name | |
| # For a normal installation, it should work without 'cwd' | |
| # argument. For test runs in the build directory, see #7774. | |
| python_dir = os.path.dirname(os.path.realpath(sys.executable)) | |
| p = subprocess.Popen( | |
| ["nonexistent", "-c", | |
| 'import sys; print(sys.executable.encode("ascii", "backslashreplace"))'], | |
| executable=sys.executable, stdout=subprocess.PIPE, cwd=python_dir) | |
| stdout = p.communicate()[0] | |
| executable = stdout.strip().decode("ASCII") | |
| p.wait() | |
| self.assertIn(executable, ["b''", repr(sys.executable.encode("ascii", "backslashreplace"))]) | |
| def check_fsencoding(self, fs_encoding, expected=None): | |
| self.assertIsNotNone(fs_encoding) | |
| codecs.lookup(fs_encoding) | |
| if expected: | |
| self.assertEqual(fs_encoding, expected) | |
| def test_getfilesystemencoding(self): | |
| fs_encoding = sys.getfilesystemencoding() | |
| if sys.platform == 'darwin': | |
| expected = 'utf-8' | |
| else: | |
| expected = None | |
| self.check_fsencoding(fs_encoding, expected) | |
| def c_locale_get_error_handler(self, locale, isolated=False, encoding=None): | |
| # Force the POSIX locale | |
| env = os.environ.copy() | |
| env["LC_ALL"] = locale | |
| env["PYTHONCOERCECLOCALE"] = "0" | |
| code = '\n'.join(( | |
| 'import sys', | |
| 'def dump(name):', | |
| ' std = getattr(sys, name)', | |
| ' print("%s: %s" % (name, std.errors))', | |
| 'dump("stdin")', | |
| 'dump("stdout")', | |
| 'dump("stderr")', | |
| )) | |
| args = [sys.executable, "-X", "utf8=0", "-c", code] | |
| if isolated: | |
| args.append("-I") | |
| if encoding is not None: | |
| env['PYTHONIOENCODING'] = encoding | |
| else: | |
| env.pop('PYTHONIOENCODING', None) | |
| p = subprocess.Popen(args, | |
| stdout=subprocess.PIPE, | |
| stderr=subprocess.STDOUT, | |
| env=env, | |
| universal_newlines=True) | |
| stdout, stderr = p.communicate() | |
| return stdout | |
| def check_locale_surrogateescape(self, locale): | |
| out = self.c_locale_get_error_handler(locale, isolated=True) | |
| self.assertEqual(out, | |
| 'stdin: surrogateescape\n' | |
| 'stdout: surrogateescape\n' | |
| 'stderr: backslashreplace\n') | |
| # replace the default error handler | |
| out = self.c_locale_get_error_handler(locale, encoding=':ignore') | |
| self.assertEqual(out, | |
| 'stdin: ignore\n' | |
| 'stdout: ignore\n' | |
| 'stderr: backslashreplace\n') | |
| # force the encoding | |
| out = self.c_locale_get_error_handler(locale, encoding='iso8859-1') | |
| self.assertEqual(out, | |
| 'stdin: strict\n' | |
| 'stdout: strict\n' | |
| 'stderr: backslashreplace\n') | |
| out = self.c_locale_get_error_handler(locale, encoding='iso8859-1:') | |
| self.assertEqual(out, | |
| 'stdin: strict\n' | |
| 'stdout: strict\n' | |
| 'stderr: backslashreplace\n') | |
| # have no any effect | |
| out = self.c_locale_get_error_handler(locale, encoding=':') | |
| self.assertEqual(out, | |
| 'stdin: surrogateescape\n' | |
| 'stdout: surrogateescape\n' | |
| 'stderr: backslashreplace\n') | |
| out = self.c_locale_get_error_handler(locale, encoding='') | |
| self.assertEqual(out, | |
| 'stdin: surrogateescape\n' | |
| 'stdout: surrogateescape\n' | |
| 'stderr: backslashreplace\n') | |
| def test_c_locale_surrogateescape(self): | |
| self.check_locale_surrogateescape('C') | |
| def test_posix_locale_surrogateescape(self): | |
| self.check_locale_surrogateescape('POSIX') | |
| def test_implementation(self): | |
| # This test applies to all implementations equally. | |
| levels = {'alpha': 0xA, 'beta': 0xB, 'candidate': 0xC, 'final': 0xF} | |
