test_streams.py 文件源码

def test_seeking_from_end_beyond_beginning(self):
        with EncodedFile(io.BytesIO(COMPRESSED)) as fp:
            # Go to end to get size
            size = fp.seek(0, io.SEEK_END)
            # Go to beginning
            self.assertNotRaises(fp.seek, -size, io.SEEK_END)
            # One before beginning
            self.assertRaises(IOError, fp.seek, -size - 1, io.SEEK_END)