Sindbad~EG File Manager
from contextlib import contextmanager
import linecache
import os
import importlib
from io import StringIO
import re
import sys
import textwrap
import types
import unittest
from test import support
from test.support import import_helper
from test.support import os_helper
from test.support import warnings_helper
from test.support.script_helper import assert_python_ok, assert_python_failure
from test.test_warnings.data import package_helper
from test.test_warnings.data import stacklevel as warning_tests
import warnings as original_warnings
py_warnings = import_helper.import_fresh_module('warnings',
blocked=['_warnings'])
c_warnings = import_helper.import_fresh_module('warnings',
fresh=['_warnings'])
@contextmanager
def warnings_state(module):
"""Use a specific warnings implementation in warning_tests."""
global __warningregistry__
for to_clear in (sys, warning_tests):
try:
to_clear.__warningregistry__.clear()
except AttributeError:
pass
try:
__warningregistry__.clear()
except NameError:
pass
original_warnings = warning_tests.warnings
original_filters = module.filters
try:
module.filters = original_filters[:]
module.simplefilter("once")
warning_tests.warnings = module
yield
finally:
warning_tests.warnings = original_warnings
module.filters = original_filters
class TestWarning(Warning):
pass
class BaseTest:
"""Basic bookkeeping required for testing."""
def setUp(self):
self.old_unittest_module = unittest.case.warnings
# The __warningregistry__ needs to be in a pristine state for tests
# to work properly.
if '__warningregistry__' in globals():
del globals()['__warningregistry__']
if hasattr(warning_tests, '__warningregistry__'):
del warning_tests.__warningregistry__
if hasattr(sys, '__warningregistry__'):
del sys.__warningregistry__
# The 'warnings' module must be explicitly set so that the proper
# interaction between _warnings and 'warnings' can be controlled.
sys.modules['warnings'] = self.module
# Ensure that unittest.TestCase.assertWarns() uses the same warnings
# module than warnings.catch_warnings(). Otherwise,
# warnings.catch_warnings() will be unable to remove the added filter.
unittest.case.warnings = self.module
super(BaseTest, self).setUp()
def tearDown(self):
sys.modules['warnings'] = original_warnings
unittest.case.warnings = self.old_unittest_module
super(BaseTest, self).tearDown()
class PublicAPITests(BaseTest):
"""Ensures that the correct values are exposed in the
public API.
"""
def test_module_all_attribute(self):
self.assertTrue(hasattr(self.module, '__all__'))
target_api = ["warn", "warn_explicit", "showwarning",
"formatwarning", "filterwarnings", "simplefilter",
"resetwarnings", "catch_warnings"]
self.assertSetEqual(set(self.module.__all__),
set(target_api))
class CPublicAPITests(PublicAPITests, unittest.TestCase):
module = c_warnings
class PyPublicAPITests(PublicAPITests, unittest.TestCase):
module = py_warnings
class FilterTests(BaseTest):
"""Testing the filtering functionality."""
def test_error(self):
with original_warnings.catch_warnings(module=self.module) as w:
self.module.resetwarnings()
self.module.filterwarnings("error", category=UserWarning)
self.assertRaises(UserWarning, self.module.warn,
"FilterTests.test_error")
def test_error_after_default(self):
with original_warnings.catch_warnings(module=self.module) as w:
self.module.resetwarnings()
message = "FilterTests.test_ignore_after_default"
def f():
self.module.warn(message, UserWarning)
with support.captured_stderr() as stderr:
f()
stderr = stderr.getvalue()
self.assertIn("UserWarning: FilterTests.test_ignore_after_default",
stderr)
self.assertIn("self.module.warn(message, UserWarning)",
stderr)
self.module.filterwarnings("error", category=UserWarning)
self.assertRaises(UserWarning, f)
def test_ignore(self):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.resetwarnings()
self.module.filterwarnings("ignore", category=UserWarning)
self.module.warn("FilterTests.test_ignore", UserWarning)
self.assertEqual(len(w), 0)
self.assertEqual(list(__warningregistry__), ['version'])
def test_ignore_after_default(self):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.resetwarnings()
message = "FilterTests.test_ignore_after_default"
def f():
self.module.warn(message, UserWarning)
f()
self.module.filterwarnings("ignore", category=UserWarning)
f()
f()
self.assertEqual(len(w), 1)
def test_always(self):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.resetwarnings()
self.module.filterwarnings("always", category=UserWarning)
message = "FilterTests.test_always"
def f():
self.module.warn(message, UserWarning)
f()
self.assertEqual(len(w), 1)
self.assertEqual(w[-1].message.args[0], message)
f()
self.assertEqual(len(w), 2)
self.assertEqual(w[-1].message.args[0], message)
def test_always_after_default(self):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.resetwarnings()
message = "FilterTests.test_always_after_ignore"
def f():
self.module.warn(message, UserWarning)
f()
self.assertEqual(len(w), 1)
self.assertEqual(w[-1].message.args[0], message)
f()
self.assertEqual(len(w), 1)
self.module.filterwarnings("always", category=UserWarning)
f()
self.assertEqual(len(w), 2)
self.assertEqual(w[-1].message.args[0], message)
f()
self.assertEqual(len(w), 3)
self.assertEqual(w[-1].message.args[0], message)
def test_default(self):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.resetwarnings()
self.module.filterwarnings("default", category=UserWarning)
message = UserWarning("FilterTests.test_default")
for x in range(2):
self.module.warn(message, UserWarning)
if x == 0:
self.assertEqual(w[-1].message, message)
del w[:]
elif x == 1:
self.assertEqual(len(w), 0)
else:
raise ValueError("loop variant unhandled")
def test_module(self):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.resetwarnings()
self.module.filterwarnings("module", category=UserWarning)
message = UserWarning("FilterTests.test_module")
self.module.warn(message, UserWarning)
self.assertEqual(w[-1].message, message)
del w[:]
self.module.warn(message, UserWarning)
self.assertEqual(len(w), 0)
def test_once(self):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.resetwarnings()
self.module.filterwarnings("once", category=UserWarning)
message = UserWarning("FilterTests.test_once")
self.module.warn_explicit(message, UserWarning, "__init__.py",
42)
self.assertEqual(w[-1].message, message)
del w[:]
self.module.warn_explicit(message, UserWarning, "__init__.py",
13)
self.assertEqual(len(w), 0)
self.module.warn_explicit(message, UserWarning, "test_warnings2.py",
42)
self.assertEqual(len(w), 0)
def test_module_globals(self):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.simplefilter("always", UserWarning)
# bpo-33509: module_globals=None must not crash
self.module.warn_explicit('msg', UserWarning, "filename", 42,
module_globals=None)
self.assertEqual(len(w), 1)
# Invalid module_globals type
with self.assertRaises(TypeError):
self.module.warn_explicit('msg', UserWarning, "filename", 42,
module_globals=True)
self.assertEqual(len(w), 1)
# Empty module_globals
self.module.warn_explicit('msg', UserWarning, "filename", 42,
module_globals={})
self.assertEqual(len(w), 2)
def test_inheritance(self):
with original_warnings.catch_warnings(module=self.module) as w:
self.module.resetwarnings()
self.module.filterwarnings("error", category=Warning)
self.assertRaises(UserWarning, self.module.warn,
"FilterTests.test_inheritance", UserWarning)
def test_ordering(self):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.resetwarnings()
self.module.filterwarnings("ignore", category=UserWarning)
self.module.filterwarnings("error", category=UserWarning,
append=True)
del w[:]
try:
self.module.warn("FilterTests.test_ordering", UserWarning)
except UserWarning:
self.fail("order handling for actions failed")
self.assertEqual(len(w), 0)
def test_filterwarnings(self):
