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2531 lines (2207 loc) · 98 KB
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import builtins
import codecs
import gc
import io
import locale
import operator
import os
import random
import shutil
import socket
import struct
import subprocess
import sys
import sysconfig
import test.support
from io import StringIO
from unittest import mock
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.socket_helper import find_unused_port
from test.support import threading_helper
from test.support import import_helper
from test.support import force_not_colorized
from test.support import SHORT_TIMEOUT
try:
from concurrent import interpreters
except ImportError:
interpreters = None
import textwrap
import unittest
import warnings
def requires_subinterpreters(meth):
"""Decorator to skip a test if subinterpreters are not supported."""
return unittest.skipIf(interpreters is None,
'subinterpreters required')(meth)
DICT_KEY_STRUCT_FORMAT = 'n2BI2n'
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.assertNotHasAttr(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)
def test_gh130163(self):
class X:
def __repr__(self):
sys.stdout = io.StringIO()
support.gc_collect()
return 'foo'
with support.swap_attr(sys, 'stdout', None):
sys.stdout = io.StringIO() # the only reference
sys.displayhook(X()) # should not crash
class ActiveExceptionTests(unittest.TestCase):
def test_exc_info_no_exception(self):
self.assertEqual(sys.exc_info(), (None, None, None))
def test_sys_exception_no_exception(self):
self.assertEqual(sys.exception(), None)
def test_exc_info_with_exception_instance(self):
def f():
raise ValueError(42)
try:
f()
except Exception as e_:
e = e_
exc_info = sys.exc_info()
self.assertIsInstance(e, ValueError)
self.assertIs(exc_info[0], ValueError)
self.assertIs(exc_info[1], e)
self.assertIs(exc_info[2], e.__traceback__)
def test_exc_info_with_exception_type(self):
def f():
raise ValueError
try:
f()
except Exception as e_:
e = e_
exc_info = sys.exc_info()
self.assertIsInstance(e, ValueError)
self.assertIs(exc_info[0], ValueError)
self.assertIs(exc_info[1], e)
self.assertIs(exc_info[2], e.__traceback__)
def test_sys_exception_with_exception_instance(self):
def f():
raise ValueError(42)
try:
f()
except Exception as e_:
e = e_
exc = sys.exception()
self.assertIsInstance(e, ValueError)
self.assertIs(exc, e)
def test_sys_exception_with_exception_type(self):
def f():
raise ValueError
try:
f()
except Exception as e_:
e = e_
exc = sys.exception()
self.assertIsInstance(e, ValueError)
self.assertIs(exc, e)
class ExceptHookTest(unittest.TestCase):
@force_not_colorized
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.assertEndsWith(err.getvalue(), "ValueError: 42\n")
self.assertRaises(TypeError, sys.__excepthook__)
@force_not_colorized
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.assertEndsWith(err, "SyntaxError: msg\n")
def test_excepthook(self):
with test.support.captured_output("stderr") as stderr:
with test.support.catch_unraisable_exception():
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'')
# gh-125842: Windows uses 32-bit unsigned integers for exit codes
# so a -1 exit code is sometimes interpreted as 0xffff_ffff.
rc, out, err = assert_python_failure('-c', 'import sys; sys.exit(0xffff_ffff)')
self.assertIn(rc, (-1, 0xff, 0xffff_ffff))
self.assertEqual(out, b'')
self.assertEqual(err, b'')