| self.assertTrue(hasattr(sys.implementation, 'name')) | |
| self.assertTrue(hasattr(sys.implementation, 'version')) | |
| self.assertTrue(hasattr(sys.implementation, 'hexversion')) | |
| self.assertTrue(hasattr(sys.implementation, 'cache_tag')) | |
| version = sys.implementation.version | |
| self.assertEqual(version[:2], (version.major, version.minor)) | |
| hexversion = (version.major << 24 | version.minor << 16 | | |
| version.micro << 8 | levels[version.releaselevel] << 4 | | |
| version.serial << 0) | |
| self.assertEqual(sys.implementation.hexversion, hexversion) | |
| # PEP 421 requires that .name be lower case. | |
| self.assertEqual(sys.implementation.name, | |
| sys.implementation.name.lower()) | |
| @test.support.cpython_only | |
| def test_debugmallocstats(self): | |
| # Test sys._debugmallocstats() | |
| from test.support.script_helper import assert_python_ok | |
| args = ['-c', 'import sys; sys._debugmallocstats()'] | |
| ret, out, err = assert_python_ok(*args) | |
| self.assertIn(b"free PyDictObjects", err) | |
| # The function has no parameter | |
| self.assertRaises(TypeError, sys._debugmallocstats, True) | |
| @unittest.skipUnless(hasattr(sys, "getallocatedblocks"), | |
| "sys.getallocatedblocks unavailable on this build") | |
| def test_getallocatedblocks(self): | |
| try: | |
| import _testcapi | |
| except ImportError: | |
| with_pymalloc = support.with_pymalloc() | |
| else: | |
| try: | |
| alloc_name = _testcapi.pymem_getallocatorsname() | |
| except RuntimeError as exc: | |
| # "cannot get allocators name" (ex: tracemalloc is used) | |
| with_pymalloc = True | |
| else: | |
| with_pymalloc = (alloc_name in ('pymalloc', 'pymalloc_debug')) | |
| # Some sanity checks | |
| a = sys.getallocatedblocks() | |
| self.assertIs(type(a), int) | |
| if with_pymalloc: | |
| self.assertGreater(a, 0) | |
| else: | |
| # When WITH_PYMALLOC isn't available, we don't know anything | |
| # about the underlying implementation: the function might | |
| # return 0 or something greater. | |
| self.assertGreaterEqual(a, 0) | |
| try: | |
| # While we could imagine a Python session where the number of | |
| # multiple buffer objects would exceed the sharing of references, | |
| # it is unlikely to happen in a normal test run. | |
| self.assertLess(a, sys.gettotalrefcount()) | |
| except AttributeError: | |
| # gettotalrefcount() not available | |
| pass | |
| gc.collect() | |
| b = sys.getallocatedblocks() | |
| self.assertLessEqual(b, a) | |
| gc.collect() | |
| c = sys.getallocatedblocks() | |
| self.assertIn(c, range(b - 50, b + 50)) | |
| def test_is_finalizing(self): | |
| self.assertIs(sys.is_finalizing(), False) | |
| # Don't use the atexit module because _Py_Finalizing is only set | |
| # after calling atexit callbacks | |
| code = """if 1: | |
| import sys | |
| class AtExit: | |
| is_finalizing = sys.is_finalizing | |
| print = print | |
| def __del__(self): | |
| self.print(self.is_finalizing(), flush=True) | |
| # Keep a reference in the __main__ module namespace, so the | |
| # AtExit destructor will be called at Python exit | |
| ref = AtExit() | |
| """ | |
| rc, stdout, stderr = assert_python_ok('-c', code) | |
| self.assertEqual(stdout.rstrip(), b'True') | |
| def test_issue20602(self): | |
| # sys.flags and sys.float_info were wiped during shutdown. | |
| code = """if 1: | |
| import sys | |
| class A: | |
| def __del__(self, sys=sys): | |
| print(sys.flags) | |
| print(sys.float_info) | |
| a = A() | |
| """ | |
| rc, out, err = assert_python_ok('-c', code) | |
| out = out.splitlines() | |
| self.assertIn(b'sys.flags', out[0]) | |
