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1213 lines
50 KiB
Python
1213 lines
50 KiB
Python
from contextlib import contextmanager
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import linecache
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import os
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from io import StringIO
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import re
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import sys
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import textwrap
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import unittest
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from test import support
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from test.support.script_helper import assert_python_ok, assert_python_failure
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from test.test_warnings.data import stacklevel as warning_tests
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import warnings as original_warnings
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py_warnings = support.import_fresh_module('warnings', blocked=['_warnings'])
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c_warnings = support.import_fresh_module('warnings', fresh=['_warnings'])
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Py_DEBUG = hasattr(sys, 'gettotalrefcount')
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@contextmanager
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def warnings_state(module):
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"""Use a specific warnings implementation in warning_tests."""
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global __warningregistry__
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for to_clear in (sys, warning_tests):
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try:
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to_clear.__warningregistry__.clear()
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except AttributeError:
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pass
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try:
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__warningregistry__.clear()
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except NameError:
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pass
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original_warnings = warning_tests.warnings
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original_filters = module.filters
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try:
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module.filters = original_filters[:]
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module.simplefilter("once")
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warning_tests.warnings = module
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yield
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finally:
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warning_tests.warnings = original_warnings
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module.filters = original_filters
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class BaseTest:
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"""Basic bookkeeping required for testing."""
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def setUp(self):
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self.old_unittest_module = unittest.case.warnings
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# The __warningregistry__ needs to be in a pristine state for tests
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# to work properly.
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if '__warningregistry__' in globals():
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del globals()['__warningregistry__']
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if hasattr(warning_tests, '__warningregistry__'):
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del warning_tests.__warningregistry__
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if hasattr(sys, '__warningregistry__'):
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del sys.__warningregistry__
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# The 'warnings' module must be explicitly set so that the proper
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# interaction between _warnings and 'warnings' can be controlled.
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sys.modules['warnings'] = self.module
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# Ensure that unittest.TestCase.assertWarns() uses the same warnings
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# module than warnings.catch_warnings(). Otherwise,
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# warnings.catch_warnings() will be unable to remove the added filter.
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unittest.case.warnings = self.module
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super(BaseTest, self).setUp()
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def tearDown(self):
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sys.modules['warnings'] = original_warnings
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unittest.case.warnings = self.old_unittest_module
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super(BaseTest, self).tearDown()
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class PublicAPITests(BaseTest):
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"""Ensures that the correct values are exposed in the
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public API.
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"""
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def test_module_all_attribute(self):
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self.assertTrue(hasattr(self.module, '__all__'))
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target_api = ["warn", "warn_explicit", "showwarning",
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"formatwarning", "filterwarnings", "simplefilter",
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"resetwarnings", "catch_warnings"]
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self.assertSetEqual(set(self.module.__all__),
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set(target_api))
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class CPublicAPITests(PublicAPITests, unittest.TestCase):
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module = c_warnings
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class PyPublicAPITests(PublicAPITests, unittest.TestCase):
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module = py_warnings
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class FilterTests(BaseTest):
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"""Testing the filtering functionality."""
