mirror of https://github.com/python/cpython
1815 lines
69 KiB
Python
1815 lines
69 KiB
Python
import builtins
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import codecs
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import _datetime
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import gc
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import locale
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import operator
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import os
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import random
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import struct
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import subprocess
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import sys
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import sysconfig
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import test.support
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from test import support
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from test.support import os_helper
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from test.support.script_helper import assert_python_ok, assert_python_failure
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from test.support import threading_helper
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from test.support import import_helper
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try:
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from test.support import interpreters
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except ImportError:
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interpreters = None
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import textwrap
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import unittest
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import warnings
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def requires_subinterpreters(meth):
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"""Decorator to skip a test if subinterpreters are not supported."""
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return unittest.skipIf(interpreters is None,
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'subinterpreters required')(meth)
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DICT_KEY_STRUCT_FORMAT = 'n2BI2n'
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class DisplayHookTest(unittest.TestCase):
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def test_original_displayhook(self):
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dh = sys.__displayhook__
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with support.captured_stdout() as out:
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dh(42)
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self.assertEqual(out.getvalue(), "42\n")
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self.assertEqual(builtins._, 42)
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del builtins._
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with support.captured_stdout() as out:
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dh(None)
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self.assertEqual(out.getvalue(), "")
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self.assertTrue(not hasattr(builtins, "_"))
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# sys.displayhook() requires arguments
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self.assertRaises(TypeError, dh)
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stdout = sys.stdout
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try:
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del sys.stdout
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self.assertRaises(RuntimeError, dh, 42)
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finally:
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sys.stdout = stdout
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def test_lost_displayhook(self):
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displayhook = sys.displayhook
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try:
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del sys.displayhook
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code = compile("42", "<string>", "single")
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self.assertRaises(RuntimeError, eval, code)
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finally:
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sys.displayhook = displayhook
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def test_custom_displayhook(self):
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def baddisplayhook(obj):
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raise ValueError
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with support.swap_attr(sys, 'displayhook', baddisplayhook):
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code = compile("42", "<string>", "single")
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self.assertRaises(ValueError, eval, code)
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class ActiveExceptionTests(unittest.TestCase):
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def test_exc_info_no_exception(self):
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self.assertEqual(sys.exc_info(), (None, None, None))
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def test_sys_exception_no_exception(self):
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self.assertEqual(sys.exception(), None)
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def test_exc_info_with_exception_instance(self):
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def f():
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raise ValueError(42)
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try:
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f()
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except Exception as e_:
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e = e_
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exc_info = sys.exc_info()
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self.assertIsInstance(e, ValueError)
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self.assertIs(exc_info[0], ValueError)
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self.assertIs(exc_info[1], e)
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self.assertIs(exc_info[2], e.__traceback__)
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def test_exc_info_with_exception_type(self):
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def f():
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raise ValueError
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try:
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f()
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except Exception as e_:
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e = e_
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exc_info = sys.exc_info()
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self.assertIsInstance(e, ValueError)
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self.assertIs(exc_info[0], ValueError)
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self.assertIs(exc_info[1], e)
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self.assertIs(exc_info[2], e.__traceback__)
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def test_sys_exception_with_exception_instance(self):
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def f():
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raise ValueError(42)
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try:
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f()
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except Exception as e_:
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e = e_
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exc = sys.exception()
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self.assertIsInstance(e, ValueError)
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self.assertIs(exc, e)
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def test_sys_exception_with_exception_type(self):
