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cpython/Lib/test/test_warnings.py

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from contextlib import contextmanager
import linecache
import os
from io import StringIO
import sys
import unittest
import subprocess
from test import support
from test.script_helper import assert_python_ok
from test import warning_tests
import warnings as original_warnings
py_warnings = support.import_fresh_module('warnings', blocked=['_warnings'])
c_warnings = support.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 BaseTest(unittest.TestCase):
"""Basic bookkeeping required for testing."""
def setUp(self):
# 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
super(BaseTest, self).setUp()
def tearDown(self):
sys.modules['warnings'] = original_warnings
super(BaseTest, self).tearDown()
class FilterTests(object):
"""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_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)
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"
self.module.warn(message, UserWarning)
self.assertTrue(message, w[-1].message)
self.module.warn(message, UserWarning)
self.assertTrue(w[-1].message, 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, "test_warnings.py",
42)
self.assertEqual(w[-1].message, message)
del w[:]
self.module.warn_explicit(message, UserWarning, "test_warnings.py",
13)
self.assertEqual(len(w), 0)
self.module.warn_explicit(message, UserWarning, "test_warnings2.py",
42)
self.assertEqual(len(w), 0)
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.assertTrue(w[-1].category is 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.assertTrue(w[-1].category is UserWarning)
class CFilterTests(BaseTest, FilterTests):
module = c_warnings
class PyFilterTests(BaseTest, FilterTests):
module = py_warnings
class WarnTests(unittest.TestCase):
"""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.assertTrue(w[-1].category is 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),
"warning_tests.py")
warning_tests.outer("spam2")
self.assertEqual(os.path.basename(w[-1].filename),
"warning_tests.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),
"warning_tests.py")
warning_tests.outer("spam4", stacklevel=1)
self.assertEqual(os.path.basename(w[-1].filename),
"warning_tests.py")
warning_tests.inner("spam5", stacklevel=2)
self.assertEqual(os.path.basename(w[-1].filename),
"test_warnings.py")
warning_tests.outer("spam6", stacklevel=2)
self.assertEqual(os.path.basename(w[-1].filename),
"warning_tests.py")
warning_tests.outer("spam6.5", stacklevel=3)
self.assertEqual(os.path.basename(w[-1].filename),
"test_warnings.py")
warning_tests.inner("spam7", stacklevel=9999)
self.assertEqual(os.path.basename(w[-1].filename),
"sys")
def test_missing_filename_not_main(self):
# If __file__ is not specified and __main__ is not the module name,
# then __file__ should be set to the module name.
filename = warning_tests.__file__
try:
del warning_tests.__file__
with warnings_state(self.module):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
warning_tests.inner("spam8", stacklevel=1)
self.assertEqual(w[-1].filename, warning_tests.__name__)
finally:
warning_tests.__file__ = filename
def test_missing_filename_main_with_argv(self):
# If __file__ is not specified and the caller is __main__ and sys.argv
# exists, then use sys.argv[0] as the file.
if not hasattr(sys, 'argv'):
return
filename = warning_tests.__file__
module_name = warning_tests.__name__
try:
del warning_tests.__file__
warning_tests.__name__ = '__main__'
with warnings_state(self.module):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
warning_tests.inner('spam9', stacklevel=1)
self.assertEqual(w[-1].filename, sys.argv[0])
finally:
warning_tests.__file__ = filename
warning_tests.__name__ = module_name
def test_missing_filename_main_without_argv(self):
# If __file__ is not specified, the caller is __main__, and sys.argv
# is not set, then '__main__' is the file name.
filename = warning_tests.__file__
module_name = warning_tests.__name__
argv = sys.argv
try:
del warning_tests.__file__
warning_tests.__name__ = '__main__'
del sys.argv
with warnings_state(self.module):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
warning_tests.inner('spam10', stacklevel=1)
self.assertEqual(w[-1].filename, '__main__')
finally:
warning_tests.__file__ = filename
warning_tests.__name__ = module_name
sys.argv = argv
def test_missing_filename_main_with_argv_empty_string(self):
