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672237dc6c
WarningsRecorder object. This makes the API simpler to use as no special object must be learned. Closes issue 3781. Review by Benjamin Peterson.
605 lines
24 KiB
Python
605 lines
24 KiB
Python
from contextlib import contextmanager
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import linecache
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import os
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import StringIO
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import sys
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import unittest
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from test import test_support
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import warning_tests
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import warnings as original_warnings
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sys.modules['_warnings'] = 0
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del sys.modules['warnings']
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import warnings as py_warnings
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del sys.modules['_warnings']
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del sys.modules['warnings']
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import warnings as c_warnings
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sys.modules['warnings'] = original_warnings
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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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try:
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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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class BaseTest(unittest.TestCase):
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"""Basic bookkeeping required for testing."""
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def setUp(self):
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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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super(BaseTest, self).setUp()
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def tearDown(self):
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sys.modules['warnings'] = original_warnings
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super(BaseTest, self).tearDown()
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class FilterTests(object):
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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_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.assertEquals(len(w), 0)
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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.assert_(message, w[-1].message)
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self.module.warn(message, UserWarning)
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self.assert_(w[-1].message, 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 xrange(2):
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self.module.warn(message, UserWarning)
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if x == 0:
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self.assertEquals(w[-1].message, message)
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del w[:]
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elif x == 1:
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self.assertEquals(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.assertEquals(w[-1].message, message)
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del w[:]
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self.module.warn(message, UserWarning)
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self.assertEquals(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, "test_warnings.py",
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42)
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self.assertEquals(w[-1].message, message)
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del w[:]
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self.module.warn_explicit(message, UserWarning, "test_warnings.py",
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13)
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self.assertEquals(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.assertEquals(len(w), 0)
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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.assertEquals(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.assert_(w[-1].category is 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.assert_(w[-1].category is UserWarning)
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class CFilterTests(BaseTest, FilterTests):
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module = c_warnings
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class PyFilterTests(BaseTest, FilterTests):
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module = py_warnings
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class WarnTests(unittest.TestCase):
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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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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.assert_(w[-1].category is UserWarning)
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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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"warning_tests.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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"warning_tests.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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"warning_tests.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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"warning_tests.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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"test_warnings.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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"warning_tests.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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"test_warnings.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_missing_filename_not_main(self):
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# If __file__ is not specified and __main__ is not the module name,
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# then __file__ should be set to the module name.
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filename = warning_tests.__file__
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try:
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del warning_tests.__file__
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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("spam8", stacklevel=1)
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self.assertEqual(w[-1].filename, warning_tests.__name__)
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finally:
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warning_tests.__file__ = filename
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def test_missing_filename_main_with_argv(self):
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# If __file__ is not specified and the caller is __main__ and sys.argv
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# exists, then use sys.argv[0] as the file.
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if not hasattr(sys, 'argv'):
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return
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filename = warning_tests.__file__
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module_name = warning_tests.__name__
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try:
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del warning_tests.__file__
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warning_tests.__name__ = '__main__'
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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('spam9', stacklevel=1)
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self.assertEqual(w[-1].filename, sys.argv[0])
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finally:
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warning_tests.__file__ = filename
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warning_tests.__name__ = module_name
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def test_missing_filename_main_without_argv(self):
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# If __file__ is not specified, the caller is __main__, and sys.argv
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# is not set, then '__main__' is the file name.
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filename = warning_tests.__file__
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module_name = warning_tests.__name__
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argv = sys.argv
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try:
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del warning_tests.__file__
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warning_tests.__name__ = '__main__'
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del sys.argv
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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('spam10', stacklevel=1)
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self.assertEqual(w[-1].filename, '__main__')
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finally:
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warning_tests.__file__ = filename
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warning_tests.__name__ = module_name
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sys.argv = argv
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def test_missing_filename_main_with_argv_empty_string(self):
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# If __file__ is not specified, the caller is __main__, and sys.argv[0]
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# is the empty string, then '__main__ is the file name.
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# Tests issue 2743.