# Test filterwarnings().
# Implicitly also tests resetwarnings().
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.filterwarnings("error", "", Warning, "", 0)
self.assertRaises(UserWarning, self.module.warn, 'convert to error')
self.module.resetwarnings()
text = 'handle normally'
self.module.warn(text)
self.assertEqual(str(w[-1].message), text)
self.assertIs(w[-1].category, UserWarning)
self.module.filterwarnings("ignore", "", Warning, "", 0)
text = 'filtered out'
self.module.warn(text)
self.assertNotEqual(str(w[-1].message), text)
self.module.resetwarnings()
self.module.filterwarnings("error", "hex*", Warning, "", 0)
self.assertRaises(UserWarning, self.module.warn, 'hex/oct')
text = 'nonmatching text'
self.module.warn(text)
self.assertEqual(str(w[-1].message), text)
self.assertIs(w[-1].category, UserWarning)
def test_message_matching(self):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.simplefilter("ignore", UserWarning)
self.module.filterwarnings("error", "match", UserWarning)
self.assertRaises(UserWarning, self.module.warn, "match")
self.assertRaises(UserWarning, self.module.warn, "match prefix")
self.module.warn("suffix match")
self.assertEqual(w, [])
self.module.warn("something completely different")
self.assertEqual(w, [])
def test_mutate_filter_list(self):
class X:
def match(self, a):
L[:] = []
L = [("default",X(),UserWarning,X(),0) for i in range(2)]
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.filters = L
self.module.warn_explicit(UserWarning("b"), None, "f.py", 42)
self.assertEqual(str(w[-1].message), "b")
def test_filterwarnings_duplicate_filters(self):
with original_warnings.catch_warnings(module=self.module):
self.module.resetwarnings()
self.module.filterwarnings("error", category=UserWarning)
self.assertEqual(len(self.module.filters), 1)
self.module.filterwarnings("ignore", category=UserWarning)
self.module.filterwarnings("error", category=UserWarning)
self.assertEqual(
len(self.module.filters), 2,
"filterwarnings inserted duplicate filter"
)
self.assertEqual(
self.module.filters[0][0], "error",
"filterwarnings did not promote filter to "
"the beginning of list"
)
def test_simplefilter_duplicate_filters(self):
with original_warnings.catch_warnings(module=self.module):
self.module.resetwarnings()
self.module.simplefilter("error", category=UserWarning)
self.assertEqual(len(self.module.filters), 1)
self.module.simplefilter("ignore", category=UserWarning)
self.module.simplefilter("error", category=UserWarning)
self.assertEqual(
len(self.module.filters), 2,
"simplefilter inserted duplicate filter"
)
self.assertEqual(
self.module.filters[0][0], "error",
"simplefilter did not promote filter to the beginning of list"
)
def test_append_duplicate(self):
with original_warnings.catch_warnings(module=self.module,
record=True) as w:
self.module.resetwarnings()
self.module.simplefilter("ignore")
self.module.simplefilter("error", append=True)
self.module.simplefilter("ignore", append=True)
self.module.warn("test_append_duplicate", category=UserWarning)
self.assertEqual(len(self.module.filters), 2,
"simplefilter inserted duplicate filter"
)
self.assertEqual(len(w), 0,
"appended duplicate changed order of filters"
)
def test_catchwarnings_with_simplefilter_ignore(self):
with original_warnings.catch_warnings(module=self.module):
self.module.resetwarnings()
self.module.simplefilter("error")
with self.module.catch_warnings(
module=self.module, action="ignore"
):
self.module.warn("This will be ignored")
def test_catchwarnings_with_simplefilter_error(self):
with original_warnings.catch_warnings(module=self.module):
self.module.resetwarnings()
with self.module.catch_warnings(
module=self.module, action="error", category=FutureWarning
):
with support.captured_stderr() as stderr:
error_msg = "Other types of warnings are not errors"
self.module.warn(error_msg)
self.assertRaises(FutureWarning,
self.module.warn, FutureWarning("msg"))
stderr = stderr.getvalue()
self.assertIn(error_msg, stderr)
class CFilterTests(FilterTests, unittest.TestCase):
module = c_warnings
class PyFilterTests(FilterTests, unittest.TestCase):
module = py_warnings
class WarnTests(BaseTest):
"""Test warnings.warn() and warnings.warn_explicit()."""
def test_message(self):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.simplefilter("once")
for i in range(4):
text = 'multi %d' %i # Different text on each call.