| self.assertIn(b'sys.float_info', out[1]) | |
| def test_sys_ignores_cleaning_up_user_data(self): | |
| code = """if 1: | |
| import struct, sys | |
| class C: | |
| def __init__(self): | |
| self.pack = struct.pack | |
| def __del__(self): | |
| self.pack('I', -42) | |
| sys.x = C() | |
| """ | |
| rc, stdout, stderr = assert_python_ok('-c', code) | |
| self.assertEqual(rc, 0) | |
| self.assertEqual(stdout.rstrip(), b"") | |
| self.assertEqual(stderr.rstrip(), b"") | |
| @unittest.skipUnless(hasattr(sys, 'getandroidapilevel'), | |
| 'need sys.getandroidapilevel()') | |
| def test_getandroidapilevel(self): | |
| level = sys.getandroidapilevel() | |
| self.assertIsInstance(level, int) | |
| self.assertGreater(level, 0) | |
| def test_sys_tracebacklimit(self): | |
| code = """if 1: | |
| import sys | |
| def f1(): | |
| 1 / 0 | |
| def f2(): | |
| f1() | |
| sys.tracebacklimit = %r | |
| f2() | |
| """ | |
| def check(tracebacklimit, expected): | |
| p = subprocess.Popen([sys.executable, '-c', code % tracebacklimit], | |
| stderr=subprocess.PIPE) | |
| out = p.communicate()[1] | |
| self.assertEqual(out.splitlines(), expected) | |
| traceback = [ | |
| b'Traceback (most recent call last):', | |
| b' File "<string>", line 8, in <module>', | |
| b' File "<string>", line 6, in f2', | |
| b' File "<string>", line 4, in f1', | |
| b'ZeroDivisionError: division by zero' | |
| ] | |
| check(10, traceback) | |
| check(3, traceback) | |
| check(2, traceback[:1] + traceback[2:]) | |
| check(1, traceback[:1] + traceback[3:]) | |
| check(0, [traceback[-1]]) | |
| check(-1, [traceback[-1]]) | |
| check(1<<1000, traceback) | |
| check(-1<<1000, [traceback[-1]]) | |
| check(None, traceback) | |
| def test_no_duplicates_in_meta_path(self): | |
| self.assertEqual(len(sys.meta_path), len(set(sys.meta_path))) | |
| @unittest.skipUnless(hasattr(sys, "_enablelegacywindowsfsencoding"), | |
| 'needs sys._enablelegacywindowsfsencoding()') | |
| def test__enablelegacywindowsfsencoding(self): | |
| code = ('import sys', | |
| 'sys._enablelegacywindowsfsencoding()', | |
| 'print(sys.getfilesystemencoding(), sys.getfilesystemencodeerrors())') | |
| rc, out, err = assert_python_ok('-c', '; '.join(code)) | |
| out = out.decode('ascii', 'replace').rstrip() | |
| self.assertEqual(out, 'mbcs replace') | |
| def test_orig_argv(self): | |
| code = textwrap.dedent(''' | |
| import sys | |
| print(sys.argv) | |
| print(sys.orig_argv) | |
| ''') | |
| args = [sys.executable, '-I', '-X', 'utf8', '-c', code, 'arg'] | |
| proc = subprocess.run(args, check=True, capture_output=True, text=True) | |
| expected = [ | |
| repr(['-c', 'arg']), # sys.argv | |
| repr(args), # sys.orig_argv | |
| ] | |
| self.assertEqual(proc.stdout.rstrip().splitlines(), expected, | |
| proc) | |
| def test_module_names(self): | |
| self.assertIsInstance(sys.stdlib_module_names, frozenset) | |
| for name in sys.stdlib_module_names: | |
| self.assertIsInstance(name, str) | |
| @test.support.cpython_only | |
| class UnraisableHookTest(unittest.TestCase): | |
| def write_unraisable_exc(self, exc, err_msg, obj): | |
| import _testcapi | |
| import types | |
| err_msg2 = f"Exception ignored {err_msg}" | |
| try: | |
| _testcapi.write_unraisable_exc(exc, err_msg, obj) | |
| return types.SimpleNamespace(exc_type=type(exc), | |
| exc_value=exc, | |
| exc_traceback=exc.__traceback__, | |
| err_msg=err_msg2, | |
| object=obj) | |
| finally: | |
| # Explicitly break any reference cycle | |
| exc = None | |
| def test_original_unraisablehook(self): | |
| for err_msg in (None, "original hook"): | |
