def test_as_bytes_fragment_too_long(self):
"""
:py:func:`tls.record.TLSPlaintext` fails to construct a packet
with a longer-than-allowed fragment.
"""
plaintext = TLSPlaintext(type=enums.ContentType.HANDSHAKE,
version=ProtocolVersion(major=3, minor=3),
fragment=b'a' * 0xFFFF)
with pytest.raises(ValidationError) as exc_info:
plaintext.as_bytes()
assert exc_info.value.args == ('invalid object', 0xFFFF)