self.module.warn(text)
self.assertEqual(str(w[-1].message), text)
self.assertIs(w[-1].category, UserWarning)
# Issue 3639
def test_warn_nonstandard_types(self):
# warn() should handle non-standard types without issue.
for ob in (Warning, None, 42):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.simplefilter("once")
self.module.warn(ob)
# Don't directly compare objects since
# ``Warning() != Warning()``.
self.assertEqual(str(w[-1].message), str(UserWarning(ob)))
def test_filename(self):
with warnings_state(self.module):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
warning_tests.inner("spam1")
self.assertEqual(os.path.basename(w[-1].filename),
"stacklevel.py")
warning_tests.outer("spam2")
self.assertEqual(os.path.basename(w[-1].filename),
"stacklevel.py")
def test_stacklevel(self):
# Test stacklevel argument
# make sure all messages are different, so the warning won't be skipped
with warnings_state(self.module):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
warning_tests.inner("spam3", stacklevel=1)
self.assertEqual(os.path.basename(w[-1].filename),
"stacklevel.py")
warning_tests.outer("spam4", stacklevel=1)
self.assertEqual(os.path.basename(w[-1].filename),
"stacklevel.py")
warning_tests.inner("spam5", stacklevel=2)
self.assertEqual(os.path.basename(w[-1].filename),
"__init__.py")
warning_tests.outer("spam6", stacklevel=2)
self.assertEqual(os.path.basename(w[-1].filename),
"stacklevel.py")
warning_tests.outer("spam6.5", stacklevel=3)
self.assertEqual(os.path.basename(w[-1].filename),
"__init__.py")
warning_tests.inner("spam7", stacklevel=9999)
self.assertEqual(os.path.basename(w[-1].filename),
"sys")
def test_stacklevel_import(self):
# Issue #24305: With stacklevel=2, module-level warnings should work.
import_helper.unload('test.test_warnings.data.import_warning')
with warnings_state(self.module):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.simplefilter('always')
import test.test_warnings.data.import_warning
self.assertEqual(len(w), 1)
self.assertEqual(w[0].filename, __file__)
def test_skip_file_prefixes(self):
with warnings_state(self.module):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.simplefilter('always')
# Warning never attributed to the data/ package.
package_helper.inner_api(
"inner_api", stacklevel=2,
warnings_module=warning_tests.warnings)
self.assertEqual(w[-1].filename, __file__)
warning_tests.package("package api", stacklevel=2)
self.assertEqual(w[-1].filename, __file__)
self.assertEqual(w[-2].filename, w[-1].filename)
# Low stacklevels are overridden to 2 behavior.
warning_tests.package("package api 1", stacklevel=1)
self.assertEqual(w[-1].filename, __file__)
warning_tests.package("package api 0", stacklevel=0)
self.assertEqual(w[-1].filename, __file__)
warning_tests.package("package api -99", stacklevel=-99)
self.assertEqual(w[-1].filename, __file__)
# The stacklevel still goes up out of the package.
warning_tests.package("prefix02", stacklevel=3)
self.assertIn("unittest", w[-1].filename)
def test_skip_file_prefixes_type_errors(self):
with warnings_state(self.module):
warn = warning_tests.warnings.warn
with self.assertRaises(TypeError):
warn("msg", skip_file_prefixes=[])
with self.assertRaises(TypeError):
warn("msg", skip_file_prefixes=(b"bytes",))
with self.assertRaises(TypeError):
warn("msg", skip_file_prefixes="a sequence of strs")
def test_exec_filename(self):
filename = "<warnings-test>"
codeobj = compile(("import warnings\n"
"warnings.warn('hello', UserWarning)"),
filename, "exec")
with original_warnings.catch_warnings(record=True) as w:
self.module.simplefilter("always", category=UserWarning)
exec(codeobj)
self.assertEqual(w[0].filename, filename)
def test_warn_explicit_non_ascii_filename(self):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.resetwarnings()
self.module.filterwarnings("always", category=UserWarning)
filenames = ["nonascii\xe9\u20ac"]
if not support.is_emscripten:
# JavaScript does not like surrogates.
# Invalid UTF-8 leading byte 0x80 encountered when
# deserializing a UTF-8 string in wasm memory to a JS
# string!
filenames.append("surrogate\udc80")
for filename in filenames:
try:
os.fsencode(filename)
except UnicodeEncodeError:
continue
self.module.warn_explicit("text", UserWarning, filename, 1)
self.assertEqual(w[-1].filename, filename)
def test_warn_explicit_type_errors(self):
# warn_explicit() should error out gracefully if it is given objects
# of the wrong types.
# lineno is expected to be an integer.
self.assertRaises(TypeError, self.module.warn_explicit,
None, UserWarning, None, None)
# Either 'message' needs to be an instance of Warning or 'category'
# needs to be a subclass.
self.assertRaises(TypeError, self.module.warn_explicit,
None, None, None, 1)
# 'registry' must be a dict or None.
self.assertRaises((TypeError, AttributeError),
self.module.warn_explicit,
None, Warning, None, 1, registry=42)
def test_bad_str(self):
# issue 6415
# Warnings instance with a bad format string for __str__ should not
# trigger a bus error.
class BadStrWarning(Warning):
"""Warning with a bad format string for __str__."""