# Overflow results in a -1 exit code, which may be converted to 0xff
# or 0xffff_ffff.
rc, out, err = assert_python_failure('-c', 'import sys; sys.exit(2**128)')
self.assertIn(rc, (-1, 0xff, 0xffff_ffff))
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'')
# test EXIT_SUCCESS and EXIT_FAILURE constants
self.assertNotEqual(sys.EXIT_SUCCESS, sys.EXIT_FAILURE)
rc, out, err = assert_python_ok('-c', 'import sys; sys.exit(sys.EXIT_SUCCESS)')
self.assertEqual(rc, sys.EXIT_SUCCESS)
self.assertEqual(out, b'')
self.assertEqual(err, b'')
rc, out, err = assert_python_failure('-c', 'import sys; sys.exit(sys.EXIT_FAILURE)')
self.assertEqual(rc, sys.EXIT_FAILURE)
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.assertStartsWith(err, 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')
@support.requires_subprocess()
def test_exit_codes_under_repl(self):
# GH-129900: SystemExit, or things that raised it, didn't
# get their return code propagated by the REPL
import tempfile
exit_ways = [
"exit",
"__import__('sys').exit",
"raise SystemExit"
]
for exitfunc in exit_ways:
for return_code in (0, 123):
with self.subTest(exitfunc=exitfunc, return_code=return_code):
with tempfile.TemporaryFile("w+") as stdin:
stdin.write(f"{exitfunc}({return_code})\n")
stdin.seek(0)
proc = subprocess.run([sys.executable], stdin=stdin)
self.assertEqual(proc.returncode, return_code)
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_getrecursionlimit(self):
limit = sys.getrecursionlimit()
self.assertIsInstance(limit, int)
self.assertGreater(limit, 1)
self.assertRaises(TypeError, sys.getrecursionlimit, 42)
def test_setrecursionlimit(self):
old_limit = sys.getrecursionlimit()
try:
sys.setrecursionlimit(10_005)
self.assertEqual(sys.getrecursionlimit(), 10_005)
self.assertRaises(TypeError, sys.setrecursionlimit)
self.assertRaises(ValueError, sys.setrecursionlimit, -42)
finally:
sys.setrecursionlimit(old_limit)
def test_recursionlimit_recovery(self):
if hasattr(sys, 'gettrace') and sys.gettrace():
self.skipTest('fatal error if run with a trace function')
old_limit = 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(old_limit)
@test.support.cpython_only
def test_setrecursionlimit_to_depth(self):
# Issue #25274: Setting a low recursion limit must be blocked if the
# current recursion depth is already higher than limit.
old_limit = sys.getrecursionlimit()
try:
depth = support.get_recursion_depth()
with self.subTest(limit=sys.getrecursionlimit(), depth=depth):
# depth + 1 is OK
sys.setrecursionlimit(depth + 1)
# reset the limit to be able to call self.assertRaises()
# context manager
sys.setrecursionlimit(old_limit)
with self.assertRaises(RecursionError) as cm:
sys.setrecursionlimit(depth)
self.assertRegex(str(cm.exception),
"cannot set the recursion limit to [0-9]+ "
"at the recursion depth [0-9]+: "
"the limit is too low")
finally:
sys.setrecursionlimit(old_limit)
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)
support.check_immutable_type(self, type(v))
# 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.assertHasAttr(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 originally had to be a global in order for this test to pass
# while tracing with a python function. Tracing used to call
# PyFrame_FastToLocals, which would add a copy of any locals to the
# frame object, causing the ref count to increase by 2 instead of 1.
# While that no longer happens (due to PEP 667), this test case retains
# its original global-based implementation
# PEP 683's immortal objects also made this point moot, since the
# refcount for None doesn't change anyway. Maybe this test should be
# using a different constant value? (e.g. an integer)
global n
self.assertRaises(TypeError, sys.getrefcount)
c = sys.getrefcount(None)
n = None
# Singleton refcnts don't change
self.assertEqual(sys.getrefcount(None), c)
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
)
def test_getframemodulename(self):
# Default depth gets ourselves
self.assertEqual(__name__, sys._getframemodulename())
self.assertEqual("unittest.case", sys._getframemodulename(1))
i = 0
f = sys._getframe(i)
while f:
self.assertEqual(
f.f_globals['__name__'],
sys._getframemodulename(i) or '__main__'
)
i += 1
f2 = f.f_back
try:
f = sys._getframe(i)
except ValueError:
break
self.assertIs(f, f2)
self.assertIsNone(sys._getframemodulename(i))
@support.cpython_only # sys._current_frames() is a CPython-only gimmick.
@threading_helper.reap_threads
@threading_helper.requires_working_threading()
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()
try:
# 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()"])
finally:
# Reap the spawned thread.
leave_g.set()
t.join()
@support.cpython_only
@requires_subinterpreters
@threading_helper.requires_working_threading()
def test_current_frames_other_interpreters(self):
# gh-158364: sys._current_frames() would access frames of another
# interpreter and crash
import threading
entered = threading.Event()
left = threading.Event()
def park():
entered.set()
left.wait()
t = threading.Thread(target=park)
with threading_helper.start_threads([t], unlock=left.set):
entered.wait()
interp = interpreters.create()
try:
interp.exec(f"""if True:
import sys
import threading
frames = sys._current_frames()
assert threading.get_ident() in frames, frames
assert frames[threading.get_ident()].f_globals is globals()
assert {t.ident} not in frames, frames
""")
finally:
interp.close()
@threading_helper.reap_threads
@threading_helper.requires_working_threading()
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.
