def test__read_to_exception(self):
decoder = Decoder(b'a:bcdef')
decoder.idx = 3
with self.assertRaises(DecodingError):
decoder._Decoder__read_to(b':')
def test__read_to(self):
decoder = Decoder(b'abc:def')
decoder.idx = 0
b = decoder._Decoder__read_to(b':')
self.assertEqual(b, b'abc', msg='__read_to(b) failed to copy the correct bytes.')