def __str__(self):
return ("A bad formatted string %(err)" %
{"err" : "there is no %(err)s"})
with self.assertRaises(ValueError):
self.module.warn(BadStrWarning())
def test_warning_classes(self):
class MyWarningClass(Warning):
pass
class NonWarningSubclass:
pass
# passing a non-subclass of Warning should raise a TypeError
with self.assertRaises(TypeError) as cm:
self.module.warn('bad warning category', '')
self.assertIn('category must be a Warning subclass, not ',
str(cm.exception))
with self.assertRaises(TypeError) as cm:
self.module.warn('bad warning category', NonWarningSubclass)
self.assertIn('category must be a Warning subclass, not ',
str(cm.exception))
# check that warning instances also raise a TypeError
with self.assertRaises(TypeError) as cm:
self.module.warn('bad warning category', MyWarningClass())
self.assertIn('category must be a Warning subclass, not ',
str(cm.exception))
with original_warnings.catch_warnings(module=self.module):
self.module.resetwarnings()
self.module.filterwarnings('default')
with self.assertWarns(MyWarningClass) as cm:
self.module.warn('good warning category', MyWarningClass)
self.assertEqual('good warning category', str(cm.warning))
with self.assertWarns(UserWarning) as cm:
self.module.warn('good warning category', None)
self.assertEqual('good warning category', str(cm.warning))
with self.assertWarns(MyWarningClass) as cm:
self.module.warn('good warning category', MyWarningClass)
self.assertIsInstance(cm.warning, Warning)
def check_module_globals(self, module_globals):
with original_warnings.catch_warnings(module=self.module, record=True) as w:
self.module.filterwarnings('default')
self.module.warn_explicit(
'eggs', UserWarning, 'bar', 1,
module_globals=module_globals)
self.assertEqual(len(w), 1)
self.assertEqual(w[0].category, UserWarning)
self.assertEqual(str(w[0].message), 'eggs')
def check_module_globals_error(self, module_globals, errmsg, errtype=ValueError):
if self.module is py_warnings:
self.check_module_globals(module_globals)
return
with original_warnings.catch_warnings(module=self.module, record=True) as w:
self.module.filterwarnings('always')
with self.assertRaisesRegex(errtype, re.escape(errmsg)):
self.module.warn_explicit(
'eggs', UserWarning, 'bar', 1,
module_globals=module_globals)
self.assertEqual(len(w), 0)
def check_module_globals_deprecated(self, module_globals, msg):
if self.module is py_warnings:
self.check_module_globals(module_globals)
return
with original_warnings.catch_warnings(module=self.module, record=True) as w:
self.module.filterwarnings('always')
self.module.warn_explicit(
'eggs', UserWarning, 'bar', 1,
module_globals=module_globals)
self.assertEqual(len(w), 2)
self.assertEqual(w[0].category, DeprecationWarning)
self.assertEqual(str(w[0].message), msg)
self.assertEqual(w[1].category, UserWarning)
self.assertEqual(str(w[1].message), 'eggs')
def test_gh86298_no_loader_and_no_spec(self):
self.check_module_globals({'__name__': 'bar'})
def test_gh86298_loader_is_none_and_no_spec(self):
self.check_module_globals({'__name__': 'bar', '__loader__': None})
def test_gh86298_no_loader_and_spec_is_none(self):
self.check_module_globals_error(
{'__name__': 'bar', '__spec__': None},
'Module globals is missing a __spec__.loader')
def test_gh86298_loader_is_none_and_spec_is_none(self):
self.check_module_globals_error(
{'__name__': 'bar', '__loader__': None, '__spec__': None},
'Module globals is missing a __spec__.loader')
def test_gh86298_loader_is_none_and_spec_loader_is_none(self):
self.check_module_globals_error(
{'__name__': 'bar', '__loader__': None,
'__spec__': types.SimpleNamespace(loader=None)},
'Module globals is missing a __spec__.loader')
def test_gh86298_no_spec(self):
self.check_module_globals_deprecated(
{'__name__': 'bar', '__loader__': object()},
'Module globals is missing a __spec__.loader')
def test_gh86298_spec_is_none(self):
self.check_module_globals_deprecated(
{'__name__': 'bar', '__loader__': object(), '__spec__': None},
'Module globals is missing a __spec__.loader')
def test_gh86298_no_spec_loader(self):
self.check_module_globals_deprecated(
{'__name__': 'bar', '__loader__': object(),
'__spec__': types.SimpleNamespace()},
'Module globals is missing a __spec__.loader')
def test_gh86298_loader_and_spec_loader_disagree(self):
self.check_module_globals_deprecated(
{'__name__': 'bar', '__loader__': object(),
'__spec__': types.SimpleNamespace(loader=object())},
'Module globals; __loader__ != __spec__.loader')
def test_gh86298_no_loader_and_no_spec_loader(self):
self.check_module_globals_error(
{'__name__': 'bar', '__spec__': types.SimpleNamespace()},
'Module globals is missing a __spec__.loader', AttributeError)
def test_gh86298_no_loader_with_spec_loader_okay(self):
self.check_module_globals(
{'__name__': 'bar',
'__spec__': types.SimpleNamespace(loader=object())})
class CWarnTests(WarnTests, unittest.TestCase):
module = c_warnings
# As an early adopter, we sanity check the
# test.import_helper.import_fresh_module utility function
def test_accelerated(self):
self.assertIsNot(original_warnings, self.module)
self.assertFalse(hasattr(self.module.warn, '__code__'))
class PyWarnTests(WarnTests, unittest.TestCase):
module = py_warnings
# As an early adopter, we sanity check the
# test.import_helper.import_fresh_module utility function
def test_pure_python(self):
self.assertIsNot(original_warnings, self.module)
self.assertTrue(hasattr(self.module.warn, '__code__'))
class WCmdLineTests(BaseTest):
def test_improper_input(self):
# Uses the private _setoption() function to test the parsing
# of command-line warning arguments
with original_warnings.catch_warnings(module=self.module):
self.assertRaises(self.module._OptionError,
self.module._setoption, '1:2:3:4:5:6')
self.assertRaises(self.module._OptionError,
self.module._setoption, 'bogus::Warning')
self.assertRaises(self.module._OptionError,
self.module._setoption, 'ignore:2::4:-5')
with self.assertRaises(self.module._OptionError):
self.module._setoption('ignore::123')
with self.assertRaises(self.module._OptionError):
self.module._setoption('ignore::123abc')
with self.assertRaises(self.module._OptionError):
self.module._setoption('ignore::===')
with self.assertRaisesRegex(self.module._OptionError, 'Wärning'):
self.module._setoption('ignore::Wärning')
self.module._setoption('error::Warning::0')
self.assertRaises(UserWarning, self.module.warn, 'convert to error')
def test_import_from_module(self):
with original_warnings.catch_warnings(module=self.module):
self.module._setoption('ignore::Warning')
with self.assertRaises(self.module._OptionError):
self.module._setoption('ignore::TestWarning')
with self.assertRaises(self.module._OptionError):
self.module._setoption('ignore::test.test_warnings.bogus')
self.module._setoption('error::test.test_warnings.TestWarning')
with self.assertRaises(TestWarning):
self.module.warn('test warning', TestWarning)
class CWCmdLineTests(WCmdLineTests, unittest.TestCase):
module = c_warnings
class PyWCmdLineTests(WCmdLineTests, unittest.TestCase):
module = py_warnings
def test_improper_option(self):
# Same as above, but check that the message is printed out when
# the interpreter is executed. This also checks that options are
# actually parsed at all.
rc, out, err = assert_python_ok("-Wxxx", "-c", "pass")
self.assertIn(b"Invalid -W option ignored: invalid action: 'xxx'", err)
def test_warnings_bootstrap(self):
# Check that the warnings module does get loaded when -W<some option>
# is used (see issue #10372 for an example of silent bootstrap failure).
rc, out, err = assert_python_ok("-Wi", "-c",
"import sys; sys.modules['warnings'].warn('foo', RuntimeWarning)")
# '-Wi' was observed
self.assertFalse(out.strip())
self.assertNotIn(b'RuntimeWarning', err)
class _WarningsTests(BaseTest, unittest.TestCase):
"""Tests specific to the _warnings module."""