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def test_error(self):
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with original_warnings.catch_warnings(module=self.module) as w:
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self.module.resetwarnings()
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self.module.filterwarnings("error", category=UserWarning)
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self.assertRaises(UserWarning, self.module.warn,
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"FilterTests.test_error")
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def test_error_after_default(self):
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with original_warnings.catch_warnings(module=self.module) as w:
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self.module.resetwarnings()
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message = "FilterTests.test_ignore_after_default"
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def f():
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self.module.warn(message, UserWarning)
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with support.captured_stderr() as stderr:
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f()
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stderr = stderr.getvalue()
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self.assertIn("UserWarning: FilterTests.test_ignore_after_default",
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stderr)
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self.assertIn("self.module.warn(message, UserWarning)",
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stderr)
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self.module.filterwarnings("error", category=UserWarning)
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self.assertRaises(UserWarning, f)
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def test_ignore(self):
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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self.module.resetwarnings()
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self.module.filterwarnings("ignore", category=UserWarning)
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self.module.warn("FilterTests.test_ignore", UserWarning)
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self.assertEqual(len(w), 0)
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self.assertEqual(list(__warningregistry__), ['version'])
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def test_ignore_after_default(self):
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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self.module.resetwarnings()
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message = "FilterTests.test_ignore_after_default"
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def f():
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self.module.warn(message, UserWarning)
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f()
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self.module.filterwarnings("ignore", category=UserWarning)
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f()
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f()
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self.assertEqual(len(w), 1)
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def test_always(self):
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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self.module.resetwarnings()
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self.module.filterwarnings("always", category=UserWarning)
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message = "FilterTests.test_always"
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self.module.warn(message, UserWarning)
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self.assertTrue(message, w[-1].message)
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self.module.warn(message, UserWarning)
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self.assertTrue(w[-1].message, message)
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def test_always_after_default(self):
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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self.module.resetwarnings()
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message = "FilterTests.test_always_after_ignore"
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def f():
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self.module.warn(message, UserWarning)
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f()
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self.assertEqual(len(w), 1)
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self.assertEqual(w[-1].message.args[0], message)
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f()
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self.assertEqual(len(w), 1)
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self.module.filterwarnings("always", category=UserWarning)
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f()
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self.assertEqual(len(w), 2)
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self.assertEqual(w[-1].message.args[0], message)
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f()
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self.assertEqual(len(w), 3)
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self.assertEqual(w[-1].message.args[0], message)
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def test_default(self):
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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self.module.resetwarnings()
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self.module.filterwarnings("default", category=UserWarning)
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message = UserWarning("FilterTests.test_default")
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for x in range(2):
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self.module.warn(message, UserWarning)
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if x == 0:
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self.assertEqual(w[-1].message, message)
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del w[:]
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elif x == 1:
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self.assertEqual(len(w), 0)
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else:
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raise ValueError("loop variant unhandled")
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def test_module(self):
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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self.module.resetwarnings()
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self.module.filterwarnings("module", category=UserWarning)
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message = UserWarning("FilterTests.test_module")
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self.module.warn(message, UserWarning)
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self.assertEqual(w[-1].message, message)
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del w[:]
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self.module.warn(message, UserWarning)
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self.assertEqual(len(w), 0)
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def test_once(self):
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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self.module.resetwarnings()
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self.module.filterwarnings("once", category=UserWarning)
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message = UserWarning("FilterTests.test_once")
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self.module.warn_explicit(message, UserWarning, "__init__.py",
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42)
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self.assertEqual(w[-1].message, message)
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del w[:]
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self.module.warn_explicit(message, UserWarning, "__init__.py",
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13)
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self.assertEqual(len(w), 0)
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self.module.warn_explicit(message, UserWarning, "test_warnings2.py",
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42)
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self.assertEqual(len(w), 0)
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def test_module_globals(self):
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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self.module.simplefilter("always", UserWarning)
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# bpo-33509: module_globals=None must not crash
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self.module.warn_explicit('msg', UserWarning, "filename", 42,
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module_globals=None)
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self.assertEqual(len(w), 1)
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# Invalid module_globals type
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with self.assertRaises(TypeError):
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self.module.warn_explicit('msg', UserWarning, "filename", 42,
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module_globals=True)
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self.assertEqual(len(w), 1)
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# Empty module_globals
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self.module.warn_explicit('msg', UserWarning, "filename", 42,
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module_globals={})
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self.assertEqual(len(w), 2)
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def test_inheritance(self):
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with original_warnings.catch_warnings(module=self.module) as w:
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self.module.resetwarnings()
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self.module.filterwarnings("error", category=Warning)
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self.assertRaises(UserWarning, self.module.warn,
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"FilterTests.test_inheritance", UserWarning)
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def test_ordering(self):
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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self.module.resetwarnings()
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self.module.filterwarnings("ignore", category=UserWarning)
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self.module.filterwarnings("error", category=UserWarning,
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append=True)
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del w[:]
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try:
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self.module.warn("FilterTests.test_ordering", UserWarning)
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except UserWarning:
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self.fail("order handling for actions failed")
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self.assertEqual(len(w), 0)
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def test_filterwarnings(self):
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# Test filterwarnings().