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def f():
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raise ValueError
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try:
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f()
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except Exception as e_:
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e = e_
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exc = sys.exception()
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self.assertIsInstance(e, ValueError)
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self.assertIs(exc, e)
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class ExceptHookTest(unittest.TestCase):
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def test_original_excepthook(self):
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try:
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raise ValueError(42)
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except ValueError as exc:
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with support.captured_stderr() as err:
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sys.__excepthook__(*sys.exc_info())
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self.assertTrue(err.getvalue().endswith("ValueError: 42\n"))
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self.assertRaises(TypeError, sys.__excepthook__)
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def test_excepthook_bytes_filename(self):
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# bpo-37467: sys.excepthook() must not crash if a filename
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# is a bytes string
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with warnings.catch_warnings():
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warnings.simplefilter('ignore', BytesWarning)
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try:
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raise SyntaxError("msg", (b"bytes_filename", 123, 0, "text"))
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except SyntaxError as exc:
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with support.captured_stderr() as err:
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sys.__excepthook__(*sys.exc_info())
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err = err.getvalue()
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self.assertIn(""" File "b'bytes_filename'", line 123\n""", err)
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self.assertIn(""" text\n""", err)
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self.assertTrue(err.endswith("SyntaxError: msg\n"))
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def test_excepthook(self):
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with test.support.captured_output("stderr") as stderr:
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with test.support.catch_unraisable_exception():
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sys.excepthook(1, '1', 1)
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self.assertTrue("TypeError: print_exception(): Exception expected for " \
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"value, str found" in stderr.getvalue())
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# FIXME: testing the code for a lost or replaced excepthook in
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# Python/pythonrun.c::PyErr_PrintEx() is tricky.
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class SysModuleTest(unittest.TestCase):
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def tearDown(self):
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test.support.reap_children()
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def test_exit(self):
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# call with two arguments
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self.assertRaises(TypeError, sys.exit, 42, 42)
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# call without argument
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with self.assertRaises(SystemExit) as cm:
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sys.exit()
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self.assertIsNone(cm.exception.code)
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rc, out, err = assert_python_ok('-c', 'import sys; sys.exit()')
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self.assertEqual(rc, 0)
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self.assertEqual(out, b'')
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self.assertEqual(err, b'')
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# call with integer argument
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with self.assertRaises(SystemExit) as cm:
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sys.exit(42)
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self.assertEqual(cm.exception.code, 42)
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# call with tuple argument with one entry
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# entry will be unpacked
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with self.assertRaises(SystemExit) as cm:
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sys.exit((42,))
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self.assertEqual(cm.exception.code, 42)
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# call with string argument
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with self.assertRaises(SystemExit) as cm:
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sys.exit("exit")
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self.assertEqual(cm.exception.code, "exit")
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# call with tuple argument with two entries
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with self.assertRaises(SystemExit) as cm:
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sys.exit((17, 23))
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self.assertEqual(cm.exception.code, (17, 23))
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# test that the exit machinery handles SystemExits properly
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rc, out, err = assert_python_failure('-c', 'raise SystemExit(47)')
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self.assertEqual(rc, 47)
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self.assertEqual(out, b'')
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self.assertEqual(err, b'')
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def check_exit_message(code, expected, **env_vars):
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rc, out, err = assert_python_failure('-c', code, **env_vars)
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self.assertEqual(rc, 1)
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self.assertEqual(out, b'')
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self.assertTrue(err.startswith(expected),
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"%s doesn't start with %s" % (ascii(err), ascii(expected)))
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# test that stderr buffer is flushed before the exit message is written
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# into stderr
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check_exit_message(
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r'import sys; sys.stderr.write("unflushed,"); sys.exit("message")',
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b"unflushed,message")
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# test that the exit message is written with backslashreplace error
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# handler to stderr
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check_exit_message(
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r'import sys; sys.exit("surrogates:\uDCFF")',
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b"surrogates:\\udcff")
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# test that the unicode message is encoded to the stderr encoding
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# instead of the default encoding (utf8)
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check_exit_message(