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file_name = warning_tests.__file__
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module_name = warning_tests.__name__
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argv = sys.argv
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try:
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del warning_tests.__file__
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warning_tests.__name__ = '__main__'
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sys.argv = ['']
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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('spam11', stacklevel=1)
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self.assertEqual(w[-1].filename, '__main__')
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finally:
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warning_tests.__file__ = file_name
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warning_tests.__name__ = module_name
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sys.argv = argv
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def test_warn_explicit_type_errors(self):
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# warn_explicit() shoud 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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class CWarnTests(BaseTest, WarnTests):
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module = c_warnings
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class PyWarnTests(BaseTest, WarnTests):
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module = py_warnings
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class WCmdLineTests(unittest.TestCase):
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def test_improper_input(self):
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# Uses the private _setoption() function to test the parsing
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# of command-line warning arguments
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with original_warnings.catch_warnings(module=self.module):
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self.assertRaises(self.module._OptionError,
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self.module._setoption, '1:2:3:4:5:6')
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self.assertRaises(self.module._OptionError,
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self.module._setoption, 'bogus::Warning')
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self.assertRaises(self.module._OptionError,
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self.module._setoption, 'ignore:2::4:-5')
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self.module._setoption('error::Warning::0')
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self.assertRaises(UserWarning, self.module.warn, 'convert to error')
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class CWCmdLineTests(BaseTest, WCmdLineTests):
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module = c_warnings
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class PyWCmdLineTests(BaseTest, WCmdLineTests):
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module = py_warnings
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class _WarningsTests(BaseTest):
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"""Tests specific to the _warnings module."""
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module = c_warnings
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def test_filter(self):
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# Everything should function even if 'filters' is not in warnings.
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with original_warnings.catch_warnings(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,
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'convert to error')
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del self.module.filters
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self.assertRaises(UserWarning, self.module.warn,
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'convert to error')
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def test_onceregistry(self):
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# Replacing or removing the onceregistry should be okay.
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global __warningregistry__
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message = UserWarning('onceregistry test')
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try:
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original_registry = self.module.onceregistry
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__warningregistry__ = {}
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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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self.module.warn_explicit(message, UserWarning, "file", 42)
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self.failUnlessEqual(w[-1].message, message)
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del w[:]
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self.module.warn_explicit(message, UserWarning, "file", 42)
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self.assertEquals(len(w), 0)
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# Test the resetting of onceregistry.
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self.module.onceregistry = {}
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__warningregistry__ = {}
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self.module.warn('onceregistry test')
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self.failUnlessEqual(w[-1].message.args, message.args)
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# Removal of onceregistry is okay.
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del w[:]
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del self.module.onceregistry
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__warningregistry__ = {}
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self.module.warn_explicit(message, UserWarning, "file", 42)
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self.assertEquals(len(w), 0)
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finally:
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self.module.onceregistry = original_registry
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def test_showwarning_missing(self):
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# Test that showwarning() missing is okay.
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text = 'del showwarning test'
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with original_warnings.catch_warnings(module=self.module):
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self.module.filterwarnings("always", category=UserWarning)
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del self.module.showwarning
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with test_support.captured_output('stderr') as stream:
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self.module.warn(text)
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result = stream.getvalue()
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self.failUnless(text in result)
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def test_showwarning_not_callable(self):
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self.module.filterwarnings("always", category=UserWarning)
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old_showwarning = self.module.showwarning
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self.module.showwarning = 23
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try:
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self.assertRaises(TypeError, self.module.warn, "Warning!")
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finally:
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self.module.showwarning = old_showwarning
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self.module.resetwarnings()
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def test_show_warning_output(self):
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# With showarning() missing, make sure that output is okay.
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text = 'test show_warning'
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with original_warnings.catch_warnings(module=self.module):
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self.module.filterwarnings("always", category=UserWarning)
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del self.module.showwarning
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with test_support.captured_output('stderr') as stream:
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warning_tests.inner(text)
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result = stream.getvalue()
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self.failUnlessEqual(result.count('\n'), 2,
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"Too many newlines in %r" % result)
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first_line, second_line = result.split('\n', 1)
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expected_file = os.path.splitext(warning_tests.__file__)[0] + '.py'
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first_line_parts = first_line.rsplit(':', 3)
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path, line, warning_class, message = first_line_parts
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line = int(line)
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self.failUnlessEqual(expected_file, path)
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self.failUnlessEqual(warning_class, ' ' + UserWarning.__name__)
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self.failUnlessEqual(message, ' ' + text)
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expected_line = ' ' + linecache.getline(path, line).strip() + '\n'
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assert expected_line
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self.failUnlessEqual(second_line, expected_line)
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class WarningsDisplayTests(unittest.TestCase):
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"""Test the displaying of warnings and the ability to overload functions
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related to displaying warnings."""
