test_fileio.py 文件源码

def test_surrogates(self):
        # Issue #8438: try to open a filename containing surrogates.
        # It should either fail because the file doesn't exist or the filename
        # can't be represented using the filesystem encoding, but not because
        # of a LookupError for the error handler "surrogateescape".
        filename = u'\udc80.txt'
        try:
            with _FileIO(filename):
                pass
        except (UnicodeEncodeError, IOError):
            pass
        # Spawn a separate Python process with a different "file system
        # default encoding", to exercise this further.
        env = dict(os.environ)
        env[b'LC_CTYPE'] = b'C'
        _, out = run_python('-c', 'import _io; _io.FileIO(%r)' % filename, env=env)
        if ('UnicodeEncodeError' not in out and not
                ( ('IOError: [Errno 2] No such file or directory' in out) or
                  ('IOError: [Errno 22] Invalid argument' in out) ) ):
            self.fail('Bad output: %r' % out)