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r'import sys; sys.exit("h\xe9")',
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b"h\xe9", PYTHONIOENCODING='latin-1')
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def test_getdefaultencoding(self):
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self.assertRaises(TypeError, sys.getdefaultencoding, 42)
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# can't check more than the type, as the user might have changed it
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self.assertIsInstance(sys.getdefaultencoding(), str)
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# testing sys.settrace() is done in test_sys_settrace.py
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# testing sys.setprofile() is done in test_sys_setprofile.py
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def test_switchinterval(self):
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self.assertRaises(TypeError, sys.setswitchinterval)
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self.assertRaises(TypeError, sys.setswitchinterval, "a")
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self.assertRaises(ValueError, sys.setswitchinterval, -1.0)
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self.assertRaises(ValueError, sys.setswitchinterval, 0.0)
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orig = sys.getswitchinterval()
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# sanity check
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self.assertTrue(orig < 0.5, orig)
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try:
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for n in 0.00001, 0.05, 3.0, orig:
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sys.setswitchinterval(n)
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self.assertAlmostEqual(sys.getswitchinterval(), n)
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finally:
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sys.setswitchinterval(orig)
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def test_getrecursionlimit(self):
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limit = sys.getrecursionlimit()
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self.assertIsInstance(limit, int)
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self.assertGreater(limit, 1)
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self.assertRaises(TypeError, sys.getrecursionlimit, 42)
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def test_setrecursionlimit(self):
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old_limit = sys.getrecursionlimit()
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try:
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sys.setrecursionlimit(10_005)
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self.assertEqual(sys.getrecursionlimit(), 10_005)
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self.assertRaises(TypeError, sys.setrecursionlimit)
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self.assertRaises(ValueError, sys.setrecursionlimit, -42)
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finally:
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sys.setrecursionlimit(old_limit)
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def test_recursionlimit_recovery(self):
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if hasattr(sys, 'gettrace') and sys.gettrace():
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self.skipTest('fatal error if run with a trace function')
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old_limit = sys.getrecursionlimit()
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def f():
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f()
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try:
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for depth in (50, 75, 100, 250, 1000):
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try:
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sys.setrecursionlimit(depth)
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except RecursionError:
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# Issue #25274: The recursion limit is too low at the
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# current recursion depth
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continue
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# Issue #5392: test stack overflow after hitting recursion
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# limit twice
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with self.assertRaises(RecursionError):
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f()
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with self.assertRaises(RecursionError):
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f()
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finally:
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sys.setrecursionlimit(old_limit)
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@test.support.cpython_only
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def test_setrecursionlimit_to_depth(self):
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# Issue #25274: Setting a low recursion limit must be blocked if the
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# current recursion depth is already higher than limit.
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old_limit = sys.getrecursionlimit()
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try:
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depth = support.get_recursion_depth()
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with self.subTest(limit=sys.getrecursionlimit(), depth=depth):
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# depth + 1 is OK
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sys.setrecursionlimit(depth + 1)
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# reset the limit to be able to call self.assertRaises()
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# context manager
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sys.setrecursionlimit(old_limit)
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with self.assertRaises(RecursionError) as cm:
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sys.setrecursionlimit(depth)
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self.assertRegex(str(cm.exception),
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"cannot set the recursion limit to [0-9]+ "
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"at the recursion depth [0-9]+: "
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"the limit is too low")
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finally:
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sys.setrecursionlimit(old_limit)
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def test_getwindowsversion(self):
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# Raise SkipTest if sys doesn't have getwindowsversion attribute
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test.support.get_attribute(sys, "getwindowsversion")
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v = sys.getwindowsversion()
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self.assertEqual(len(v), 5)
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self.assertIsInstance(v[0], int)
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self.assertIsInstance(v[1], int)
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self.assertIsInstance(v[2], int)
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self.assertIsInstance(v[3], int)
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self.assertIsInstance(v[4], str)
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self.assertRaises(IndexError, operator.getitem, v, 5)
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self.assertIsInstance(v.major, int)
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self.assertIsInstance(v.minor, int)
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self.assertIsInstance(v.build, int)
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self.assertIsInstance(v.platform, int)
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self.assertIsInstance(v.service_pack, str)
