test_struct.py 文件源码

def test_trailing_counter(self):
        store = array.array('b', b' '*100)

        # format lists containing only count spec should result in an error
        self.assertRaises(struct.error, struct.pack, '12345')
        self.assertRaises(struct.error, struct.unpack, '12345', '')
        self.assertRaises(struct.error, struct.pack_into, '12345', store, 0)
        self.assertRaises(struct.error, struct.unpack_from, '12345', store, 0)

        # Format lists with trailing count spec should result in an error
        self.assertRaises(struct.error, struct.pack, 'c12345', 'x')
        self.assertRaises(struct.error, struct.unpack, 'c12345', 'x')
        self.assertRaises(struct.error, struct.pack_into, 'c12345', store, 0,
                           'x')
        self.assertRaises(struct.error, struct.unpack_from, 'c12345', store,
                           0)

        # Mixed format tests
        self.assertRaises(struct.error, struct.pack, '14s42', 'spam and eggs')
        self.assertRaises(struct.error, struct.unpack, '14s42',
                          'spam and eggs')
        self.assertRaises(struct.error, struct.pack_into, '14s42', store, 0,
                          'spam and eggs')
        self.assertRaises(struct.error, struct.unpack_from, '14s42', store, 0)