module = c_warnings
def test_filter(self):
# Everything should function even if 'filters' is not in warnings.
with original_warnings.catch_warnings(module=self.module) as w:
self.module.filterwarnings("error", "", Warning, "", 0)
self.assertRaises(UserWarning, self.module.warn,
'convert to error')
del self.module.filters
self.assertRaises(UserWarning, self.module.warn,
'convert to error')
def test_onceregistry(self):
# Replacing or removing the onceregistry should be okay.
global __warningregistry__
message = UserWarning('onceregistry test')
try:
original_registry = self.module.onceregistry
__warningregistry__ = {}
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.resetwarnings()
self.module.filterwarnings("once", category=UserWarning)
self.module.warn_explicit(message, UserWarning, "file", 42)
self.assertEqual(w[-1].message, message)
del w[:]
self.module.warn_explicit(message, UserWarning, "file", 42)
self.assertEqual(len(w), 0)
# Test the resetting of onceregistry.
self.module.onceregistry = {}
__warningregistry__ = {}
self.module.warn('onceregistry test')
self.assertEqual(w[-1].message.args, message.args)
# Removal of onceregistry is okay.
del w[:]
del self.module.onceregistry
__warningregistry__ = {}
self.module.warn_explicit(message, UserWarning, "file", 42)
self.assertEqual(len(w), 0)
finally:
self.module.onceregistry = original_registry
def test_default_action(self):
# Replacing or removing defaultaction should be okay.
message = UserWarning("defaultaction test")
original = self.module.defaultaction
try:
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
self.module.resetwarnings()
registry = {}
self.module.warn_explicit(message, UserWarning, "<test>", 42,
registry=registry)
self.assertEqual(w[-1].message, message)
self.assertEqual(len(w), 1)
# One actual registry key plus the "version" key
self.assertEqual(len(registry), 2)
self.assertIn("version", registry)
del w[:]
# Test removal.
del self.module.defaultaction
__warningregistry__ = {}
registry = {}
self.module.warn_explicit(message, UserWarning, "<test>", 43,
registry=registry)
self.assertEqual(w[-1].message, message)
self.assertEqual(len(w), 1)
self.assertEqual(len(registry), 2)
del w[:]
# Test setting.
self.module.defaultaction = "ignore"
__warningregistry__ = {}
registry = {}
self.module.warn_explicit(message, UserWarning, "<test>", 44,
registry=registry)
self.assertEqual(len(w), 0)
finally:
self.module.defaultaction = original
def test_showwarning_missing(self):
# Test that showwarning() missing is okay.
text = 'del showwarning test'
with original_warnings.catch_warnings(module=self.module):
self.module.filterwarnings("always", category=UserWarning)
del self.module.showwarning
with support.captured_output('stderr') as stream:
self.module.warn(text)
result = stream.getvalue()
self.assertIn(text, result)
def test_showwarnmsg_missing(self):
# Test that _showwarnmsg() missing is okay.
text = 'del _showwarnmsg test'
with original_warnings.catch_warnings(module=self.module):
self.module.filterwarnings("always", category=UserWarning)
show = self.module._showwarnmsg
try:
del self.module._showwarnmsg
with support.captured_output('stderr') as stream:
self.module.warn(text)
result = stream.getvalue()
finally:
self.module._showwarnmsg = show
self.assertIn(text, result)
def test_showwarning_not_callable(self):
with original_warnings.catch_warnings(module=self.module):
self.module.filterwarnings("always", category=UserWarning)
self.module.showwarning = print
with support.captured_output('stdout'):
self.module.warn('Warning!')
self.module.showwarning = 23
self.assertRaises(TypeError, self.module.warn, "Warning!")
def test_show_warning_output(self):
# With showwarning() missing, make sure that output is okay.
text = 'test show_warning'
with original_warnings.catch_warnings(module=self.module):
self.module.filterwarnings("always", category=UserWarning)
del self.module.showwarning
with support.captured_output('stderr') as stream:
warning_tests.inner(text)
result = stream.getvalue()
self.assertEqual(result.count('\n'), 2,
"Too many newlines in %r" % result)
first_line, second_line = result.split('\n', 1)
expected_file = os.path.splitext(warning_tests.__file__)[0] + '.py'
first_line_parts = first_line.rsplit(':', 3)
path, line, warning_class, message = first_line_parts
line = int(line)
self.assertEqual(expected_file, path)
self.assertEqual(warning_class, ' ' + UserWarning.__name__)
self.assertEqual(message, ' ' + text)
expected_line = ' ' + linecache.getline(path, line).strip() + '\n'
assert expected_line
self.assertEqual(second_line, expected_line)
def test_filename_none(self):
# issue #12467: race condition if a warning is emitted at shutdown
globals_dict = globals()
oldfile = globals_dict['__file__']
try:
catch = original_warnings.catch_warnings(record=True,
module=self.module)
with catch as w:
self.module.filterwarnings("always", category=UserWarning)
globals_dict['__file__'] = None
original_warnings.warn('test', UserWarning)
self.assertTrue(len(w))
finally:
globals_dict['__file__'] = oldfile
def test_stderr_none(self):
rc, stdout, stderr = assert_python_ok("-c",
"import sys; sys.stderr = None; "
"import warnings; warnings.simplefilter('always'); "
"warnings.warn('Warning!')")