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self.assertIsInstance(v.service_pack_minor, int)
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self.assertIsInstance(v.service_pack_major, int)
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self.assertIsInstance(v.suite_mask, int)
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self.assertIsInstance(v.product_type, int)
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self.assertEqual(v[0], v.major)
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self.assertEqual(v[1], v.minor)
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self.assertEqual(v[2], v.build)
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self.assertEqual(v[3], v.platform)
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self.assertEqual(v[4], v.service_pack)
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# This is how platform.py calls it. Make sure tuple
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# still has 5 elements
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maj, min, buildno, plat, csd = sys.getwindowsversion()
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def test_call_tracing(self):
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self.assertRaises(TypeError, sys.call_tracing, type, 2)
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@unittest.skipUnless(hasattr(sys, "setdlopenflags"),
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'test needs sys.setdlopenflags()')
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def test_dlopenflags(self):
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self.assertTrue(hasattr(sys, "getdlopenflags"))
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self.assertRaises(TypeError, sys.getdlopenflags, 42)
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oldflags = sys.getdlopenflags()
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self.assertRaises(TypeError, sys.setdlopenflags)
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sys.setdlopenflags(oldflags+1)
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self.assertEqual(sys.getdlopenflags(), oldflags+1)
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sys.setdlopenflags(oldflags)
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|
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@test.support.refcount_test
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def test_refcount(self):
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# n here must be a global in order for this test to pass while
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# tracing with a python function. Tracing calls PyFrame_FastToLocals
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# which will add a copy of any locals to the frame object, causing
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# the reference count to increase by 2 instead of 1.
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global n
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self.assertRaises(TypeError, sys.getrefcount)
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c = sys.getrefcount(None)
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n = None
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# Singleton refcnts don't change
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self.assertEqual(sys.getrefcount(None), c)
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del n
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self.assertEqual(sys.getrefcount(None), c)
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if hasattr(sys, "gettotalrefcount"):
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self.assertIsInstance(sys.gettotalrefcount(), int)
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|
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def test_getframe(self):
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self.assertRaises(TypeError, sys._getframe, 42, 42)
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self.assertRaises(ValueError, sys._getframe, 2000000000)
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self.assertTrue(
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SysModuleTest.test_getframe.__code__ \
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is sys._getframe().f_code
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)
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|
|
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def test_getframemodulename(self):
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# Default depth gets ourselves
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self.assertEqual(__name__, sys._getframemodulename())
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self.assertEqual("unittest.case", sys._getframemodulename(1))
|
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i = 0
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f = sys._getframe(i)
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while f:
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self.assertEqual(
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f.f_globals['__name__'],
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sys._getframemodulename(i) or '__main__'
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)
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i += 1
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f2 = f.f_back
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try:
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f = sys._getframe(i)
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except ValueError:
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break
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self.assertIs(f, f2)
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self.assertIsNone(sys._getframemodulename(i))
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|
|
# sys._current_frames() is a CPython-only gimmick.
|
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@threading_helper.reap_threads
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@threading_helper.requires_working_threading()
|
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def test_current_frames(self):
|
|
import threading
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|
import traceback
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|
|
|
# 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.
|
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entered_g = threading.Event()
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leave_g = threading.Event()
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thread_info = [] # the thread's id
|
|
|
|
def f123():
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g456()
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|
|
|
def g456():
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thread_info.append(threading.get_ident())
|
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entered_g.set()
|
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leave_g.wait()
|
|
|
|
t = threading.Thread(target=f123)
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t.start()
|
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entered_g.wait()
|
|
|
|
try:
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|
# 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
|
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# 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)
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|
self.assertGreater(tid, 0)
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|
|
|
main_id = threading.get_ident()
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|
self.assertIn(main_id, d)
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|
self.assertIn(thread_id, d)
|
|
|
|
# Verify that the captured main-thread frame is _this_ frame.
|
|
frame = d.pop(main_id)
|
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self.assertTrue(frame is sys._getframe())
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|
|
|
# Verify that the captured thread frame is blocked in g456, called
|
|
# from f123. This is a little tricky, since various bits of
|
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# threading.py are also in the thread's call stack.
