mirror of
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685 lines
28 KiB
Python
685 lines
28 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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py_warnings = test_support.import_fresh_module('warnings', blocked=['_warnings'])
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c_warnings = test_support.import_fresh_module('warnings', fresh=['_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.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_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.assertTrue(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.assertTrue(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.assertTrue(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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def test_bad_str(self):
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# issue 6415
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# Warnings instance with a bad format string for __str__ should not
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# trigger a bus error.
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class BadStrWarning(Warning):
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"""Warning with a bad format string for __str__."""
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def __str__(self):
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return ("A bad formatted string %(err)" %
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{"err" : "there is no %(err)s"})
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with self.assertRaises(ValueError):
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self.module.warn(BadStrWarning())
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class CWarnTests(BaseTest, WarnTests):
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module = c_warnings
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# As an early adopter, we sanity check the
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# test_support.import_fresh_module utility function
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def test_accelerated(self):
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self.assertFalse(original_warnings is self.module)
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self.assertFalse(hasattr(self.module.warn, 'func_code'))
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class PyWarnTests(BaseTest, WarnTests):
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module = py_warnings
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# As an early adopter, we sanity check the
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# test_support.import_fresh_module utility function
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def test_pure_python(self):
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self.assertFalse(original_warnings is self.module)
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self.assertTrue(hasattr(self.module.warn, 'func_code'))
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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.assertEqual(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.assertEqual(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_default_action(self):
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# Replacing or removing defaultaction should be okay.
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message = UserWarning("defaultaction test")
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original = self.module.defaultaction
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try:
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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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registry = {}
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self.module.warn_explicit(message, UserWarning, "<test>", 42,
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registry=registry)
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self.assertEqual(w[-1].message, message)
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self.assertEqual(len(w), 1)
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self.assertEqual(len(registry), 1)
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del w[:]
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# Test removal.
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del self.module.defaultaction
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__warningregistry__ = {}
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registry = {}
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self.module.warn_explicit(message, UserWarning, "<test>", 43,
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registry=registry)
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self.assertEqual(w[-1].message, message)
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self.assertEqual(len(w), 1)
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self.assertEqual(len(registry), 1)
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del w[:]
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# Test setting.
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self.module.defaultaction = "ignore"
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__warningregistry__ = {}
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registry = {}
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self.module.warn_explicit(message, UserWarning, "<test>", 44,
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registry=registry)
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self.assertEqual(len(w), 0)
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finally:
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self.module.defaultaction = original
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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.assertIn(text, result)
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def test_showwarning_not_callable(self):
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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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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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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 test_support.captured_output('stderr') as stream:
|
|
warning_tests.inner(text)
|
|
result = stream.getvalue()
|
|
self.assertEqual(result.count('\n'), 2,
|
|
"Too many newlines in %r" % result)
|
|
first_line, second_line = result.split('\n', 1)
|
|
expected_file = os.path.splitext(warning_tests.__file__)[0] + '.py'
|
|
first_line_parts = first_line.rsplit(':', 3)
|
|
path, line, warning_class, message = first_line_parts
|
|
line = int(line)
|
|
self.assertEqual(expected_file, path)
|
|
self.assertEqual(warning_class, ' ' + UserWarning.__name__)
|
|
self.assertEqual(message, ' ' + text)
|
|
expected_line = ' ' + linecache.getline(path, line).strip() + '\n'
|
|
assert expected_line
|
|
self.assertEqual(second_line, expected_line)
|
|
|
|
|
|
class WarningsDisplayTests(unittest.TestCase):
|
|
|
|
"""Test the displaying of warnings and the ability to overload functions
|
|
related to displaying warnings."""
|
|
|
|
def test_formatwarning(self):
|
|
message = "msg"
|
|
category = Warning
|
|
file_name = os.path.splitext(warning_tests.__file__)[0] + '.py'
|
|
line_num = 3
|
|
file_line = linecache.getline(file_name, line_num).strip()
|
|
format = "%s:%s: %s: %s\n %s\n"
|
|
expect = format % (file_name, line_num, category.__name__, message,
|
|
file_line)
|
|
self.assertEqual(expect, self.module.formatwarning(message,
|
|
category, file_name, line_num))
|
|
# Test the 'line' argument.
|
|
file_line += " for the win!"
|
|
expect = format % (file_name, line_num, category.__name__, message,
|
|
file_line)
|
|
self.assertEqual(expect, self.module.formatwarning(message,
|
|
category, file_name, line_num, file_line))
|
|
|
|
def test_showwarning(self):
|
|
file_name = os.path.splitext(warning_tests.__file__)[0] + '.py'
|
|
line_num = 3
|
|
expected_file_line = linecache.getline(file_name, line_num).strip()
|
|
message = 'msg'
|
|
category = Warning
|
|
file_object = StringIO.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.StringIO()
|
|
self.module.showwarning(message, category, file_name, line_num,
|
|
file_object, expected_file_line)
|
|
self.assertEqual(expect, file_object.getvalue())
|
|
|
|
class CWarningsDisplayTests(BaseTest, WarningsDisplayTests):
|
|
module = c_warnings
|
|
|
|
class PyWarningsDisplayTests(BaseTest, WarningsDisplayTests):
|
|
module = py_warnings
|
|
|
|
|
|
class CatchWarningTests(BaseTest):
|
|
|
|
"""Test catch_warnings()."""
