Python test.test_support.captured_output() Examples

The following are 30 code examples of test.test_support.captured_output(). You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may also want to check out all available functions/classes of the module test.test_support , or try the search function .
Example #1
Source File: test_io.py    From ironpython2 with Apache License 2.0 6 votes vote down vote up 
def test_error_through_destructor(self):
        # Test that the exception state is not modified by a destructor,
        # even if close() fails.
        rawio = self.CloseFailureIO()
        def f():
            self.TextIOWrapper(rawio).xyzzy
        with support.captured_output("stderr") as s:
            self.assertRaises(AttributeError, f)
        s = s.getvalue().strip()
        if s:
            # The destructor *may* have printed an unraisable error, check it
            self.assertEqual(len(s.splitlines()), 1)
            self.assertTrue(s.startswith("Exception IOError: "), s)
            self.assertTrue(s.endswith(" ignored"), s)

    # Systematic tests of the text I/O API
Example #2
Source File: test_thread.py    From gcblue with BSD 3-Clause "New" or "Revised" License 6 votes vote down vote up 
def test_save_exception_state_on_error(self):
        # See issue #14474
        def task():
            started.release()
            raise SyntaxError
        def mywrite(self, *args):
            try:
                raise ValueError
            except ValueError:
                pass
            real_write(self, *args)
        c = thread._count()
        started = thread.allocate_lock()
        with test_support.captured_output("stderr") as stderr:
            real_write = stderr.write
            stderr.write = mywrite
            started.acquire()
            thread.start_new_thread(task, ())
            started.acquire()
            while thread._count() > c:
                time.sleep(0.01)
        self.assertIn("Traceback", stderr.getvalue())
Example #3
Source File: test_warnings.py    From gcblue with BSD 3-Clause "New" or "Revised" License 6 votes vote down vote up 
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)
Example #4
Source File: test_io.py    From gcblue with BSD 3-Clause "New" or "Revised" License 6 votes vote down vote up 
def test_error_through_destructor(self):
        # Test that the exception state is not modified by a destructor,
        # even if close() fails.
        rawio = self.CloseFailureIO()
        def f():
            self.TextIOWrapper(rawio).xyzzy
        with support.captured_output("stderr") as s:
            self.assertRaises(AttributeError, f)
        s = s.getvalue().strip()
        if s:
            # The destructor *may* have printed an unraisable error, check it
            self.assertEqual(len(s.splitlines()), 1)
            self.assertTrue(s.startswith("Exception IOError: "), s)
            self.assertTrue(s.endswith(" ignored"), s)

    # Systematic tests of the text I/O API
Example #5
Source File: test_io.py    From CTFCrackTools-V2 with GNU General Public License v3.0 6 votes vote down vote up 
def test_error_through_destructor(self):
        # Test that the exception state is not modified by a destructor,
        # even if close() fails.
        rawio = self.CloseFailureIO()
        def f():
            self.TextIOWrapper(rawio).xyzzy
        with support.captured_output("stderr") as s:
            self.assertRaises(AttributeError, f)
        s = s.getvalue().strip()
        if s:
            # The destructor *may* have printed an unraisable error, check it
            self.assertEqual(len(s.splitlines()), 1)
            self.assertTrue(s.startswith("Exception IOError: "), s)
            self.assertTrue(s.endswith(" ignored"), s)

    # Systematic tests of the text I/O API
Example #6
Source File: test_thread.py    From oss-ftp with MIT License 6 votes vote down vote up 
def test_save_exception_state_on_error(self):
        # See issue #14474
        def task():
            started.release()
            raise SyntaxError
        def mywrite(self, *args):
            try:
                raise ValueError
            except ValueError:
                pass
            real_write(self, *args)
        c = thread._count()
        started = thread.allocate_lock()
        with test_support.captured_output("stderr") as stderr:
            real_write = stderr.write
            stderr.write = mywrite
            started.acquire()
            thread.start_new_thread(task, ())
            started.acquire()
            while thread._count() > c:
                time.sleep(0.01)
        self.assertIn("Traceback", stderr.getvalue())
Example #7
Source File: test_warnings.py    From oss-ftp with MIT License 6 votes vote down vote up 
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)
Example #8
Source File: test_warnings.py    From CTFCrackTools-V2 with GNU General Public License v3.0 6 votes vote down vote up 
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 = warning_tests_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)
Example #9
Source File: test_io.py    From oss-ftp with MIT License 6 votes vote down vote up 
def test_error_through_destructor(self):
        # Test that the exception state is not modified by a destructor,
        # even if close() fails.
        rawio = self.CloseFailureIO()
        def f():
            self.TextIOWrapper(rawio).xyzzy
        with support.captured_output("stderr") as s:
            self.assertRaises(AttributeError, f)
        s = s.getvalue().strip()
        if s:
            # The destructor *may* have printed an unraisable error, check it
            self.assertEqual(len(s.splitlines()), 1)
            self.assertTrue(s.startswith("Exception IOError: "), s)
            self.assertTrue(s.endswith(" ignored"), s)