self.assertEqual(stdout, b'')
self.assertNotIn(b'Warning!', stderr)
self.assertNotIn(b'Error', stderr)
def test_issue31285(self):
# warn_explicit() should neither raise a SystemError nor cause an
# assertion failure, in case the return value of get_source() has a
# bad splitlines() method.
get_source_called = []
def get_module_globals(*, splitlines_ret_val):
class BadSource(str):
def splitlines(self):
return splitlines_ret_val
class BadLoader:
def get_source(self, fullname):
get_source_called.append(splitlines_ret_val)
return BadSource('spam')
loader = BadLoader()
spec = importlib.machinery.ModuleSpec('foobar', loader)
return {'__loader__': loader,
'__spec__': spec,
'__name__': 'foobar'}
wmod = self.module
with original_warnings.catch_warnings(module=wmod):
wmod.filterwarnings('default', category=UserWarning)
linecache.clearcache()
with support.captured_stderr() as stderr:
wmod.warn_explicit(
'foo', UserWarning, 'bar', 1,
module_globals=get_module_globals(splitlines_ret_val=42))
self.assertIn('UserWarning: foo', stderr.getvalue())
self.assertEqual(get_source_called, [42])
linecache.clearcache()
with support.swap_attr(wmod, '_showwarnmsg', None):
del wmod._showwarnmsg
with support.captured_stderr() as stderr:
wmod.warn_explicit(
'eggs', UserWarning, 'bar', 1,
module_globals=get_module_globals(splitlines_ret_val=[42]))
self.assertIn('UserWarning: eggs', stderr.getvalue())
self.assertEqual(get_source_called, [42, [42]])
linecache.clearcache()
@support.cpython_only
def test_issue31411(self):
# warn_explicit() shouldn't raise a SystemError in case
# warnings.onceregistry isn't a dictionary.
wmod = self.module
with original_warnings.catch_warnings(module=wmod):
wmod.filterwarnings('once')
with support.swap_attr(wmod, 'onceregistry', None):
with self.assertRaises(TypeError):
wmod.warn_explicit('foo', Warning, 'bar', 1, registry=None)
@support.cpython_only
def test_issue31416(self):
# warn_explicit() shouldn't cause an assertion failure in case of a
# bad warnings.filters or warnings.defaultaction.
wmod = self.module
with original_warnings.catch_warnings(module=wmod):
wmod.filters = [(None, None, Warning, None, 0)]
with self.assertRaises(TypeError):
wmod.warn_explicit('foo', Warning, 'bar', 1)
wmod.filters = []
with support.swap_attr(wmod, 'defaultaction', None), \
self.assertRaises(TypeError):
wmod.warn_explicit('foo', Warning, 'bar', 1)
@support.cpython_only
def test_issue31566(self):
# warn() shouldn't cause an assertion failure in case of a bad
# __name__ global.
with original_warnings.catch_warnings(module=self.module):
self.module.filterwarnings('error', category=UserWarning)
with support.swap_item(globals(), '__name__', b'foo'), \
support.swap_item(globals(), '__file__', None):
self.assertRaises(UserWarning, self.module.warn, 'bar')
class WarningsDisplayTests(BaseTest):
"""Test the displaying of warnings and the ability to overload functions
related to displaying warnings."""
def test_formatwarning(self):
message = "msg"
category = Warning
file_name = os.path.splitext(warning_tests.__file__)[0] + '.py'
line_num = 5
file_line = linecache.getline(file_name, line_num).strip()
format = "%s:%s: %s: %s\n %s\n"
expect = format % (file_name, line_num, category.__name__, message,
file_line)
self.assertEqual(expect, self.module.formatwarning(message,
category, file_name, line_num))
# Test the 'line' argument.
file_line += " for the win!"
expect = format % (file_name, line_num, category.__name__, message,
file_line)
self.assertEqual(expect, self.module.formatwarning(message,
category, file_name, line_num, file_line))
def test_showwarning(self):
file_name = os.path.splitext(warning_tests.__file__)[0] + '.py'
line_num = 3
expected_file_line = linecache.getline(file_name, line_num).strip()
message = 'msg'
category = Warning
file_object = StringIO()
expect = self.module.formatwarning(message, category, file_name,
line_num)
self.module.showwarning(message, category, file_name, line_num,
file_object)
self.assertEqual(file_object.getvalue(), expect)
# Test 'line' argument.
expected_file_line += "for the win!"
expect = self.module.formatwarning(message, category, file_name,
line_num, expected_file_line)
file_object = StringIO()
self.module.showwarning(message, category, file_name, line_num,
file_object, expected_file_line)
self.assertEqual(expect, file_object.getvalue())
def test_formatwarning_override(self):
# bpo-35178: Test that a custom formatwarning function gets the 'line'
# argument as a positional argument, and not only as a keyword argument
def myformatwarning(message, category, filename, lineno, text):
return f'm={message}:c={category}:f={filename}:l={lineno}:t={text}'
file_name = os.path.splitext(warning_tests.__file__)[0] + '.py'
line_num = 3
file_line = linecache.getline(file_name, line_num).strip()
message = 'msg'
category = Warning
file_object = StringIO()
expected = f'm={message}:c={category}:f={file_name}:l={line_num}' + \
f':t={file_line}'
with support.swap_attr(self.module, 'formatwarning', myformatwarning):
self.module.showwarning(message, category, file_name, line_num,
file_object, file_line)
self.assertEqual(file_object.getvalue(), expected)
class CWarningsDisplayTests(WarningsDisplayTests, unittest.TestCase):
module = c_warnings
class PyWarningsDisplayTests(WarningsDisplayTests, unittest.TestCase):
module = py_warnings
def test_tracemalloc(self):
self.addCleanup(os_helper.unlink, os_helper.TESTFN)
with open(os_helper.TESTFN, 'w', encoding="utf-8") as fp:
fp.write(textwrap.dedent("""
def func():
f = open(__file__, "rb")
# Emit ResourceWarning
f = None
func()
"""))
def run(*args):
res = assert_python_ok(*args, PYTHONIOENCODING='utf-8')
stderr = res.err.decode('utf-8', 'replace')
stderr = '\n'.join(stderr.splitlines())
# normalize newlines
stderr = re.sub('<.*>', '<...>', stderr)
return stderr
# tracemalloc disabled
filename = os.path.abspath(os_helper.TESTFN)
stderr = run('-Wd', os_helper.TESTFN)
expected = textwrap.dedent(f'''
{filename}:5: ResourceWarning: unclosed file <...>
f = None
ResourceWarning: Enable tracemalloc to get the object allocation traceback
''').strip()
self.assertEqual(stderr, expected)
# tracemalloc enabled
stderr = run('-Wd', '-X', 'tracemalloc=2', os_helper.TESTFN)
expected = textwrap.dedent(f'''
{filename}:5: ResourceWarning: unclosed file <...>
f = None
Object allocated at (most recent call last):
File "{filename}", lineno 7
func()
File "{filename}", lineno 3
f = open(__file__, "rb")
''').strip()
self.assertEqual(stderr, expected)
class CatchWarningTests(BaseTest):
"""Test catch_warnings()."""
