test_posix.py 文件源码

def test_getcwd_long_pathnames(self):
        dirname = 'getcwd-test-directory-0123456789abcdef-01234567890abcdef'
        curdir = os.getcwd()
        base_path = os.path.abspath(test_support.TESTFN) + '.getcwd'

        try:
            os.mkdir(base_path)
            os.chdir(base_path)
        except:
            self.skipTest("cannot create directory for testing")

        try:
            def _create_and_do_getcwd(dirname, current_path_length = 0):
                try:
                    os.mkdir(dirname)
                except:
                    self.skipTest("mkdir cannot create directory sufficiently "
                                  "deep for getcwd test")

                os.chdir(dirname)
                try:
                    os.getcwd()
                    if current_path_length < 4099:
                        _create_and_do_getcwd(dirname, current_path_length + len(dirname) + 1)
                except OSError as e:
                    expected_errno = errno.ENAMETOOLONG
                    # The following platforms have quirky getcwd()
                    # behaviour -- see issue 9185 and 15765 for
                    # more information.
                    quirky_platform = (
                        'sunos' in sys.platform or
                        'netbsd' in sys.platform or
                        'openbsd' in sys.platform
                    )
                    if quirky_platform:
                        expected_errno = errno.ERANGE
                    self.assertEqual(e.errno, expected_errno)
                finally:
                    os.chdir('..')
                    os.rmdir(dirname)

            _create_and_do_getcwd(dirname)

        finally:
            os.chdir(curdir)
            shutil.rmtree(base_path)