    # Systematic tests of the text I/O API
Example #10
Source File: test_thread.py    From BinderFilter with MIT License 6 votes vote down vote up 
def test_save_exception_state_on_error(self):
        # See issue #14474
        def task():
            started.release()
            raise SyntaxError
        def mywrite(self, *args):
            try:
                raise ValueError
            except ValueError:
                pass
            real_write(self, *args)
        c = thread._count()
        started = thread.allocate_lock()
        with test_support.captured_output("stderr") as stderr:
            real_write = stderr.write
            stderr.write = mywrite
            started.acquire()
            thread.start_new_thread(task, ())
            started.acquire()
            while thread._count() > c:
                time.sleep(0.01)
        self.assertIn("Traceback", stderr.getvalue())
Example #11
Source File: test_io.py    From CTFCrackTools with GNU General Public License v3.0 6 votes vote down vote up 
def test_error_through_destructor(self):
        # Test that the exception state is not modified by a destructor,
        # even if close() fails.
        rawio = self.CloseFailureIO()
        def f():
            self.TextIOWrapper(rawio).xyzzy
        with support.captured_output("stderr") as s:
            self.assertRaises(AttributeError, f)
        s = s.getvalue().strip()
        if s:
            # The destructor *may* have printed an unraisable error, check it
            self.assertEqual(len(s.splitlines()), 1)
            self.assertTrue(s.startswith("Exception IOError: "), s)
            self.assertTrue(s.endswith(" ignored"), s)

    # Systematic tests of the text I/O API
Example #12
Source File: test_warnings.py    From BinderFilter with MIT License 6 votes vote down vote up 
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)
Example #13
Source File: test_warnings.py    From ironpython2 with Apache License 2.0 6 votes vote down vote up 
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)
Example #14
Source File: test_io.py    From BinderFilter with MIT License 6 votes vote down vote up 
def test_error_through_destructor(self):
        # Test that the exception state is not modified by a destructor,
        # even if close() fails.
        rawio = self.CloseFailureIO()
        def f():
            self.TextIOWrapper(rawio).xyzzy
        with support.captured_output("stderr") as s:
            self.assertRaises(AttributeError, f)
        s = s.getvalue().strip()
        if s:
            # The destructor *may* have printed an unraisable error, check it
            self.assertEqual(len(s.splitlines()), 1)
            self.assertTrue(s.startswith("Exception IOError: "), s)
            self.assertTrue(s.endswith(" ignored"), s)