# If __file__ is not specified, the caller is __main__, and sys.argv[0]
# is the empty string, then '__main__ is the file name.
# Tests issue 2743.
file_name = warning_tests.__file__
module_name = warning_tests.__name__
argv = sys.argv
try:
del warning_tests.__file__
warning_tests.__name__ = '__main__'
sys.argv = ['']
with warnings_state(self.module):
with original_warnings.catch_warnings(record=True,
module=self.module) as w:
warning_tests.inner('spam11', stacklevel=1)
self.assertEqual(w[-1].filename, '__main__')
finally:
warning_tests.__file__ = file_name
warning_tests.__name__ = module_name
sys.argv = argv
def test_warn_explicit_type_errors(self):
# warn_explicit() shoud 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())
class CWarnTests(BaseTest, WarnTests):
module = c_warnings
# As an early adopter, we sanity check the
# test.support.import_fresh_module utility function
def test_accelerated(self):
self.assertFalse(original_warnings is self.module)
self.assertFalse(hasattr(self.module.warn, '__code__'))
class PyWarnTests(BaseTest, WarnTests):
module = py_warnings
# As an early adopter, we sanity check the
# test.support.import_fresh_module utility function
def test_pure_python(self):
self.assertFalse(original_warnings is self.module)
self.assertTrue(hasattr(self.module.warn, '__code__'))
class WCmdLineTests(unittest.TestCase):
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')
self.module._setoption('error::Warning::0')
self.assertRaises(UserWarning, self.module.warn, 'convert to error')
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 CWCmdLineTests(BaseTest, WCmdLineTests):
module = c_warnings
class PyWCmdLineTests(BaseTest, WCmdLineTests):
module = py_warnings
class _WarningsTests(BaseTest):
"""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)
self.assertEqual(len(registry), 1)
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), 1)
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_showwarning_not_callable(self):
with original_warnings.catch_warnings(module=self.module):
self.module.filterwarnings("always", category=UserWarning)
old_showwarning = self.module.showwarning
self.module.showwarning = 23
try:
self.assertRaises(TypeError, self.module.warn, "Warning!")
finally:
self.module.showwarning = old_showwarning
def test_show_warning_output(self):
# With showarning() 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)
class WarningsDisplayTests(unittest.TestCase):
"""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 = 3
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())
class CWarningsDisplayTests(BaseTest, WarningsDisplayTests):
module = c_warnings
class PyWarningsDisplayTests(BaseTest, WarningsDisplayTests):
module = py_warnings
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.assertTrue(wmod.filters is orig_filters)
self.assertTrue(wmod.showwarning is orig_showwarning)
# Same test, but with recording disabled
with wmod.catch_warnings(module=wmod, record=False):
wmod.filters = wmod.showwarning = object()
self.assertTrue(wmod.filters is orig_filters)
self.assertTrue(wmod.showwarning is 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.assertTrue(type(w) is 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.assertTrue(w is None)
self.assertTrue(wmod.showwarning is 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.assertTrue(w is None)
self.assertTrue(wmod.showwarning is orig_showwarning)
self.assertTrue(wmod.filters is not orig_filters)
self.assertTrue(wmod.filters is orig_filters)
if wmod is sys.modules['warnings']:
# Ensure the default module is this one
with wmod.catch_warnings() as w:
self.assertTrue(w is None)