|
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frame = d.pop(thread_id)
|
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stack = traceback.extract_stack(frame)
|
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for i, (filename, lineno, funcname, sourceline) in enumerate(stack):
|
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if funcname == "f123":
|
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break
|
|
else:
|
|
self.fail("didn't find f123() on thread's call stack")
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|
|
|
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()
|
|
|
|
@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.assertTrue((sourceline.startswith("if leave_g.wait(") or
|
|
sourceline.startswith("g_raised.set()")))
|
|
finally:
|
|
# 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), 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)
|
|
|
|
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', 'pthread-stubs', 'solaris', None))
|
|
self.assertIn(info.lock, ('semaphore', 'mutex+cond', None))
|
|
if sys.platform.startswith(("linux", "android", "freebsd")):
|
|
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"})
|
|
elif sys.platform == "wasi":
|
|
self.assertEqual(info.name, "pthread-stubs")
|
|
|
|
@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)
|
|
|
|
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)
|
|
|
|
@requires_subinterpreters
|
|
def test_subinterp_intern_dynamically_allocated(self):
|
|
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
|
|
t = sys.intern({s!r})
|
|
assert id(t) != {id(s)}, (id(t), {id(s)})
|
|
assert id(t) != {id(t)}, (id(t), {id(t)})
|
|
'''))
|
|
|
|
@requires_subinterpreters
|
|
def test_subinterp_intern_statically_allocated(self):
|
|
# See Tools/build/generate_global_objects.py for the list
|
|
# of strings that are always statically allocated.
|
|
s = '__init__'
|
|
t = sys.intern(s)
|
|
|
|
interp = interpreters.create()
|
|
interp.exec(textwrap.dedent(f'''
|
|
import sys
|
|
t = sys.intern({s!r})
|
|
assert id(t) == {id(t)}, (id(t), {id(t)})
|
|
'''))
|
|
|
|
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", "safe_path", "int_max_str_digits")
|
|
for attr in attrs:
|
|
self.assertTrue(hasattr(sys.flags, attr), attr)
|
|
attr_type = bool if attr in ("dev_mode", "safe_path") 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()
|
|
|
|
@support.requires_subprocess()
|
|
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')
|
|
@support.requires_subprocess()
|
|
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')
|
|
@support.requires_subprocess()
|
|
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')
|
|
|
|
@support.requires_subprocess()
|
|
def test_c_locale_surrogateescape(self):
|
|
self.check_locale_surrogateescape('C')
|
|
|
|
@support.requires_subprocess()
|
|
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)
|
|
|
|
# Output of sys._debugmallocstats() depends on configure flags.
|
|
# The sysconfig vars are not available on Windows.
|
|
if sys.platform != "win32":
|
|
with_freelists = sysconfig.get_config_var("WITH_FREELISTS")
|
|
with_pymalloc = sysconfig.get_config_var("WITH_PYMALLOC")
|
|
if with_freelists:
|
|
self.assertIn(b"free PyDictObjects", err)
|
|
if with_pymalloc:
|
|
self.assertIn(b'Small block threshold', err)
|
|
if not with_freelists and not with_pymalloc:
|
|
self.assertFalse(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 _testinternalcapi
|
|
except ImportError:
|
|
with_pymalloc = support.with_pymalloc()
|
|
else:
|
|
try:
|
|
alloc_name = _testinternalcapi.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(sys.platform == "android", "Android only")
|
|
def test_getandroidapilevel(self):
|
|
level = sys.getandroidapilevel()