| with self.subTest(err_msg=err_msg): | |
| obj = "an object" | |
| with test.support.captured_output("stderr") as stderr: | |
| with test.support.swap_attr(sys, 'unraisablehook', | |
| sys.__unraisablehook__): | |
| self.write_unraisable_exc(ValueError(42), err_msg, obj) | |
| err = stderr.getvalue() | |
| if err_msg is not None: | |
| self.assertIn(f'Exception ignored {err_msg}: {obj!r}\n', err) | |
| else: | |
| self.assertIn(f'Exception ignored in: {obj!r}\n', err) | |
| self.assertIn('Traceback (most recent call last):\n', err) | |
| self.assertIn('ValueError: 42\n', err) | |
| def test_original_unraisablehook_err(self): | |
| # bpo-22836: PyErr_WriteUnraisable() should give sensible reports | |
| class BrokenDel: | |
| def __del__(self): | |
| exc = ValueError("del is broken") | |
| # The following line is included in the traceback report: | |
| raise exc | |
| class BrokenStrException(Exception): | |
| def __str__(self): | |
| raise Exception("str() is broken") | |
| class BrokenExceptionDel: | |
| def __del__(self): | |
| exc = BrokenStrException() | |
| # The following line is included in the traceback report: | |
| raise exc | |
| for test_class in (BrokenDel, BrokenExceptionDel): | |
| with self.subTest(test_class): | |
| obj = test_class() | |
| with test.support.captured_stderr() as stderr, \ | |
| test.support.swap_attr(sys, 'unraisablehook', | |
| sys.__unraisablehook__): | |
| # Trigger obj.__del__() | |
| del obj | |
| report = stderr.getvalue() | |
| self.assertIn("Exception ignored", report) | |
| self.assertIn(test_class.__del__.__qualname__, report) | |
| self.assertIn("test_sys.py", report) | |
| self.assertIn("raise exc", report) | |
| if test_class is BrokenExceptionDel: | |
| self.assertIn("BrokenStrException", report) | |
| self.assertIn("<exception str() failed>", report) | |
| else: | |
| self.assertIn("ValueError", report) | |
| self.assertIn("del is broken", report) | |
| self.assertTrue(report.endswith("\n")) | |
| def test_original_unraisablehook_exception_qualname(self): | |
| class A: | |
| class B: | |
| class X(Exception): | |
| pass | |
| with test.support.captured_stderr() as stderr, \ | |
| test.support.swap_attr(sys, 'unraisablehook', | |
| sys.__unraisablehook__): | |
| expected = self.write_unraisable_exc( | |
| A.B.X(), "msg", "obj"); | |
| report = stderr.getvalue() | |
| testName = 'test_original_unraisablehook_exception_qualname' | |
| self.assertIn(f"{testName}.<locals>.A.B.X", report) | |
| def test_original_unraisablehook_wrong_type(self): | |
| exc = ValueError(42) | |
| with test.support.swap_attr(sys, 'unraisablehook', | |
| sys.__unraisablehook__): | |
| with self.assertRaises(TypeError): | |
| sys.unraisablehook(exc) | |
| def test_custom_unraisablehook(self): | |
| hook_args = None | |
| def hook_func(args): | |
| nonlocal hook_args | |
| hook_args = args | |
| obj = object() | |
| try: | |
| with test.support.swap_attr(sys, 'unraisablehook', hook_func): | |
| expected = self.write_unraisable_exc(ValueError(42), | |
| "custom hook", obj) | |
| for attr in "exc_type exc_value exc_traceback err_msg object".split(): | |
| self.assertEqual(getattr(hook_args, attr), | |
| getattr(expected, attr), | |
| (hook_args, expected)) | |
| finally: | |
| # expected and hook_args contain an exception: break reference cycle | |
| expected = None | |
| hook_args = None | |
| def test_custom_unraisablehook_fail(self): | |
| def hook_func(*args): | |
| raise Exception("hook_func failed") | |
| with test.support.captured_output("stderr") as stderr: | |
| with test.support.swap_attr(sys, 'unraisablehook', hook_func): | |
