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# bpo-42260: Test _PyInterpreterState_GetConfigCopy()
# and _PyInterpreterState_SetConfig().
#
# Test run in a subprocess since set_config(get_config())
# does reset sys attributes to their state of the Python startup
# (before the site module is run).
import _testinternalcapi
import os
import sys
import unittest
from test import support
from test.support import MS_WINDOWS
MAX_HASH_SEED = 4294967295
BOOL_OPTIONS = [
'isolated',
'use_environment',
'dev_mode',
'install_signal_handlers',
'use_hash_seed',
'faulthandler',
'import_time',
'code_debug_ranges',
'show_ref_count',
'dump_refs',
'malloc_stats',
'parse_argv',
'site_import',
'warn_default_encoding',
'inspect',
'interactive',
'parser_debug',
'write_bytecode',
'quiet',
'user_site_directory',
'configure_c_stdio',
'buffered_stdio',
'use_frozen_modules',
'safe_path',
'pathconfig_warnings',
'module_search_paths_set',
'skip_source_first_line',
'_install_importlib',
'_init_main',
'_is_python_build',
]
if MS_WINDOWS:
BOOL_OPTIONS.append('legacy_windows_stdio')
class SetConfigTests(unittest.TestCase):
def setUp(self):
self.old_config = _testinternalcapi.get_config()
self.sys_copy = dict(sys.__dict__)
def tearDown(self):
_testinternalcapi.reset_path_config()
_testinternalcapi.set_config(self.old_config)
sys.__dict__.clear()
sys.__dict__.update(self.sys_copy)
def set_config(self, **kwargs):
_testinternalcapi.set_config(self.old_config | kwargs)
def check(self, **kwargs):
self.set_config(**kwargs)
for key, value in kwargs.items():
self.assertEqual(getattr(sys, key), value,
(key, value))
def test_set_invalid(self):
invalid_uint = -1
NULL = None
invalid_wstr = NULL
# PyWideStringList strings must be non-NULL
invalid_wstrlist = ["abc", NULL, "def"]
type_tests = []
value_tests = [
# enum
('_config_init', 0),
('_config_init', 4),
# unsigned long
("hash_seed", -1),
("hash_seed", MAX_HASH_SEED + 1),
]
# int (unsigned)
int_options = [
'_config_init',
'bytes_warning',
'optimization_level',
'tracemalloc',
'verbose',
]
int_options.extend(BOOL_OPTIONS)
for key in int_options:
value_tests.append((key, invalid_uint))
type_tests.append((key, "abc"))
type_tests.append((key, 2.0))
# wchar_t*
for key in (
'filesystem_encoding',
'filesystem_errors',
'stdio_encoding',
'stdio_errors',
'check_hash_pycs_mode',
'program_name',
'platlibdir',
# optional wstr:
# 'pythonpath_env'
# 'home'
# 'pycache_prefix'
# 'run_command'
# 'run_module'
# 'run_filename'
# 'executable'
# 'prefix'
# 'exec_prefix'
# 'base_executable'
# 'base_prefix'
# 'base_exec_prefix'
):
value_tests.append((key, invalid_wstr))
type_tests.append((key, b'bytes'))
type_tests.append((key, 123))
# PyWideStringList
for key in (
'orig_argv',
'argv',
'xoptions',
'warnoptions',
'module_search_paths',
):
value_tests.append((key, invalid_wstrlist))
type_tests.append((key, 123))
type_tests.append((key, "abc"))
type_tests.append((key, [123]))
type_tests.append((key, [b"bytes"]))
if MS_WINDOWS:
value_tests.append(('legacy_windows_stdio', invalid_uint))
for exc_type, tests in (
(ValueError, value_tests),
(TypeError, type_tests),
):
for key, value in tests:
config = self.old_config | {key: value}
with self.subTest(key=key, value=value, exc_type=exc_type):
with self.assertRaises(exc_type):
_testinternalcapi.set_config(config)
def test_flags(self):
bool_options = set(BOOL_OPTIONS)
for sys_attr, key, value in (
("debug", "parser_debug", 1),
("inspect", "inspect", 2),
("interactive", "interactive", 3),
("optimize", "optimization_level", 4),
("verbose", "verbose", 1),
("bytes_warning", "bytes_warning", 10),
("quiet", "quiet", 11),
("isolated", "isolated", 12),
):
with self.subTest(sys=sys_attr, key=key, value=value):