|
|
self.assertIsInstance(level, int)
|
|
self.assertGreater(level, 0)
|
|
|
|
@support.requires_subprocess()
|
|
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' f2()',
|
|
b' ~~^^',
|
|
b' File "<string>", line 6, in f2',
|
|
b' f1()',
|
|
b' ~~^^',
|
|
b' File "<string>", line 4, in f1',
|
|
b' 1 / 0',
|
|
b' ~~^~~',
|
|
b'ZeroDivisionError: division by zero'
|
|
]
|
|
check(10, traceback)
|
|
check(3, traceback)
|
|
check(2, traceback[:1] + traceback[4:])
|
|
check(1, traceback[:1] + traceback[7:])
|
|
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')
|
|
|
|
@support.requires_subprocess()
|
|
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)
|
|
|
|
def test_stdlib_dir(self):
|
|
os = import_helper.import_fresh_module('os')
|
|
marker = getattr(os, '__file__', None)
|
|
if marker and not os.path.exists(marker):
|
|
marker = None
|
|
expected = os.path.dirname(marker) if marker else None
|
|
self.assertEqual(os.path.normpath(sys._stdlib_dir),
|
|
os.path.normpath(expected))
|
|
|
|
@unittest.skipUnless(hasattr(sys, 'getobjects'), 'need sys.getobjects()')
|
|
def test_getobjects(self):
|
|
# sys.getobjects(0)
|
|
all_objects = sys.getobjects(0)
|
|
self.assertIsInstance(all_objects, list)
|
|
self.assertGreater(len(all_objects), 0)
|
|
|
|
# sys.getobjects(0, MyType)
|
|
class MyType:
|
|
pass
|
|
size = 100
|
|
my_objects = [MyType() for _ in range(size)]
|
|
get_objects = sys.getobjects(0, MyType)
|
|
self.assertEqual(len(get_objects), size)
|
|
for obj in get_objects:
|
|
self.assertIsInstance(obj, MyType)
|
|
|
|
# sys.getobjects(3, MyType)
|
|
get_objects = sys.getobjects(3, MyType)
|
|
self.assertEqual(len(get_objects), 3)
|
|
|
|
@unittest.skipUnless(hasattr(sys, '_stats_on'), 'need Py_STATS build')
|
|
def test_pystats(self):
|
|
# Call the functions, just check that they don't crash
|
|
# Cannot save/restore state.
|
|
sys._stats_on()
|
|
sys._stats_off()
|
|
sys._stats_clear()
|
|
sys._stats_dump()
|
|
|
|
@test.support.cpython_only
|
|
@unittest.skipUnless(hasattr(sys, 'abiflags'), 'need sys.abiflags')
|
|
def test_disable_gil_abi(self):
|
|
self.assertEqual('t' in sys.abiflags, support.Py_GIL_DISABLED)
|
|
|
|
|
|
@test.support.cpython_only
|
|
class UnraisableHookTest(unittest.TestCase):
|
|
def test_original_unraisablehook(self):
|
|
_testcapi = import_helper.import_module('_testcapi')
|
|
from _testcapi import err_writeunraisable, err_formatunraisable
|
|
obj = hex
|
|
|
|
with support.swap_attr(sys, 'unraisablehook',
|
|
sys.__unraisablehook__):
|
|
with support.captured_stderr() as stderr:
|
|
err_writeunraisable(ValueError(42), obj)
|
|
lines = stderr.getvalue().splitlines()
|
|
self.assertEqual(lines[0], f'Exception ignored in: {obj!r}')
|
|
self.assertEqual(lines[1], 'Traceback (most recent call last):')
|
|
self.assertEqual(lines[-1], 'ValueError: 42')
|
|
|
|
with support.captured_stderr() as stderr:
|
|
err_writeunraisable(ValueError(42), None)
|
|
lines = stderr.getvalue().splitlines()
|
|
self.assertEqual(lines[0], 'Traceback (most recent call last):')
|
|
self.assertEqual(lines[-1], 'ValueError: 42')
|
|
|
|
with support.captured_stderr() as stderr:
|
|
err_formatunraisable(ValueError(42), 'Error in %R', obj)
|
|
lines = stderr.getvalue().splitlines()
|
|
self.assertEqual(lines[0], f'Error in {obj!r}:')
|
|
self.assertEqual(lines[1], 'Traceback (most recent call last):')
|
|
self.assertEqual(lines[-1], 'ValueError: 42')
|
|
|
|
with support.captured_stderr() as stderr:
|
|
err_formatunraisable(ValueError(42), None)
|
|
lines = stderr.getvalue().splitlines()
|
|
self.assertEqual(lines[0], 'Traceback (most recent call last):')
|
|
self.assertEqual(lines[-1], 'ValueError: 42')
|
|
|
|
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):