| self.write_unraisable_exc(ValueError(42), | |
| "custom hook fail", None) | |
| err = stderr.getvalue() | |
| self.assertIn(f'Exception ignored in sys.unraisablehook: ' | |
| f'{hook_func!r}\n', | |
| err) | |
| self.assertIn('Traceback (most recent call last):\n', err) | |
| self.assertIn('Exception: hook_func failed\n', err) | |
| @test.support.cpython_only | |
| class SizeofTest(unittest.TestCase): | |
| def setUp(self): | |
| self.P = struct.calcsize('P') | |
| self.longdigit = sys.int_info.sizeof_digit | |
| import _testinternalcapi | |
| self.gc_headsize = _testinternalcapi.SIZEOF_PYGC_HEAD | |
| check_sizeof = test.support.check_sizeof | |
| def test_gc_head_size(self): | |
| # Check that the gc header size is added to objects tracked by the gc. | |
| vsize = test.support.calcvobjsize | |
| gc_header_size = self.gc_headsize | |
| # bool objects are not gc tracked | |
| self.assertEqual(sys.getsizeof(True), vsize('') + self.longdigit) | |
| # but lists are | |
| self.assertEqual(sys.getsizeof([]), vsize('Pn') + gc_header_size) | |
| def test_errors(self): | |
| class BadSizeof: | |
| def __sizeof__(self): | |
| raise ValueError | |
| self.assertRaises(ValueError, sys.getsizeof, BadSizeof()) | |
| class InvalidSizeof: | |
| def __sizeof__(self): | |
| return None | |
| self.assertRaises(TypeError, sys.getsizeof, InvalidSizeof()) | |
| sentinel = ["sentinel"] | |
| self.assertIs(sys.getsizeof(InvalidSizeof(), sentinel), sentinel) | |
| class FloatSizeof: | |
| def __sizeof__(self): | |
| return 4.5 | |
| self.assertRaises(TypeError, sys.getsizeof, FloatSizeof()) | |
| self.assertIs(sys.getsizeof(FloatSizeof(), sentinel), sentinel) | |
| class OverflowSizeof(int): | |
| def __sizeof__(self): | |
| return int(self) | |
| self.assertEqual(sys.getsizeof(OverflowSizeof(sys.maxsize)), | |
| sys.maxsize + self.gc_headsize) | |
| with self.assertRaises(OverflowError): | |
| sys.getsizeof(OverflowSizeof(sys.maxsize + 1)) | |
| with self.assertRaises(ValueError): | |
| sys.getsizeof(OverflowSizeof(-1)) | |
| with self.assertRaises((ValueError, OverflowError)): | |
| sys.getsizeof(OverflowSizeof(-sys.maxsize - 1)) | |
| def test_default(self): | |
| size = test.support.calcvobjsize | |
| self.assertEqual(sys.getsizeof(True), size('') + self.longdigit) | |
| self.assertEqual(sys.getsizeof(True, -1), size('') + self.longdigit) | |
| def test_objecttypes(self): | |
| # check all types defined in Objects/ | |
| calcsize = struct.calcsize | |
| size = test.support.calcobjsize | |
| vsize = test.support.calcvobjsize | |
| check = self.check_sizeof | |
| # bool | |
| check(True, vsize('') + self.longdigit) | |
| # buffer | |
| # XXX | |
| # builtin_function_or_method | |
| check(len, size('5P')) | |
| # bytearray | |
| samples = [b'', b'u'*100000] | |
| for sample in samples: | |
| x = bytearray(sample) | |
| check(x, vsize('n2Pi') + x.__alloc__()) | |
| # bytearray_iterator | |
| check(iter(bytearray()), size('nP')) | |
| # bytes | |
| check(b'', vsize('n') + 1) | |
| check(b'x' * 10, vsize('n') + 11) | |
| # cell | |
| def get_cell(): | |
| x = 42 | |
| def inner(): | |
| return x | |
| return inner | |
| check(get_cell().__closure__[0], size('P')) | |
| # code | |
| def check_code_size(a, expected_size): | |
| self.assertGreaterEqual(sys.getsizeof(a), expected_size) | |
| check_code_size(get_cell().__code__, size('6i13P')) | |
| check_code_size(get_cell.__code__, size('6i13P')) | |
| def get_cell2(x): | |
| def inner(): | |
| return x | |
| return inner | |
| check_code_size(get_cell2.__code__, size('6i13P') + calcsize('n')) | |