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def test_formatwarning(self):
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message = "msg"
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category = Warning
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file_name = os.path.splitext(warning_tests.__file__)[0] + '.py'
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line_num = 3
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file_line = linecache.getline(file_name, line_num).strip()
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format = "%s:%s: %s: %s\n %s\n"
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expect = format % (file_name, line_num, category.__name__, message,
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file_line)
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self.failUnlessEqual(expect, self.module.formatwarning(message,
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category, file_name, line_num))
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# Test the 'line' argument.
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file_line += " for the win!"
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expect = format % (file_name, line_num, category.__name__, message,
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file_line)
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self.failUnlessEqual(expect, self.module.formatwarning(message,
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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.StringIO()
|
|
expect = self.module.formatwarning(message, category, file_name,
|
|
line_num)
|
|
self.module.showwarning(message, category, file_name, line_num,
|
|
file_object)
|
|
self.failUnlessEqual(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.StringIO()
|
|
self.module.showwarning(message, category, file_name, line_num,
|
|
file_object, expected_file_line)
|
|
self.failUnlessEqual(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
|
|
with wmod.catch_warnings(record=True, module=wmod):
|
|
wmod.filters = wmod.showwarning = object()
|
|
self.assert_(wmod.filters is orig_filters)
|
|
self.assert_(wmod.showwarning is orig_showwarning)
|
|
with wmod.catch_warnings(module=wmod, record=False):
|
|
wmod.filters = wmod.showwarning = object()
|
|
self.assert_(wmod.filters is orig_filters)
|
|
self.assert_(wmod.showwarning is orig_showwarning)
|
|
|
|
def test_catch_warnings_recording(self):
|
|
wmod = self.module
|
|
with wmod.catch_warnings(module=wmod, record=True) as w:
|
|
self.assertEqual(w, [])
|
|
self.assertRaises(AttributeError, getattr, w, 'message')
|
|
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, [])
|
|
orig_showwarning = wmod.showwarning
|
|
with wmod.catch_warnings(module=wmod, record=False) as w:
|
|
self.assert_(w is None)
|
|
self.assert_(wmod.showwarning is orig_showwarning)
|
|
|
|
class CCatchWarningTests(CatchWarningTests):
|
|
module = c_warnings
|
|
|
|
class PyCatchWarningTests(CatchWarningTests):
|
|
module = py_warnings
|
|
|
|
|
|
class ShowwarningDeprecationTests(BaseTest):
|
|
|
|
"""Test the deprecation of the old warnings.showwarning() API works."""
|
|
|
|
@staticmethod
|
|
def bad_showwarning(message, category, filename, lineno, file=None):
|
|
pass
|
|
|
|
@staticmethod
|
|
def ok_showwarning(*args):
|
|
pass
|
|
|
|
def test_deprecation(self):
|
|
# message, category, filename, lineno[, file[, line]]
|
|
args = ("message", UserWarning, "file name", 42)
|
|
with original_warnings.catch_warnings(module=self.module):
|
|
self.module.filterwarnings("error", category=DeprecationWarning)
|
|
self.module.showwarning = self.bad_showwarning
|
|
self.assertRaises(DeprecationWarning, self.module.warn_explicit,
|
|
*args)
|
|
self.module.showwarning = self.ok_showwarning
|
|
try:
|
|
self.module.warn_explicit(*args)
|
|
except DeprecationWarning as exc:
|
|
self.fail('showwarning(*args) should not trigger a '
|
|
'DeprecationWarning')
|
|
|
|
class CShowwarningDeprecationTests(ShowwarningDeprecationTests):
|
|
module = c_warnings
|
|
|
|
|
|
class PyShowwarningDeprecationTests(ShowwarningDeprecationTests):
|
|
module = py_warnings
|
|
|
|
|
|
def test_main():
|
|
py_warnings.onceregistry.clear()
|
|
c_warnings.onceregistry.clear()
|
|
test_support.run_unittest(CFilterTests, PyFilterTests,
|
|
CWarnTests, PyWarnTests,
|
|
CWCmdLineTests, PyWCmdLineTests,
|
|
_WarningsTests,
|
|
CWarningsDisplayTests, PyWarningsDisplayTests,
|
|
CCatchWarningTests, PyCatchWarningTests,
|
|
CShowwarningDeprecationTests,
|
|
PyShowwarningDeprecationTests,
|
|
)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|