def test_catch_warnings_restore(self):
wmod = self.module
orig_filters = wmod.filters
orig_showwarning = wmod.showwarning
# Ensure both showwarning and filters are restored when recording
with wmod.catch_warnings(module=wmod, record=True):
wmod.filters = wmod.showwarning = object()
self.assertIs(wmod.filters, orig_filters)
self.assertIs(wmod.showwarning, orig_showwarning)
# Same test, but with recording disabled
with wmod.catch_warnings(module=wmod, record=False):
wmod.filters = wmod.showwarning = object()
self.assertIs(wmod.filters, orig_filters)
self.assertIs(wmod.showwarning, orig_showwarning)
def test_catch_warnings_recording(self):
wmod = self.module
# Ensure warnings are recorded when requested
with wmod.catch_warnings(module=wmod, record=True) as w:
self.assertEqual(w, [])
self.assertIs(type(w), list)
wmod.simplefilter("always")
wmod.warn("foo")
self.assertEqual(str(w[-1].message), "foo")
wmod.warn("bar")
self.assertEqual(str(w[-1].message), "bar")
self.assertEqual(str(w[0].message), "foo")
self.assertEqual(str(w[1].message), "bar")
del w[:]
self.assertEqual(w, [])
# Ensure warnings are not recorded when not requested
orig_showwarning = wmod.showwarning
with wmod.catch_warnings(module=wmod, record=False) as w:
self.assertIsNone(w)
self.assertIs(wmod.showwarning, orig_showwarning)
def test_catch_warnings_reentry_guard(self):
wmod = self.module
# Ensure catch_warnings is protected against incorrect usage
x = wmod.catch_warnings(module=wmod, record=True)
self.assertRaises(RuntimeError, x.__exit__)
with x:
self.assertRaises(RuntimeError, x.__enter__)
# Same test, but with recording disabled
x = wmod.catch_warnings(module=wmod, record=False)
self.assertRaises(RuntimeError, x.__exit__)
with x:
self.assertRaises(RuntimeError, x.__enter__)
def test_catch_warnings_defaults(self):
wmod = self.module
orig_filters = wmod.filters
orig_showwarning = wmod.showwarning
# Ensure default behaviour is not to record warnings
with wmod.catch_warnings(module=wmod) as w:
self.assertIsNone(w)
self.assertIs(wmod.showwarning, orig_showwarning)
self.assertIsNot(wmod.filters, orig_filters)
self.assertIs(wmod.filters, orig_filters)
if wmod is sys.modules['warnings']:
# Ensure the default module is this one
with wmod.catch_warnings() as w:
self.assertIsNone(w)
self.assertIs(wmod.showwarning, orig_showwarning)
self.assertIsNot(wmod.filters, orig_filters)
self.assertIs(wmod.filters, orig_filters)
def test_record_override_showwarning_before(self):
# Issue #28835: If warnings.showwarning() was overridden, make sure
# that catch_warnings(record=True) overrides it again.
text = "This is a warning"
wmod = self.module
my_log = []
def my_logger(message, category, filename, lineno, file=None, line=None):
nonlocal my_log
my_log.append(message)
# Override warnings.showwarning() before calling catch_warnings()
with support.swap_attr(wmod, 'showwarning', my_logger):
with wmod.catch_warnings(module=wmod, record=True) as log:
self.assertIsNot(wmod.showwarning, my_logger)
wmod.simplefilter("always")
wmod.warn(text)
self.assertIs(wmod.showwarning, my_logger)
self.assertEqual(len(log), 1, log)
self.assertEqual(log[0].message.args[0], text)
self.assertEqual(my_log, [])
def test_record_override_showwarning_inside(self):
# Issue #28835: It is possible to override warnings.showwarning()
# in the catch_warnings(record=True) context manager.
text = "This is a warning"
wmod = self.module
my_log = []
def my_logger(message, category, filename, lineno, file=None, line=None):
nonlocal my_log
my_log.append(message)
with wmod.catch_warnings(module=wmod, record=True) as log:
wmod.simplefilter("always")
wmod.showwarning = my_logger
wmod.warn(text)
self.assertEqual(len(my_log), 1, my_log)
self.assertEqual(my_log[0].args[0], text)
self.assertEqual(log, [])
def test_check_warnings(self):
# Explicit tests for the test.support convenience wrapper
wmod = self.module
if wmod is not sys.modules['warnings']:
self.skipTest('module to test is not loaded warnings module')
with warnings_helper.check_warnings(quiet=False) as w:
self.assertEqual(w.warnings, [])
wmod.simplefilter("always")
wmod.warn("foo")
self.assertEqual(str(w.message), "foo")
wmod.warn("bar")
self.assertEqual(str(w.message), "bar")
self.assertEqual(str(w.warnings[0].message), "foo")
self.assertEqual(str(w.warnings[1].message), "bar")
w.reset()
self.assertEqual(w.warnings, [])
with warnings_helper.check_warnings():
# defaults to quiet=True without argument
pass
with warnings_helper.check_warnings(('foo', UserWarning)):
wmod.warn("foo")
with self.assertRaises(AssertionError):
with warnings_helper.check_warnings(('', RuntimeWarning)):
# defaults to quiet=False with argument
pass
with self.assertRaises(AssertionError):
with warnings_helper.check_warnings(('foo', RuntimeWarning)):
wmod.warn("foo")
class CCatchWarningTests(CatchWarningTests, unittest.TestCase):
module = c_warnings
class PyCatchWarningTests(CatchWarningTests, unittest.TestCase):
module = py_warnings
class EnvironmentVariableTests(BaseTest):
def test_single_warning(self):
rc, stdout, stderr = assert_python_ok("-c",
"import sys; sys.stdout.write(str(sys.warnoptions))",
PYTHONWARNINGS="ignore::DeprecationWarning",
PYTHONDEVMODE="")
self.assertEqual(stdout, b"['ignore::DeprecationWarning']")
def test_comma_separated_warnings(self):
rc, stdout, stderr = assert_python_ok("-c",
"import sys; sys.stdout.write(str(sys.warnoptions))",
PYTHONWARNINGS="ignore::DeprecationWarning,ignore::UnicodeWarning",
PYTHONDEVMODE="")