| # complex | |
| check(complex(0,1), size('2d')) | |
| # method_descriptor (descriptor object) | |
| check(str.lower, size('3PPP')) | |
| # classmethod_descriptor (descriptor object) | |
| # XXX | |
| # member_descriptor (descriptor object) | |
| import datetime | |
| check(datetime.timedelta.days, size('3PP')) | |
| # getset_descriptor (descriptor object) | |
| import collections | |
| check(collections.defaultdict.default_factory, size('3PP')) | |
| # wrapper_descriptor (descriptor object) | |
| check(int.__add__, size('3P2P')) | |
| # method-wrapper (descriptor object) | |
| check({}.__iter__, size('2P')) | |
| # empty dict | |
| check({}, size('nQ2P')) | |
| # dict | |
| check({"a": 1}, size('nQ2P') + calcsize('2nP2n') + 8 + (8*2//3)*calcsize('n2P')) | |
| longdict = {1:1, 2:2, 3:3, 4:4, 5:5, 6:6, 7:7, 8:8} | |
| check(longdict, size('nQ2P') + calcsize('2nP2n') + 16 + (16*2//3)*calcsize('n2P')) | |
| # dictionary-keyview | |
| check({}.keys(), size('P')) | |
| # dictionary-valueview | |
| check({}.values(), size('P')) | |
| # dictionary-itemview | |
| check({}.items(), size('P')) | |
| # dictionary iterator | |
| check(iter({}), size('P2nPn')) | |
| # dictionary-keyiterator | |
| check(iter({}.keys()), size('P2nPn')) | |
| # dictionary-valueiterator | |
| check(iter({}.values()), size('P2nPn')) | |
| # dictionary-itemiterator | |
| check(iter({}.items()), size('P2nPn')) | |
| # dictproxy | |
| class C(object): pass | |
| check(C.__dict__, size('P')) | |
| # BaseException | |
| check(BaseException(), size('5Pb')) | |
| # UnicodeEncodeError | |
| check(UnicodeEncodeError("", "", 0, 0, ""), size('5Pb 2P2nP')) | |
| # UnicodeDecodeError | |
| check(UnicodeDecodeError("", b"", 0, 0, ""), size('5Pb 2P2nP')) | |
| # UnicodeTranslateError | |
| check(UnicodeTranslateError("", 0, 1, ""), size('5Pb 2P2nP')) | |
| # ellipses | |
| check(Ellipsis, size('')) | |
| # EncodingMap | |
| import codecs, encodings.iso8859_3 | |
| x = codecs.charmap_build(encodings.iso8859_3.decoding_table) | |
| check(x, size('32B2iB')) | |
| # enumerate | |
| check(enumerate([]), size('n3P')) | |
| # reverse | |
| check(reversed(''), size('nP')) | |
| # float | |
| check(float(0), size('d')) | |
| # sys.floatinfo | |
| check(sys.float_info, vsize('') + self.P * len(sys.float_info)) | |
| # frame | |
| import inspect | |
| CO_MAXBLOCKS = 20 | |
| x = inspect.currentframe() | |
| ncells = len(x.f_code.co_cellvars) | |
| nfrees = len(x.f_code.co_freevars) | |
| extras = x.f_code.co_stacksize + x.f_code.co_nlocals +\ | |
| ncells + nfrees - 1 | |
| check(x, vsize('4Pi2c4P3ic' + CO_MAXBLOCKS*'3i' + 'P' + extras*'P')) | |
| # function | |
| def func(): pass | |
| check(func, size('14P')) | |
| class c(): | |
| @staticmethod | |
| def foo(): | |
| pass | |
| @classmethod | |
| def bar(cls): | |
| pass | |
| # staticmethod | |
| check(foo, size('PP')) | |
| # classmethod | |
| check(bar, size('PP')) | |
| # generator | |
| def get_gen(): yield 1 | |
| check(get_gen(), size('P2PPP4P')) | |
| # iterator | |
| check(iter('abc'), size('lP')) | |
| # callable-iterator | |
| import re | |
| check(re.finditer('',''), size('2P')) | |
| # list | |
| samples = [[], [1,2,3], ['1', '2', '3']] | |
| for sample in samples: | |
| check(list(sample), vsize('Pn') + len(sample)*self.P) | |
| # sortwrapper (list) | |
| # XXX | |
| # cmpwrapper (list) | |
| # XXX | |
| # listiterator (list) | |
| check(iter([]), size('lP')) | |
| # listreverseiterator (list) | |
| check(reversed([]), size('nP')) | |
| # int | |
| check(0, vsize('')) | |
| check(1, vsize('') + self.longdigit) | |