    # Systematic tests of the text I/O API
Example #15
Source File: test_warnings.py    From CTFCrackTools with GNU General Public License v3.0 6 votes vote down vote up 
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 = warning_tests_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)
Example #16
Source File: test_site.py    From CTFCrackTools with GNU General Public License v3.0 5 votes vote down vote up 
def test_addpackage_import_bad_pth_file(self):
        # Issue 5258
        pth_dir, pth_fn = self.make_pth("abc\x00def\n")
        with captured_output("stderr") as err_out:
            site.addpackage(pth_dir, pth_fn, set())
        self.assertRegexpMatches(err_out.getvalue(), "line 1")
        self.assertRegexpMatches(err_out.getvalue(),
            re.escape(os.path.join(pth_dir, pth_fn)))
        # XXX: ditto previous XXX comment.
        self.assertRegexpMatches(err_out.getvalue(), 'Traceback')
        self.assertRegexpMatches(err_out.getvalue(), 'TypeError')
Example #17
Source File: test_io.py    From ironpython2 with Apache License 2.0 5 votes vote down vote up 
def test_error_through_destructor(self):
        # Test that the exception state is not modified by a destructor,
        # even if close() fails.
        rawio = self.CloseFailureIO()
        def f():
            self.tp(rawio).xyzzy
        with support.captured_output("stderr") as s:
            self.assertRaises(AttributeError, f)
        s = s.getvalue().strip()
        if s:
            # The destructor *may* have printed an unraisable error, check it
            self.assertEqual(len(s.splitlines()), 1)
            self.assertTrue(s.startswith("Exception IOError: "), s)
            self.assertTrue(s.endswith(" ignored"), s)
Example #18
Source File: test_site.py    From gcblue with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
def test_addpackage_import_bad_exec(self):
        # Issue 10642
        pth_dir, pth_fn = self.make_pth("randompath\nimport nosuchmodule\n")
        with captured_output("stderr") as err_out:
            site.addpackage(pth_dir, pth_fn, set())
        self.assertRegexpMatches(err_out.getvalue(), "line 2")
        self.assertRegexpMatches(err_out.getvalue(),
            re.escape(os.path.join(pth_dir, pth_fn)))
        # XXX: ditto previous XXX comment.
        self.assertRegexpMatches(err_out.getvalue(), 'Traceback')
        self.assertRegexpMatches(err_out.getvalue(), 'ImportError')
Example #19
Source File: test_site.py    From gcblue with BSD 3-Clause "New" or "Revised" License 5 votes vote down vote up 
def test_addpackage_import_bad_pth_file(self):
        # Issue 5258
        pth_dir, pth_fn = self.make_pth("abc\x00def\n")
        with captured_output("stderr") as err_out:
            site.addpackage(pth_dir, pth_fn, set())
        self.assertRegexpMatches(err_out.getvalue(), "line 1")
        self.assertRegexpMatches(err_out.getvalue(),
            re.escape(os.path.join(pth_dir, pth_fn)))
        # XXX: ditto previous XXX comment.
        self.assertRegexpMatches(err_out.getvalue(), 'Traceback')
        self.assertRegexpMatches(err_out.getvalue(), 'TypeError')
Example #20
Source File: test_io.py    From CTFCrackTools-V2 with GNU General Public License v3.0 5 votes vote down vote up 
def test_error_through_destructor(self):
        # Test that the exception state is not modified by a destructor,
        # even if close() fails.
        rawio = self.CloseFailureIO()
        def f():
            self.tp(rawio).xyzzy
        with support.captured_output("stderr") as s:
            self.assertRaises(AttributeError, f)
        s = s.getvalue().strip()
        if s:
            # The destructor *may* have printed an unraisable error, check it
            self.assertEqual(len(s.splitlines()), 1)
            self.assertTrue(s.startswith("Exception IOError: "), s)
            self.assertTrue(s.endswith(" ignored"), s)
Example #21
Source File: test_site.py    From CTFCrackTools with GNU General Public License v3.0 5 votes vote down vote up 
def test_addpackage_import_bad_exec(self):
        # Issue 10642
        pth_dir, pth_fn = self.make_pth("randompath\nimport nosuchmodule\n")
        with captured_output("stderr") as err_out:
            site.addpackage(pth_dir, pth_fn, set())
        self.assertRegexpMatches(err_out.getvalue(), "line 2")
        self.assertRegexpMatches(err_out.getvalue(),
            re.escape(os.path.join(pth_dir, pth_fn)))
        # XXX: ditto previous XXX comment.
        self.assertRegexpMatches(err_out.getvalue(), 'Traceback')
        self.assertRegexpMatches(err_out.getvalue(), 'ImportError')
Example #22
Source File: test_warnings.py    From CTFCrackTools-V2 with GNU General Public License v3.0 5 votes vote down vote up 
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 test_support.captured_output('stderr') as stream:
                self.module.warn(text)
                result = stream.getvalue()
        self.assertIn(text, result)
Example #23
Source File: test_itertools.py    From CTFCrackTools with GNU General Public License v3.0 5 votes vote down vote up 
def test_bug_7244(self):

        class Repeater(object):
            # this class is similar to itertools.repeat
            def __init__(self, o, t, e):
                self.o = o
                self.t = int(t)
                self.e = e
            def __iter__(self): # its iterator is itself
                return self
            def next(self):
                if self.t > 0:
                    self.t -= 1
                    return self.o
                else:
                    raise self.e

        # Formerly this code in would fail in debug mode
        # with Undetected Error and Stop Iteration
        r1 = Repeater(1, 3, StopIteration)
        r2 = Repeater(2, 4, StopIteration)
        def run(r1, r2):
            result = []
            for i, j in izip_longest(r1, r2, fillvalue=0):
                with test_support.captured_output('stdout'):
                    print (i, j)
                result.append((i, j))
            return result
        self.assertEqual(run(r1, r2), [(1,2), (1,2), (1,2), (0,2)])

        # Formerly, the RuntimeError would be lost
        # and StopIteration would stop as expected
        r1 = Repeater(1, 3, RuntimeError)
        r2 = Repeater(2, 4, StopIteration)
        it = izip_longest(r1, r2, fillvalue=0)
        self.assertEqual(next(it), (1, 2))
        self.assertEqual(next(it), (1, 2))
        self.assertEqual(next(it), (1, 2))
        self.assertRaises(RuntimeError, next, it)
Example #24
Source File: test_warnings.py    From CTFCrackTools with GNU General Public License v3.0 5 votes vote down vote up 
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 test_support.captured_output('stderr') as stream:
                self.module.warn(text)
                result = stream.getvalue()
        self.assertIn(text, result)
Example #25
Source File: test_itertools.py    From CTFCrackTools-V2 with GNU General Public License v3.0 5 votes vote down vote up 
def test_bug_7244(self):

        class Repeater(object):
            # this class is similar to itertools.repeat
            def __init__(self, o, t, e):
                self.o = o
                self.t = int(t)
                self.e = e
            def __iter__(self): # its iterator is itself
                return self
            def next(self):
                if self.t > 0:
                    self.t -= 1
                    return self.o
                else:
                    raise self.e