|
|
# See bpo-41031, bpo-45083.
|
|
# Check that the exception is printed with its qualified name
|
|
# rather than just classname, and the module names appears
|
|
# unless it is one of the hard-coded exclusions.
|
|
_testcapi = import_helper.import_module('_testcapi')
|
|
from _testcapi import err_writeunraisable
|
|
class A:
|
|
class B:
|
|
class X(Exception):
|
|
pass
|
|
|
|
for moduleName in 'builtins', '__main__', 'some_module':
|
|
with self.subTest(moduleName=moduleName):
|
|
A.B.X.__module__ = moduleName
|
|
with test.support.captured_stderr() as stderr, test.support.swap_attr(
|
|
sys, 'unraisablehook', sys.__unraisablehook__
|
|
):
|
|
err_writeunraisable(A.B.X(), "obj")
|
|
report = stderr.getvalue()
|
|
self.assertIn(A.B.X.__qualname__, report)
|
|
if moduleName in ['builtins', '__main__']:
|
|
self.assertNotIn(moduleName + '.', report)
|
|
else:
|
|
self.assertIn(moduleName + '.', 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):
|
|
_testcapi = import_helper.import_module('_testcapi')
|
|
from _testcapi import err_writeunraisable, err_formatunraisable
|
|
hook_args = None
|
|
|
|
def hook_func(args):
|
|
nonlocal hook_args
|
|
hook_args = args
|
|
|
|
obj = hex
|
|
try:
|
|
with test.support.swap_attr(sys, 'unraisablehook', hook_func):
|
|
exc = ValueError(42)
|
|
err_writeunraisable(exc, obj)
|
|
self.assertIs(hook_args.exc_type, type(exc))
|
|
self.assertIs(hook_args.exc_value, exc)
|
|
self.assertIs(hook_args.exc_traceback, exc.__traceback__)
|
|
self.assertIsNone(hook_args.err_msg)
|
|
self.assertEqual(hook_args.object, obj)
|
|
|
|
err_formatunraisable(exc, "custom hook %R", obj)
|
|
self.assertIs(hook_args.exc_type, type(exc))
|
|
self.assertIs(hook_args.exc_value, exc)
|
|
self.assertIs(hook_args.exc_traceback, exc.__traceback__)
|
|
self.assertEqual(hook_args.err_msg, f'custom hook {obj!r}')
|
|
self.assertIsNone(hook_args.object)
|
|
finally:
|
|
# expected and hook_args contain an exception: break reference cycle
|
|
expected = None
|
|
hook_args = None
|
|
|
|
def test_custom_unraisablehook_fail(self):
|
|
_testcapi = import_helper.import_module('_testcapi')
|
|
from _testcapi import err_writeunraisable
|
|
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):
|
|
err_writeunraisable(ValueError(42), "custom hook fail")
|
|
|
|
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
|
|
_testinternalcapi = import_helper.import_module("_testinternalcapi")
|
|
self.gc_headsize = _testinternalcapi.SIZEOF_PYGC_HEAD
|
|
self.managed_pre_header_size = _testinternalcapi.SIZEOF_MANAGED_PRE_HEADER
|
|
|
|
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 + self.managed_pre_header_size)
|
|
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)
|
|
check(False, 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 (string key)
|
|
check({"a": 1}, size('nQ2P') + calcsize(DICT_KEY_STRUCT_FORMAT) + 8 + (8*2//3)*calcsize('2P'))
|
|
longdict = {str(i): i for i in range(8)}
|
|
check(longdict, size('nQ2P') + calcsize(DICT_KEY_STRUCT_FORMAT) + 16 + (16*2//3)*calcsize('2P'))
|
|
# dict (non-string key)
|
|