|
|
|
|
def test_catch_warnings_restore(self):
|
|
wmod = self.module
|
|
orig_filters = wmod.filters
|
|
orig_showwarning = wmod.showwarning
|
|
# Ensure both showwarning and filters are restored when recording
|
|
with wmod.catch_warnings(module=wmod, record=True):
|
|
wmod.filters = wmod.showwarning = object()
|
|
self.assertTrue(wmod.filters is orig_filters)
|
|
self.assertTrue(wmod.showwarning is orig_showwarning)
|
|
# Same test, but with recording disabled
|
|
with wmod.catch_warnings(module=wmod, record=False):
|
|
wmod.filters = wmod.showwarning = object()
|
|
self.assertTrue(wmod.filters is orig_filters)
|
|
self.assertTrue(wmod.showwarning is orig_showwarning)
|
|
|
|
def test_catch_warnings_recording(self):
|
|
wmod = self.module
|
|
# Ensure warnings are recorded when requested
|
|
with wmod.catch_warnings(module=wmod, record=True) as w:
|
|
self.assertEqual(w, [])
|
|
self.assertTrue(type(w) is list)
|
|
wmod.simplefilter("always")
|
|
wmod.warn("foo")
|
|
self.assertEqual(str(w[-1].message), "foo")
|
|
wmod.warn("bar")
|
|
self.assertEqual(str(w[-1].message), "bar")
|
|
self.assertEqual(str(w[0].message), "foo")
|
|
self.assertEqual(str(w[1].message), "bar")
|
|
del w[:]
|
|
self.assertEqual(w, [])
|
|
# Ensure warnings are not recorded when not requested
|
|
orig_showwarning = wmod.showwarning
|
|
with wmod.catch_warnings(module=wmod, record=False) as w:
|
|
self.assertTrue(w is None)
|
|
self.assertTrue(wmod.showwarning is orig_showwarning)
|
|
|
|
def test_catch_warnings_reentry_guard(self):
|
|
wmod = self.module
|
|
# Ensure catch_warnings is protected against incorrect usage
|
|
x = wmod.catch_warnings(module=wmod, record=True)
|
|
self.assertRaises(RuntimeError, x.__exit__)
|
|
with x:
|
|
self.assertRaises(RuntimeError, x.__enter__)
|
|
# Same test, but with recording disabled
|
|
x = wmod.catch_warnings(module=wmod, record=False)
|
|
self.assertRaises(RuntimeError, x.__exit__)
|
|
with x:
|
|
self.assertRaises(RuntimeError, x.__enter__)
|
|
|
|
def test_catch_warnings_defaults(self):
|
|
wmod = self.module
|
|
orig_filters = wmod.filters
|
|
orig_showwarning = wmod.showwarning
|
|
# Ensure default behaviour is not to record warnings
|
|
with wmod.catch_warnings(module=wmod) as w:
|
|
self.assertTrue(w is None)
|
|
self.assertTrue(wmod.showwarning is orig_showwarning)
|
|
self.assertTrue(wmod.filters is not orig_filters)
|
|
self.assertTrue(wmod.filters is orig_filters)
|
|
if wmod is sys.modules['warnings']:
|
|
# Ensure the default module is this one
|
|
with wmod.catch_warnings() as w:
|
|
self.assertTrue(w is None)
|
|
self.assertTrue(wmod.showwarning is orig_showwarning)
|
|
self.assertTrue(wmod.filters is not orig_filters)
|
|
self.assertTrue(wmod.filters is orig_filters)
|
|
|
|
def test_check_warnings(self):
|
|
# Explicit tests for the test_support convenience wrapper
|
|
wmod = self.module
|
|
if wmod is not sys.modules['warnings']:
|
|
return
|
|
with test_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 test_support.check_warnings():
|
|
# defaults to quiet=True without argument
|
|
pass
|
|
with test_support.check_warnings(('foo', UserWarning)):
|
|
wmod.warn("foo")
|
|
|
|
with self.assertRaises(AssertionError):
|
|
with test_support.check_warnings(('', RuntimeWarning)):
|
|
# defaults to quiet=False with argument
|
|
pass
|
|
with self.assertRaises(AssertionError):
|
|
with test_support.check_warnings(('foo', RuntimeWarning)):
|
|
wmod.warn("foo")
|
|
|
|
|
|
class CCatchWarningTests(CatchWarningTests):
|
|
module = c_warnings
|
|
|
|
class PyCatchWarningTests(CatchWarningTests):
|
|
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,
|
|
)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|