self.assertTrue(wmod.showwarning is orig_showwarning)
self.assertTrue(wmod.filters is not orig_filters)
self.assertTrue(wmod.filters is orig_filters)
def test_check_warnings(self):
# Explicit tests for the test.support convenience wrapper
wmod = self.module
if wmod is not sys.modules['warnings']:
return
with support.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 support.check_warnings():
# defaults to quiet=True without argument
pass
with support.check_warnings(('foo', UserWarning)):
wmod.warn("foo")
with self.assertRaises(AssertionError):
with support.check_warnings(('', RuntimeWarning)):
# defaults to quiet=False with argument
pass
with self.assertRaises(AssertionError):
with support.check_warnings(('foo', RuntimeWarning)):
wmod.warn("foo")
class CCatchWarningTests(CatchWarningTests):
module = c_warnings
class PyCatchWarningTests(CatchWarningTests):
module = py_warnings
class EnvironmentVariableTests(BaseTest):
def test_single_warning(self):
newenv = os.environ.copy()
newenv["PYTHONWARNINGS"] = "ignore::DeprecationWarning"
p = subprocess.Popen([sys.executable,
"-c", "import sys; sys.stdout.write(str(sys.warnoptions))"],
stdout=subprocess.PIPE, env=newenv)
self.assertEqual(p.communicate()[0], b"['ignore::DeprecationWarning']")
self.assertEqual(p.wait(), 0)
def test_comma_separated_warnings(self):
newenv = os.environ.copy()
newenv["PYTHONWARNINGS"] = ("ignore::DeprecationWarning,"
"ignore::UnicodeWarning")
p = subprocess.Popen([sys.executable,
"-c", "import sys; sys.stdout.write(str(sys.warnoptions))"],
stdout=subprocess.PIPE, env=newenv)
self.assertEqual(p.communicate()[0],
b"['ignore::DeprecationWarning', 'ignore::UnicodeWarning']")
self.assertEqual(p.wait(), 0)
def test_envvar_and_command_line(self):
newenv = os.environ.copy()
newenv["PYTHONWARNINGS"] = "ignore::DeprecationWarning"
p = subprocess.Popen([sys.executable, "-W" "ignore::UnicodeWarning",
"-c", "import sys; sys.stdout.write(str(sys.warnoptions))"],
stdout=subprocess.PIPE, env=newenv)
self.assertEqual(p.communicate()[0],
b"['ignore::UnicodeWarning', 'ignore::DeprecationWarning']")
self.assertEqual(p.wait(), 0)
@unittest.skipUnless(sys.getfilesystemencoding() != 'ascii',
'requires non-ascii filesystemencoding')
def test_nonascii(self):
newenv = os.environ.copy()
newenv["PYTHONWARNINGS"] = "ignore:DeprecaciónWarning"
newenv["PYTHONIOENCODING"] = "utf-8"
p = subprocess.Popen([sys.executable,
"-c", "import sys; sys.stdout.write(str(sys.warnoptions))"],
stdout=subprocess.PIPE, env=newenv)
self.assertEqual(p.communicate()[0],
"['ignore:DeprecaciónWarning']".encode('utf-8'))
self.assertEqual(p.wait(), 0)
class CEnvironmentVariableTests(EnvironmentVariableTests):
module = c_warnings
class PyEnvironmentVariableTests(EnvironmentVariableTests):
module = py_warnings
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 support.temp_cwd() as cwd, support.temp_cwd('encodings'):
env = os.environ.copy()
env['PYTHONPATH'] = cwd
# encodings loaded by initfsencoding()
retcode = subprocess.call([sys.executable, '-c', 'pass'], env=env)
self.assertEqual(retcode, 0)
# Use -W to load warnings module at startup
retcode = subprocess.call(
[sys.executable, '-c', 'pass', '-W', 'always'],
env=env)
self.assertEqual(retcode, 0)
def test_main():
py_warnings.onceregistry.clear()
c_warnings.onceregistry.clear()
support.run_unittest(
CFilterTests, PyFilterTests,
CWarnTests, PyWarnTests,
CWCmdLineTests, PyWCmdLineTests,
_WarningsTests,
CWarningsDisplayTests, PyWarningsDisplayTests,
CCatchWarningTests, PyCatchWarningTests,
CEnvironmentVariableTests, PyEnvironmentVariableTests,
BootstrapTest,
)
if __name__ == "__main__":
test_main()
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