| check(-1, vsize('') + self.longdigit) | |
| PyLong_BASE = 2**sys.int_info.bits_per_digit | |
| check(int(PyLong_BASE), vsize('') + 2*self.longdigit) | |
| check(int(PyLong_BASE**2-1), vsize('') + 2*self.longdigit) | |
| check(int(PyLong_BASE**2), vsize('') + 3*self.longdigit) | |
| # module | |
| check(unittest, size('PnPPP')) | |
| # None | |
| check(None, size('')) | |
| # NotImplementedType | |
| check(NotImplemented, size('')) | |
| # object | |
| check(object(), size('')) | |
| # property (descriptor object) | |
| class C(object): | |
| def getx(self): return self.__x | |
| def setx(self, value): self.__x = value | |
| def delx(self): del self.__x | |
| x = property(getx, setx, delx, "") | |
| check(x, size('5Pi')) | |
| # PyCapsule | |
| # XXX | |
| # rangeiterator | |
| check(iter(range(1)), size('4l')) | |
| # reverse | |
| check(reversed(''), size('nP')) | |
| # range | |
| check(range(1), size('4P')) | |
| check(range(66000), size('4P')) | |
| # set | |
| # frozenset | |
| PySet_MINSIZE = 8 | |
| samples = [[], range(10), range(50)] | |
| s = size('3nP' + PySet_MINSIZE*'nP' + '2nP') | |
| for sample in samples: | |
| minused = len(sample) | |
| if minused == 0: tmp = 1 | |
| # the computation of minused is actually a bit more complicated | |
| # but this suffices for the sizeof test | |
| minused = minused*2 | |
| newsize = PySet_MINSIZE | |
| while newsize <= minused: | |
| newsize = newsize << 1 | |
| if newsize <= 8: | |
| check(set(sample), s) | |
| check(frozenset(sample), s) | |
| else: | |
| check(set(sample), s + newsize*calcsize('nP')) | |
| check(frozenset(sample), s + newsize*calcsize('nP')) | |
| # setiterator | |
| check(iter(set()), size('P3n')) | |
| # slice | |
| check(slice(0), size('3P')) | |
| # super | |
| check(super(int), size('3P')) | |
| # tuple | |
| check((), vsize('')) | |
| check((1,2,3), vsize('') + 3*self.P) | |
| # type | |
| # static type: PyTypeObject | |
| fmt = 'P2nPI13Pl4Pn9Pn11PIPP' | |
| s = vsize(fmt) | |
| check(int, s) | |
| # class | |
| s = vsize(fmt + # PyTypeObject | |
| '4P' # PyAsyncMethods | |
| '36P' # PyNumberMethods | |
| '3P' # PyMappingMethods | |
| '10P' # PySequenceMethods | |
| '2P' # PyBufferProcs | |
| '5P') | |
| class newstyleclass(object): pass | |
| # Separate block for PyDictKeysObject with 8 keys and 5 entries | |
| check(newstyleclass, s + calcsize("2nP2n0P") + 8 + 5*calcsize("n2P")) | |
| # dict with shared keys | |
| check(newstyleclass().__dict__, size('nQ2P') + 5*self.P) | |
| o = newstyleclass() | |
| o.a = o.b = o.c = o.d = o.e = o.f = o.g = o.h = 1 | |
| # Separate block for PyDictKeysObject with 16 keys and 10 entries | |
| check(newstyleclass, s + calcsize("2nP2n0P") + 16 + 10*calcsize("n2P")) | |
| # dict with shared keys | |
| check(newstyleclass().__dict__, size('nQ2P') + 10*self.P) | |
| # unicode | |
| # each tuple contains a string and its expected character size | |
| # don't put any static strings here, as they may contain | |
| # wchar_t or UTF-8 representations | |
| samples = ['1'*100, '\xff'*50, | |
| '\u0100'*40, '\uffff'*100, | |
| '\U00010000'*30, '\U0010ffff'*100] | |
| asciifields = "nnbP" | |
| compactfields = asciifields + "nPn" | |
| unicodefields = compactfields + "P" | |
| for s in samples: | |
| maxchar = ord(max(s)) | |
| if maxchar < 128: | |
| L = size(asciifields) + len(s) + 1 | |
| elif maxchar < 256: | |
| L = size(compactfields) + len(s) + 1 | |
| elif maxchar < 65536: | |
| L = size(compactfields) + 2*(len(s) + 1) | |
| else: | |
| L = size(compactfields) + 4*(len(s) + 1) | |
| check(s, L) | |
| # verify that the UTF-8 size is accounted for | |