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# Implicitly also tests resetwarnings().
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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self.module.filterwarnings("error", "", Warning, "", 0)
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self.assertRaises(UserWarning, self.module.warn, 'convert to error')
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self.module.resetwarnings()
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text = 'handle normally'
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self.module.warn(text)
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self.assertEqual(str(w[-1].message), text)
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self.assertIs(w[-1].category, UserWarning)
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self.module.filterwarnings("ignore", "", Warning, "", 0)
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text = 'filtered out'
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self.module.warn(text)
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self.assertNotEqual(str(w[-1].message), text)
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self.module.resetwarnings()
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self.module.filterwarnings("error", "hex*", Warning, "", 0)
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self.assertRaises(UserWarning, self.module.warn, 'hex/oct')
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text = 'nonmatching text'
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self.module.warn(text)
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self.assertEqual(str(w[-1].message), text)
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self.assertIs(w[-1].category, UserWarning)
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def test_message_matching(self):
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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self.module.simplefilter("ignore", UserWarning)
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self.module.filterwarnings("error", "match", UserWarning)
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self.assertRaises(UserWarning, self.module.warn, "match")
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self.assertRaises(UserWarning, self.module.warn, "match prefix")
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self.module.warn("suffix match")
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self.assertEqual(w, [])
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self.module.warn("something completely different")
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self.assertEqual(w, [])
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def test_mutate_filter_list(self):
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class X:
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def match(self, a):
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L[:] = []
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L = [("default",X(),UserWarning,X(),0) for i in range(2)]
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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self.module.filters = L
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self.module.warn_explicit(UserWarning("b"), None, "f.py", 42)
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self.assertEqual(str(w[-1].message), "b")
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def test_filterwarnings_duplicate_filters(self):
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with original_warnings.catch_warnings(module=self.module):
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self.module.resetwarnings()
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self.module.filterwarnings("error", category=UserWarning)
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self.assertEqual(len(self.module.filters), 1)
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self.module.filterwarnings("ignore", category=UserWarning)
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self.module.filterwarnings("error", category=UserWarning)
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self.assertEqual(
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len(self.module.filters), 2,
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"filterwarnings inserted duplicate filter"
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)
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self.assertEqual(
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self.module.filters[0][0], "error",
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"filterwarnings did not promote filter to "
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"the beginning of list"
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)
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def test_simplefilter_duplicate_filters(self):
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with original_warnings.catch_warnings(module=self.module):
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self.module.resetwarnings()
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self.module.simplefilter("error", category=UserWarning)
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self.assertEqual(len(self.module.filters), 1)
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self.module.simplefilter("ignore", category=UserWarning)
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self.module.simplefilter("error", category=UserWarning)
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self.assertEqual(
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len(self.module.filters), 2,
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"simplefilter inserted duplicate filter"
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)
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self.assertEqual(
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self.module.filters[0][0], "error",
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"simplefilter did not promote filter to the beginning of list"
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)
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def test_append_duplicate(self):
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with original_warnings.catch_warnings(module=self.module,
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record=True) as w:
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self.module.resetwarnings()
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self.module.simplefilter("ignore")
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self.module.simplefilter("error", append=True)
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self.module.simplefilter("ignore", append=True)
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self.module.warn("test_append_duplicate", category=UserWarning)
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self.assertEqual(len(self.module.filters), 2,
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"simplefilter inserted duplicate filter"
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)
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self.assertEqual(len(w), 0,
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"appended duplicate changed order of filters"
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)
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class CFilterTests(FilterTests, unittest.TestCase):
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module = c_warnings
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class PyFilterTests(FilterTests, unittest.TestCase):
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module = py_warnings
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class WarnTests(BaseTest):
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"""Test warnings.warn() and warnings.warn_explicit()."""