self.set_config(**{key: value, 'parse_argv': 0})
if key in bool_options:
self.assertEqual(getattr(sys.flags, sys_attr), int(bool(value)))
else:
self.assertEqual(getattr(sys.flags, sys_attr), value)
self.set_config(write_bytecode=0)
self.assertEqual(sys.flags.dont_write_bytecode, True)
self.assertEqual(sys.dont_write_bytecode, True)
self.set_config(write_bytecode=1)
self.assertEqual(sys.flags.dont_write_bytecode, False)
self.assertEqual(sys.dont_write_bytecode, False)
self.set_config(user_site_directory=0, isolated=0)
self.assertEqual(sys.flags.no_user_site, 1)
self.set_config(user_site_directory=1, isolated=0)
self.assertEqual(sys.flags.no_user_site, 0)
self.set_config(site_import=0)
self.assertEqual(sys.flags.no_site, 1)
self.set_config(site_import=1)
self.assertEqual(sys.flags.no_site, 0)
self.set_config(dev_mode=0)
self.assertEqual(sys.flags.dev_mode, False)
self.set_config(dev_mode=1)
self.assertEqual(sys.flags.dev_mode, True)
self.set_config(use_environment=0, isolated=0)
self.assertEqual(sys.flags.ignore_environment, 1)
self.set_config(use_environment=1, isolated=0)
self.assertEqual(sys.flags.ignore_environment, 0)
self.set_config(use_hash_seed=1, hash_seed=0)
self.assertEqual(sys.flags.hash_randomization, 0)
self.set_config(use_hash_seed=0, hash_seed=0)
self.assertEqual(sys.flags.hash_randomization, 1)
self.set_config(use_hash_seed=1, hash_seed=123)
self.assertEqual(sys.flags.hash_randomization, 1)
if support.Py_GIL_DISABLED:
self.set_config(enable_gil=-1)
self.assertEqual(sys.flags.gil, None)
self.set_config(enable_gil=0)
self.assertEqual(sys.flags.gil, 0)
self.set_config(enable_gil=1)
self.assertEqual(sys.flags.gil, 1)
else:
# Builds without Py_GIL_DISABLED don't have
# PyConfig.enable_gil. sys.flags.gil is always defined to 1, for
# consistency.
self.assertEqual(sys.flags.gil, 1)
def test_options(self):
self.check(warnoptions=[])
self.check(warnoptions=["default", "ignore"])
self.set_config(xoptions=[])
self.assertEqual(sys._xoptions, {})
self.set_config(xoptions=["dev", "tracemalloc=5"])
self.assertEqual(sys._xoptions, {"dev": True, "tracemalloc": "5"})
def test_pathconfig(self):
self.check(
executable='executable',
prefix="prefix",
base_prefix="base_prefix",
exec_prefix="exec_prefix",
base_exec_prefix="base_exec_prefix",
platlibdir="platlibdir")
self.set_config(base_executable="base_executable")
self.assertEqual(sys._base_executable, "base_executable")
# When base_xxx is NULL, value is copied from xxxx
self.set_config(
executable='executable',
prefix="prefix",
exec_prefix="exec_prefix",
base_executable=None,
base_prefix=None,
base_exec_prefix=None)
self.assertEqual(sys._base_executable, "executable")
self.assertEqual(sys.base_prefix, "prefix")
self.assertEqual(sys.base_exec_prefix, "exec_prefix")
def test_path(self):
self.set_config(module_search_paths_set=1,
module_search_paths=['a', 'b', 'c'])
self.assertEqual(sys.path, ['a', 'b', 'c'])
# sys.path is reset if module_search_paths_set=0
self.set_config(module_search_paths_set=0,
module_search_paths=['new_path'])
self.assertNotEqual(sys.path, ['a', 'b', 'c'])
self.assertNotEqual(sys.path, ['new_path'])
def test_argv(self):
self.set_config(parse_argv=0,
argv=['python_program', 'args'],
orig_argv=['orig', 'orig_args'])
self.assertEqual(sys.argv, ['python_program', 'args'])
self.assertEqual(sys.orig_argv, ['orig', 'orig_args'])
self.set_config(parse_argv=0,
argv=[],
orig_argv=[])
self.assertEqual(sys.argv, [''])
self.assertEqual(sys.orig_argv, [])
def test_pycache_prefix(self):
self.check(pycache_prefix=None)
self.check(pycache_prefix="pycache_prefix")
if __name__ == "__main__":
unittest.main()
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