        # Formerly this code in would fail in debug mode
        # with Undetected Error and Stop Iteration
        r1 = Repeater(1, 3, StopIteration)
        r2 = Repeater(2, 4, StopIteration)
        def run(r1, r2):
            result = []
            for i, j in izip_longest(r1, r2, fillvalue=0):
                with test_support.captured_output('stdout'):
                    print (i, j)
                result.append((i, j))
            return result
        self.assertEqual(run(r1, r2), [(1,2), (1,2), (1,2), (0,2)])

        # Formerly, the RuntimeError would be lost
        # and StopIteration would stop as expected
        r1 = Repeater(1, 3, RuntimeError)
        r2 = Repeater(2, 4, StopIteration)
        it = izip_longest(r1, r2, fillvalue=0)
        self.assertEqual(next(it), (1, 2))
        self.assertEqual(next(it), (1, 2))
        self.assertEqual(next(it), (1, 2))
        self.assertRaises(RuntimeError, next, it)
Example #26
Source File: test_site.py    From CTFCrackTools-V2 with GNU General Public License v3.0 5 votes vote down vote up 
def test_addpackage_import_bad_exec(self):
        # Issue 10642
        pth_dir, pth_fn = self.make_pth("randompath\nimport nosuchmodule\n")
        with captured_output("stderr") as err_out:
            site.addpackage(pth_dir, pth_fn, set())
        self.assertRegexpMatches(err_out.getvalue(), "line 2")
        self.assertRegexpMatches(err_out.getvalue(),
            re.escape(os.path.join(pth_dir, pth_fn)))
        # XXX: ditto previous XXX comment.
        self.assertRegexpMatches(err_out.getvalue(), 'Traceback')
        self.assertRegexpMatches(err_out.getvalue(), 'ImportError')
Example #27
Source File: test_site.py    From CTFCrackTools-V2 with GNU General Public License v3.0 5 votes vote down vote up 
def test_addpackage_import_bad_pth_file(self):
        # Issue 5258
        pth_dir, pth_fn = self.make_pth("abc\x00def\n")
        with captured_output("stderr") as err_out:
            site.addpackage(pth_dir, pth_fn, set())
        self.assertRegexpMatches(err_out.getvalue(), "line 1")
        self.assertRegexpMatches(err_out.getvalue(),
            re.escape(os.path.join(pth_dir, pth_fn)))
        # XXX: ditto previous XXX comment.
        self.assertRegexpMatches(err_out.getvalue(), 'Traceback')
        self.assertRegexpMatches(err_out.getvalue(), 'TypeError')
Example #28
Source File: test_io.py    From CTFCrackTools with GNU General Public License v3.0 5 votes vote down vote up 
def test_error_through_destructor(self):
        # Test that the exception state is not modified by a destructor,
        # even if close() fails.
        rawio = self.CloseFailureIO()
        def f():
            self.tp(rawio).xyzzy
        with support.captured_output("stderr") as s:
            self.assertRaises(AttributeError, f)
        s = s.getvalue().strip()
        if s:
            # The destructor *may* have printed an unraisable error, check it
            self.assertEqual(len(s.splitlines()), 1)
            self.assertTrue(s.startswith("Exception IOError: "), s)
            self.assertTrue(s.endswith(" ignored"), s)
Example #29
Source File: test_site.py    From BinderFilter with MIT License 5 votes vote down vote up 
def test_addpackage_import_bad_pth_file(self):
        # Issue 5258
        pth_dir, pth_fn = self.make_pth("abc\x00def\n")
        with captured_output("stderr") as err_out:
            site.addpackage(pth_dir, pth_fn, set())
        self.assertRegexpMatches(err_out.getvalue(), "line 1")
        self.assertRegexpMatches(err_out.getvalue(),
            re.escape(os.path.join(pth_dir, pth_fn)))
        # XXX: ditto previous XXX comment.
        self.assertRegexpMatches(err_out.getvalue(), 'Traceback')
        self.assertRegexpMatches(err_out.getvalue(), 'TypeError')
Example #30
Source File: test_warnings.py    From ironpython2 with Apache License 2.0 5 votes vote down vote up 
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 test_support.captured_output('stderr') as stream:
                self.module.warn(text)
                result = stream.getvalue()
        self.assertIn(text, result)