self.assertEqual(stdout,
b"['ignore::DeprecationWarning', 'ignore::UnicodeWarning']")
def test_envvar_and_command_line(self):
rc, stdout, stderr = assert_python_ok("-Wignore::UnicodeWarning", "-c",
"import sys; sys.stdout.write(str(sys.warnoptions))",
PYTHONWARNINGS="ignore::DeprecationWarning",
PYTHONDEVMODE="")
self.assertEqual(stdout,
b"['ignore::DeprecationWarning', 'ignore::UnicodeWarning']")
def test_conflicting_envvar_and_command_line(self):
rc, stdout, stderr = assert_python_failure("-Werror::DeprecationWarning", "-c",
"import sys, warnings; sys.stdout.write(str(sys.warnoptions)); "
"warnings.warn('Message', DeprecationWarning)",
PYTHONWARNINGS="default::DeprecationWarning",
PYTHONDEVMODE="")
self.assertEqual(stdout,
b"['default::DeprecationWarning', 'error::DeprecationWarning']")
self.assertEqual(stderr.splitlines(),
[b"Traceback (most recent call last):",
b" File \"<string>\", line 1, in <module>",
b"DeprecationWarning: Message"])
def test_default_filter_configuration(self):
pure_python_api = self.module is py_warnings
if support.Py_DEBUG:
expected_default_filters = []
else:
if pure_python_api:
main_module_filter = re.compile("__main__")
else:
main_module_filter = "__main__"
expected_default_filters = [
('default', None, DeprecationWarning, main_module_filter, 0),
('ignore', None, DeprecationWarning, None, 0),
('ignore', None, PendingDeprecationWarning, None, 0),
('ignore', None, ImportWarning, None, 0),
('ignore', None, ResourceWarning, None, 0),
]
expected_output = [str(f).encode() for f in expected_default_filters]
if pure_python_api:
# Disable the warnings acceleration module in the subprocess
code = "import sys; sys.modules.pop('warnings', None); sys.modules['_warnings'] = None; "
else:
code = ""
code += "import warnings; [print(f) for f in warnings.filters]"
rc, stdout, stderr = assert_python_ok("-c", code, __isolated=True)
stdout_lines = [line.strip() for line in stdout.splitlines()]
self.maxDiff = None
self.assertEqual(stdout_lines, expected_output)
@unittest.skipUnless(sys.getfilesystemencoding() != 'ascii',
'requires non-ascii filesystemencoding')
def test_nonascii(self):
PYTHONWARNINGS="ignore:DeprecationWarning" + os_helper.FS_NONASCII
rc, stdout, stderr = assert_python_ok("-c",
"import sys; sys.stdout.write(str(sys.warnoptions))",
PYTHONIOENCODING="utf-8",
PYTHONWARNINGS=PYTHONWARNINGS,
PYTHONDEVMODE="")
self.assertEqual(stdout, str([PYTHONWARNINGS]).encode())
class CEnvironmentVariableTests(EnvironmentVariableTests, unittest.TestCase):
module = c_warnings
class PyEnvironmentVariableTests(EnvironmentVariableTests, unittest.TestCase):
module = py_warnings
class _DeprecatedTest(BaseTest, unittest.TestCase):
"""Test _deprecated()."""
module = original_warnings
def test_warning(self):
version = (3, 11, 0, "final", 0)
test = [(4, 12), (4, 11), (4, 0), (3, 12)]
for remove in test:
msg = rf".*test_warnings.*{remove[0]}\.{remove[1]}"
filter = msg, DeprecationWarning
with self.subTest(remove=remove):
with warnings_helper.check_warnings(filter, quiet=False):
self.module._deprecated("test_warnings", remove=remove,
_version=version)
version = (3, 11, 0, "alpha", 0)
msg = r".*test_warnings.*3\.11"
with warnings_helper.check_warnings((msg, DeprecationWarning), quiet=False):
self.module._deprecated("test_warnings", remove=(3, 11),
_version=version)
def test_RuntimeError(self):
version = (3, 11, 0, "final", 0)
test = [(2, 0), (2, 12), (3, 10)]
for remove in test:
with self.subTest(remove=remove):
with self.assertRaises(RuntimeError):
self.module._deprecated("test_warnings", remove=remove,
_version=version)
for level in ["beta", "candidate", "final"]:
version = (3, 11, 0, level, 0)
with self.subTest(releaselevel=level):
with self.assertRaises(RuntimeError):
self.module._deprecated("test_warnings", remove=(3, 11),
_version=version)
class BootstrapTest(unittest.TestCase):
def test_issue_8766(self):
# "import encodings" emits a warning whereas the warnings is not loaded
# or not completely loaded (warnings imports indirectly encodings by
# importing linecache) yet
with os_helper.temp_cwd() as cwd, os_helper.temp_cwd('encodings'):
# encodings loaded by initfsencoding()
assert_python_ok('-c', 'pass', PYTHONPATH=cwd)
# Use -W to load warnings module at startup
assert_python_ok('-c', 'pass', '-W', 'always', PYTHONPATH=cwd)
class FinalizationTest(unittest.TestCase):
def test_finalization(self):
# Issue #19421: warnings.warn() should not crash
# during Python finalization
code = """
import warnings
warn = warnings.warn
class A:
def __del__(self):
warn("test")
a=A()
"""
rc, out, err = assert_python_ok("-c", code)
self.assertEqual(err.decode().rstrip(),
'<string>:7: UserWarning: test')
def test_late_resource_warning(self):
# Issue #21925: Emitting a ResourceWarning late during the Python
# shutdown must be logged.
expected = b"sys:1: ResourceWarning: unclosed file "
# don't import the warnings module
# (_warnings will try to import it)
code = "f = open(%a)" % __file__
rc, out, err = assert_python_ok("-Wd", "-c", code)
self.assertTrue(err.startswith(expected), ascii(err))
# import the warnings module
code = "import warnings; f = open(%a)" % __file__
rc, out, err = assert_python_ok("-Wd", "-c", code)
self.assertTrue(err.startswith(expected), ascii(err))
def setUpModule():
py_warnings.onceregistry.clear()
c_warnings.onceregistry.clear()
tearDownModule = setUpModule
if __name__ == "__main__":
unittest.main()
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