| s = chr(0x4000) # 4 bytes canonical representation | |
| check(s, size(compactfields) + 4) | |
| # compile() will trigger the generation of the UTF-8 | |
| # representation as a side effect | |
| compile(s, "<stdin>", "eval") | |
| check(s, size(compactfields) + 4 + 4) | |
| # TODO: add check that forces the presence of wchar_t representation | |
| # TODO: add check that forces layout of unicodefields | |
| # weakref | |
| import weakref | |
| check(weakref.ref(int), size('2Pn2P')) | |
| # weakproxy | |
| # XXX | |
| # weakcallableproxy | |
| check(weakref.proxy(int), size('2Pn2P')) | |
| def check_slots(self, obj, base, extra): | |
| expected = sys.getsizeof(base) + struct.calcsize(extra) | |
| if gc.is_tracked(obj) and not gc.is_tracked(base): | |
| expected += self.gc_headsize | |
| self.assertEqual(sys.getsizeof(obj), expected) | |
| def test_slots(self): | |
| # check all subclassable types defined in Objects/ that allow | |
| # non-empty __slots__ | |
| check = self.check_slots | |
| class BA(bytearray): | |
| __slots__ = 'a', 'b', 'c' | |
| check(BA(), bytearray(), '3P') | |
| class D(dict): | |
| __slots__ = 'a', 'b', 'c' | |
| check(D(x=[]), {'x': []}, '3P') | |
| class L(list): | |
| __slots__ = 'a', 'b', 'c' | |
| check(L(), [], '3P') | |
| class S(set): | |
| __slots__ = 'a', 'b', 'c' | |
| check(S(), set(), '3P') | |
| class FS(frozenset): | |
| __slots__ = 'a', 'b', 'c' | |
| check(FS(), frozenset(), '3P') | |
| from collections import OrderedDict | |
| class OD(OrderedDict): | |
| __slots__ = 'a', 'b', 'c' | |
| check(OD(x=[]), OrderedDict(x=[]), '3P') | |
| def test_pythontypes(self): | |
| # check all types defined in Python/ | |
| size = test.support.calcobjsize | |
| vsize = test.support.calcvobjsize | |
| check = self.check_sizeof | |
| # _ast.AST | |
| import _ast | |
| check(_ast.AST(), size('P')) | |
| try: | |
| raise TypeError | |
| except TypeError: | |
| tb = sys.exc_info()[2] | |
| # traceback | |
| if tb is not None: | |
| check(tb, size('2P2i')) | |
| # symtable entry | |
| # XXX | |
| # sys.flags | |
| check(sys.flags, vsize('') + self.P * len(sys.flags)) | |
| def test_asyncgen_hooks(self): | |
| old = sys.get_asyncgen_hooks() | |
| self.assertIsNone(old.firstiter) | |
| self.assertIsNone(old.finalizer) | |
| firstiter = lambda *a: None | |
| sys.set_asyncgen_hooks(firstiter=firstiter) | |
| hooks = sys.get_asyncgen_hooks() | |
| self.assertIs(hooks.firstiter, firstiter) | |
| self.assertIs(hooks[0], firstiter) | |
| self.assertIs(hooks.finalizer, None) | |
| self.assertIs(hooks[1], None) | |
| finalizer = lambda *a: None | |
| sys.set_asyncgen_hooks(finalizer=finalizer) | |
| hooks = sys.get_asyncgen_hooks() | |
| self.assertIs(hooks.firstiter, firstiter) | |
| self.assertIs(hooks[0], firstiter) | |
| self.assertIs(hooks.finalizer, finalizer) | |
| self.assertIs(hooks[1], finalizer) | |
| sys.set_asyncgen_hooks(*old) | |
| cur = sys.get_asyncgen_hooks() | |
| self.assertIsNone(cur.firstiter) | |
| self.assertIsNone(cur.finalizer) | |
| def test_changing_sys_stderr_and_removing_reference(self): | |
| # If the default displayhook doesn't take a strong reference | |
| # to sys.stderr the following code can crash. See bpo-43660 | |
| # for more details. | |
| code = textwrap.dedent(''' | |
| import sys | |
| class MyStderr: | |
| def write(self, s): | |
| sys.stderr = None | |
| sys.stderr = MyStderr() | |
| 1/0 | |
| ''') | |
| rc, out, err = assert_python_failure('-c', code) | |
| self.assertEqual(out, b"") | |
| self.assertEqual(err, b"") | |
| if __name__ == "__main__": | |
| unittest.main() |