g_raised = threading.Event()
leave_g = threading.Event()
thread_info = [] # the thread's id
def f123():
g456()
def g456():
thread_info.append(threading.get_ident())
while True:
try:
raise ValueError("oops")
except ValueError:
g_raised.set()
if leave_g.wait(timeout=support.LONG_TIMEOUT):
break
t = threading.Thread(target=f123)
t.start()
g_raised.wait(timeout=support.LONG_TIMEOUT)
try:
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, 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_value = d.pop(thread_id)
stack = traceback.extract_stack(exc_value.__traceback__.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.assertStartsWith(sourceline, ("if leave_g.wait(", "g_raised.set()"))
finally:
# Reap the spawned thread.
leave_g.set()
t.join()
@support.cpython_only
@requires_subinterpreters
@threading_helper.requires_working_threading()
def test_current_exceptions_other_interpreters(self):
# gh-158364: sys._current_exceptions() would hand out exceptions of
# another interpreter and crash
import threading
entered = threading.Event()
left = threading.Event()
def hold():
# The thread has to be handling an exception, otherwise
# sys._current_exceptions() has nothing to report for it.
try:
raise ValueError
except ValueError:
entered.set()
left.wait()
t = threading.Thread(target=hold)
with threading_helper.start_threads([t], unlock=left.set):
entered.wait()
interp = interpreters.create()
try:
interp.exec(f"""if True:
import sys
assert {t.ident} not in sys._current_exceptions()
""")
finally:
interp.close()
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), 4)
self.assertTrue(sys.int_info.bits_per_digit % 5 == 0)
self.assertTrue(sys.int_info.sizeof_digit >= 1)
self.assertGreaterEqual(sys.int_info.default_max_str_digits, 500)
self.assertGreaterEqual(sys.int_info.str_digits_check_threshold, 100)
self.assertGreater(sys.int_info.default_max_str_digits,
sys.int_info.str_digits_check_threshold)
self.assertEqual(type(sys.int_info.bits_per_digit), int)
self.assertEqual(type(sys.int_info.sizeof_digit), int)
self.assertIsInstance(sys.int_info.default_max_str_digits, int)
self.assertIsInstance(sys.int_info.str_digits_check_threshold, 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", "siphash13", "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")
elif algo == 3:
self.assertEqual(sys.hash_info.algorithm, "siphash13")
else:
self.assertIn(sys.hash_info.algorithm, {"fnv", "siphash13", "siphash24"})
else:
# PY_HASH_EXTERNAL
self.assertEqual(algo, 0)
self.assertGreaterEqual(sys.hash_info.cutoff, 0)
self.assertLess(sys.hash_info.cutoff, 8)
support.check_immutable_type(self, type(sys.hash_info))
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)
else:
self.assertFalse(hasattr(sys, 'abiflags'))
def test_thread_info(self):
info = sys.thread_info
self.assertEqual(len(info), 3)
self.assertIn(info.name, ('nt', 'pthread', 'pthread-stubs', 'solaris', None))
self.assertIn(info.lock, ('pymutex', None))
if sys.platform.startswith(("linux", "android", "freebsd", "wasi")):
self.assertEqual(info.name, "pthread")
elif sys.platform == "win32":
self.assertEqual(info.name, "nt")
elif sys.platform == "emscripten":
self.assertIn(info.name, {"pthread", "pthread-stubs"})
def test_abi_info(self):
info = sys.abi_info
info_keys = {'pointer_bits', 'free_threaded', 'debug', 'byteorder'}
self.assertEqual(set(vars(info)), info_keys)
pointer_bits = 64 if sys.maxsize > 2**32 else 32
self.assertEqual(info.pointer_bits, pointer_bits)
self.assertEqual(info.free_threaded,
bool(sysconfig.get_config_var('Py_GIL_DISABLED')))
self.assertEqual(info.debug,
bool(sysconfig.get_config_var('Py_DEBUG')))
self.assertEqual(info.byteorder, sys.byteorder)
@unittest.skipUnless(support.is_emscripten, "only available on Emscripten")
def test_emscripten_info(self):
self.assertEqual(len(sys._emscripten_info), 4)
self.assertIsInstance(sys._emscripten_info.emscripten_version, tuple)
self.assertIsInstance(sys._emscripten_info.runtime, (str, type(None)))
self.assertIsInstance(sys._emscripten_info.pthreads, bool)
self.assertIsInstance(sys._emscripten_info.shared_memory, bool)
@unittest.skipUnless(support.is_wasi, "only available on WASI")
def test_wasi_info(self):
info = sys._wasi_info
self.assertIn(info.wasi_version, {'p1', 'p2', 'p3'})
self.assertIn('.', info.wasi_sdk_version)
sdk_major, _, sdk_minor = info.wasi_sdk_version.partition('.')