check({1: 1}, size('nQ2P') + calcsize(DICT_KEY_STRUCT_FORMAT) + 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(DICT_KEY_STRUCT_FORMAT) + 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('6Pb'))
|
|
# UnicodeEncodeError
|
|
check(UnicodeEncodeError("", "", 0, 0, ""), size('6Pb 2P2nP'))
|
|
# UnicodeDecodeError
|
|
check(UnicodeDecodeError("", b"", 0, 0, ""), size('6Pb 2P2nP'))
|
|
# UnicodeTranslateError
|
|
check(UnicodeTranslateError("", 0, 1, ""), size('6Pb 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('n4P'))
|
|
# 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
|
|
def func():
|
|
return sys._getframe()
|
|
x = func()
|
|
check(x, size('3Pi3c7P2ic??2P'))
|
|
# function
|
|
def func(): pass
|
|
check(func, size('15Pi'))
|
|
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('PP4P4c7P2ic??2P'))
|
|
# iterator
|
|
check(iter('abc'), size('lP'))
|
|
# callable-iterator
|
|
import re
|
|
check(re.finditer('',''), size('2P'))
|
|
# list
|
|
check(list([]), vsize('Pn'))
|
|
check(list([1]), vsize('Pn') + 2*self.P)
|
|
check(list([1, 2]), vsize('Pn') + 2*self.P)
|
|
check(list([1, 2, 3]), vsize('Pn') + 4*self.P)
|
|
# sortwrapper (list)
|
|
# XXX
|
|
# cmpwrapper (list)
|
|
# XXX
|
|
# listiterator (list)
|
|
check(iter([]), size('lP'))
|
|
# listreverseiterator (list)
|
|
check(reversed([]), size('nP'))
|
|
# int
|
|
check(0, vsize('') + self.longdigit)
|
|
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
|
|
check(_datetime.datetime_CAPI, size('6P'))
|
|
# rangeiterator
|
|
check(iter(range(1)), size('3l'))
|
|
check(iter(range(2**65)), size('3P'))
|
|
# 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 = 'P2nPI13Pl4Pn9Pn12PIPc'
|
|
s = vsize(fmt)
|
|
check(int, s)
|
|
# class
|
|
s = vsize(fmt + # PyTypeObject
|
|
'4P' # PyAsyncMethods
|
|
'36P' # PyNumberMethods
|
|
'3P' # PyMappingMethods
|
|
'10P' # PySequenceMethods
|
|
'2P' # PyBufferProcs
|
|
'6P'
|
|
'1PIP' # Specializer cache
|
|
)
|
|
class newstyleclass(object): pass
|
|
# Separate block for PyDictKeysObject with 8 keys and 5 entries
|
|
check(newstyleclass, s + calcsize(DICT_KEY_STRUCT_FORMAT) + 64 + 42*calcsize("2P"))
|
|
# dict with shared keys
|
|
[newstyleclass() for _ in range(100)]
|
|
check(newstyleclass().__dict__, size('nQ2P') + 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(DICT_KEY_STRUCT_FORMAT) + 64 + 42*calcsize("2P"))
|
|
# dict with shared keys
|
|
check(newstyleclass().__dict__, size('nQ2P') + 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]
|
|
# also update field definitions in test_unicode.test_raiseMemError
|
|
asciifields = "nnb"
|
|
compactfields = asciifields + "nP"
|
|
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
|
|
if support.Py_GIL_DISABLED:
|
|
expected = size('2Pn4P')
|
|
else:
|
|
expected = size('2Pn3P')
|
|
check(weakref.ref(int), expected)
|
|
# weakproxy
|
|
# XXX
|
|
# weakcallableproxy
|
|
check(weakref.proxy(int), expected)
|
|
|
|
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 as e:
|
|
tb = e.__traceback__
|
|
# 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()
|