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def test_message(self):
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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self.module.simplefilter("once")
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for i in range(4):
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text = 'multi %d' %i # Different text on each call.
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self.module.warn(text)
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self.assertEqual(str(w[-1].message), text)
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self.assertIs(w[-1].category, UserWarning)
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# Issue 3639
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def test_warn_nonstandard_types(self):
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# warn() should handle non-standard types without issue.
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for ob in (Warning, None, 42):
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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self.module.simplefilter("once")
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self.module.warn(ob)
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# Don't directly compare objects since
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# ``Warning() != Warning()``.
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self.assertEqual(str(w[-1].message), str(UserWarning(ob)))
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def test_filename(self):
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with warnings_state(self.module):
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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warning_tests.inner("spam1")
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self.assertEqual(os.path.basename(w[-1].filename),
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"stacklevel.py")
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warning_tests.outer("spam2")
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self.assertEqual(os.path.basename(w[-1].filename),
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"stacklevel.py")
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def test_stacklevel(self):
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# Test stacklevel argument
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# make sure all messages are different, so the warning won't be skipped
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with warnings_state(self.module):
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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warning_tests.inner("spam3", stacklevel=1)
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self.assertEqual(os.path.basename(w[-1].filename),
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"stacklevel.py")
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warning_tests.outer("spam4", stacklevel=1)
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self.assertEqual(os.path.basename(w[-1].filename),
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"stacklevel.py")
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warning_tests.inner("spam5", stacklevel=2)
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self.assertEqual(os.path.basename(w[-1].filename),
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"__init__.py")
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warning_tests.outer("spam6", stacklevel=2)
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self.assertEqual(os.path.basename(w[-1].filename),
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"stacklevel.py")
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warning_tests.outer("spam6.5", stacklevel=3)
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self.assertEqual(os.path.basename(w[-1].filename),
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"__init__.py")
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warning_tests.inner("spam7", stacklevel=9999)
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self.assertEqual(os.path.basename(w[-1].filename),
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"sys")
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def test_stacklevel_import(self):
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# Issue #24305: With stacklevel=2, module-level warnings should work.
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support.unload('test.test_warnings.data.import_warning')
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with warnings_state(self.module):
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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self.module.simplefilter('always')
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import test.test_warnings.data.import_warning
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self.assertEqual(len(w), 1)
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self.assertEqual(w[0].filename, __file__)
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|
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def test_exec_filename(self):
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filename = "<warnings-test>"
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codeobj = compile(("import warnings\n"
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"warnings.warn('hello', UserWarning)"),
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filename, "exec")
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with original_warnings.catch_warnings(record=True) as w:
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self.module.simplefilter("always", category=UserWarning)
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exec(codeobj)
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self.assertEqual(w[0].filename, filename)
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|
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def test_warn_explicit_non_ascii_filename(self):
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with original_warnings.catch_warnings(record=True,
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module=self.module) as w:
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self.module.resetwarnings()
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self.module.filterwarnings("always", category=UserWarning)
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for filename in ("nonascii\xe9\u20ac", "surrogate\udc80"):
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try:
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os.fsencode(filename)
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except UnicodeEncodeError:
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continue
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self.module.warn_explicit("text", UserWarning, filename, 1)
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self.assertEqual(w[-1].filename, filename)
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|
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def test_warn_explicit_type_errors(self):
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# warn_explicit() should error out gracefully if it is given objects
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# of the wrong types.
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# lineno is expected to be an integer.
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self.assertRaises(TypeError, self.module.warn_explicit,
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None, UserWarning, None, None)
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# Either 'message' needs to be an instance of Warning or 'category'
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# needs to be a subclass.
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self.assertRaises(TypeError, self.module.warn_explicit,
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None, None, None, 1)
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# 'registry' must be a dict or None.