self.assertGreaterEqual(int(sdk_major), 1)
self.assertGreaterEqual(int(sdk_minor), 0)
self.assertIsInstance(info.cooperative_threads, bool)
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):
has_is_interned = (test.support.check_impl_detail(cpython=True)
or hasattr(sys, '_is_interned'))
self.assertRaises(TypeError, sys.intern)
self.assertRaises(TypeError, sys.intern, b'abc')
if has_is_interned:
self.assertRaises(TypeError, sys._is_interned)
self.assertRaises(TypeError, sys._is_interned, b'abc')
s = "never interned before" + str(random.randrange(0, 10**9))
self.assertTrue(sys.intern(s) is s)
if has_is_interned:
self.assertIs(sys._is_interned(s), True)
s2 = s.swapcase().swapcase()
if has_is_interned:
self.assertIs(sys._is_interned(s2), False)
self.assertTrue(sys.intern(s2) is s)
if has_is_interned:
self.assertIs(sys._is_interned(s2), False)
# 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"))
if has_is_interned:
self.assertIs(sys._is_interned(S("abc")), False)
@support.cpython_only
@requires_subinterpreters
def test_subinterp_intern_dynamically_allocated(self):
# Implementation detail: Dynamically allocated strings
# are distinct between interpreters
s = "never interned before" + str(random.randrange(0, 10**9))
t = sys.intern(s)
self.assertIs(t, s)
interp = interpreters.create()
interp.exec(textwrap.dedent(f'''
import sys
# set `s`, avoid parser interning & constant folding
s = str({s.encode()!r}, 'utf-8')
t = sys.intern(s)
assert id(t) != {id(s)}, (id(t), {id(s)})
assert id(t) != {id(t)}, (id(t), {id(t)})
'''))
@support.cpython_only
@requires_subinterpreters
def test_subinterp_intern_statically_allocated(self):
# Implementation detail: Statically allocated strings are shared
# between interpreters.
# See Tools/build/generate_global_objects.py for the list
# of strings that are always statically allocated.
for s in ('__init__', 'CANCELLED', '<module>', 'utf-8',
'{{', '', '\n', '_', 'x', '\0', '\N{CEDILLA}', '\xff',
):
with self.subTest(s=s):
t = sys.intern(s)
interp = interpreters.create()
interp.exec(textwrap.dedent(f'''
import sys
# set `s`, avoid parser interning & constant folding
s = str({s.encode()!r}, 'utf-8')
t = sys.intern(s)
assert id(t) == {id(t)}, (id(t), {id(t)})
'''))
@support.cpython_only
@requires_subinterpreters
def test_subinterp_intern_singleton(self):
# Implementation detail: singletons are used for 0- and 1-character
# latin1 strings.
for s in '', '\n', '_', 'x', '\0', '\N{CEDILLA}', '\xff':
with self.subTest(s=s):
interp = interpreters.create()
interp.exec(textwrap.dedent(f'''
import sys
# set `s`, avoid parser interning & constant folding
s = str({s.encode()!r}, 'utf-8')
assert id(s) == {id(s)}
t = sys.intern(s)
'''))
self.assertTrue(sys._is_interned(s))
def test_sys_flags_indexable_attributes(self):
self.assertTrue(sys.flags)
# We've stopped assigning sequence indices to new sys.flags attributes:
# https://github.com/python/cpython/issues/122575#issuecomment-2416497086
indexable_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", "safe_path", "int_max_str_digits")
for attr_idx, attr in enumerate(indexable_attrs):
self.assertHasAttr(sys.flags, attr)
attr_type = bool if attr in ("dev_mode", "safe_path") else int
self.assertEqual(type(getattr(sys.flags, attr)), attr_type, attr)
attr_value = getattr(sys.flags, attr)
self.assertEqual(sys.flags[attr_idx], attr_value,
msg=f"sys.flags .{attr} vs [{attr_idx}]")
self.assertTrue(repr(sys.flags))
self.assertEqual(len(sys.flags), 18, msg="Do not increase, see GH-122575")
self.assertIn(sys.flags.utf8_mode, {0, 1, 2})
def test_sys_flags_name_only_attributes(self):
# non-tuple sequence fields (name only sys.flags attributes)
self.assertIsInstance(sys.flags.gil, int|type(None))
self.assertIsInstance(sys.flags.thread_inherit_context, int|type(None))
self.assertIsInstance(sys.flags.context_aware_warnings, int|type(None))
self.assertIsInstance(sys.flags.lazy_imports, int|type(None))
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.
support.check_disallow_instantiation(self, type(sys_attr), sys_attr)
def test_sys_flags_type(self):
self.assert_raise_on_new_sys_type(sys.flags)
support.check_immutable_type(self, type(sys.flags))
def test_sys_version_info_type(self):
self.assert_raise_on_new_sys_type(sys.version_info)
support.check_immutable_type(self, 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):
with self.assertWarnsRegex(DeprecationWarning,
r"sys\._clear_type_cache\(\) is deprecated.*"):