test_struct.py 文件源码

def test_construct(self):
        def _check_iterator(it):
            self.assertIsInstance(it, abc.Iterator)
            self.assertIsInstance(it, abc.Iterable)
        s = struct.Struct('>ibcp')
        it = s.iter_unpack(b"")
        _check_iterator(it)
        it = s.iter_unpack(b"1234567")
        _check_iterator(it)
        # Wrong bytes length
        with self.assertRaises(struct.error):
            s.iter_unpack(b"123456")
        with self.assertRaises(struct.error):
            s.iter_unpack(b"12345678")
        # Zero-length struct
        s = struct.Struct('>')
        with self.assertRaises(struct.error):
            s.iter_unpack(b"")
        with self.assertRaises(struct.error):
            s.iter_unpack(b"12")