Python test_support.captured_output方法代码示例

# 需要导入模块: from test import test_support [as 别名]
# 或者: from test.test_support import captured_output [as 别名]
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 

# 需要导入模块: from test import test_support [as 别名]
# 或者: from test.test_support import captured_output [as 别名]
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) 

# 需要导入模块: from test import test_support [as 别名]
# 或者: from test.test_support import captured_output [as 别名]
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()) 

# 需要导入模块: from test import test_support [as 别名]
# 或者: from test.test_support import captured_output [as 别名]
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) 

# 需要导入模块: from test import test_support [as 别名]
# 或者: from test.test_support import captured_output [as 别名]
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) 

# 需要导入模块: from test import test_support [as 别名]
# 或者: from test.test_support import captured_output [as 别名]
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) 

# 需要导入模块: from test import test_support [as 别名]
# 或者: from test.test_support import captured_output [as 别名]
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') 

# 需要导入模块: from test import test_support [as 别名]
# 或者: from test.test_support import captured_output [as 别名]
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') 

# 需要导入模块: from test import test_support [as 别名]
# 或者: from test.test_support import captured_output [as 别名]
def test_addpackage_import_bad_syntax(self):
        # Issue 10642
        pth_dir, pth_fn = self.make_pth("import bad)syntax\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: the previous two should be independent checks so that the
        # order doesn't matter.  The next three could be a single check
        # but my regex foo isn't good enough to write it.
        self.assertRegexpMatches(err_out.getvalue(), 'Traceback')
        self.assertRegexpMatches(err_out.getvalue(), r'import bad\)syntax')
        self.assertRegexpMatches(err_out.getvalue(), 'SyntaxError')