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self.assertRaises((TypeError, AttributeError),
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self.module.warn_explicit,
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None, Warning, None, 1, registry=42)
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|
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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)
|
|
|
|
class CWarnTests(WarnTests, unittest.TestCase):
|
|
module = c_warnings
|
|
|
|
# As an early adopter, we sanity check the
|
|
# test.support.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.support.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')
|
|
self.module._setoption('error::Warning::0')
|
|
self.assertRaises(UserWarning, self.module.warn, 'convert to error')
|
|
|
|
|
|
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 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)
|
|
|
|
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.
|
|
def get_bad_loader(splitlines_ret_val):
|
|
class BadLoader:
|
|
def get_source(self, fullname):
|
|
class BadSource(str):
|
|
def splitlines(self):
|
|
return splitlines_ret_val
|
|
return BadSource('spam')
|
|
return BadLoader()
|
|
|
|
wmod = self.module
|
|
with original_warnings.catch_warnings(module=wmod):
|
|
wmod.filterwarnings('default', category=UserWarning)
|
|
|
|
with support.captured_stderr() as stderr:
|
|
wmod.warn_explicit(
|
|
'foo', UserWarning, 'bar', 1,
|
|
module_globals={'__loader__': get_bad_loader(42),
|
|
'__name__': 'foobar'})
|
|
self.assertIn('UserWarning: foo', stderr.getvalue())
|
|
|
|
show = wmod._showwarnmsg
|
|
try:
|
|
del wmod._showwarnmsg
|
|
with support.captured_stderr() as stderr:
|
|
wmod.warn_explicit(
|
|
'eggs', UserWarning, 'bar', 1,
|
|
module_globals={'__loader__': get_bad_loader([42]),
|
|
'__name__': 'foobar'})
|
|
self.assertIn('UserWarning: eggs', stderr.getvalue())
|
|
finally:
|
|
wmod._showwarnmsg = show
|
|
|
|
@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 = 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(WarningsDisplayTests, unittest.TestCase):
|
|
module = c_warnings
|
|
|
|
class PyWarningsDisplayTests(WarningsDisplayTests, unittest.TestCase):
|
|
module = py_warnings
|
|
|
|
def test_tracemalloc(self):
|
|
self.addCleanup(support.unlink, support.TESTFN)
|
|
|
|
with open(support.TESTFN, 'w') as fp:
|
|
fp.write(textwrap.dedent("""
|
|
def func():
|
|
f = open(__file__)
|
|
# Emit ResourceWarning
|
|
f = None
|
|
|
|
func()
|
|
"""))
|
|
|
|
res = assert_python_ok('-Wd', '-X', 'tracemalloc=2', support.TESTFN)
|
|
|
|
stderr = res.err.decode('ascii', 'replace')
|
|
# normalize newlines
|
|
stderr = '\n'.join(stderr.splitlines())
|
|
stderr = re.sub('<.*>', '<...>', stderr)
|
|
expected = textwrap.dedent('''
|
|
{fname}:5: ResourceWarning: unclosed file <...>
|
|
f = None
|
|
Object allocated at (most recent call last):
|
|
File "{fname}", lineno 7
|
|
func()
|
|
File "{fname}", lineno 3
|
|
f = open(__file__)
|
|
''')
|
|
expected = expected.format(fname=support.TESTFN).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 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, 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 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):
|
|
rc, stdout, stderr = assert_python_ok("-c",
|
|
"import sys; sys.stdout.write(str(sys.warnoptions))",
|
|
PYTHONIOENCODING="utf-8",
|
|
PYTHONWARNINGS="ignore:DeprecaciónWarning",
|
|
PYTHONDEVMODE="")
|
|
self.assertEqual(stdout,
|
|
"['ignore:DeprecaciónWarning']".encode('utf-8'))
|
|
|
|
class CEnvironmentVariableTests(EnvironmentVariableTests, unittest.TestCase):
|
|
module = c_warnings
|
|
|
|
class PyEnvironmentVariableTests(EnvironmentVariableTests, unittest.TestCase):
|
|
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'):
|
|
# 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):
|
|
@support.requires_type_collecting
|
|
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(), '<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()
|