async def METHOD_NAME(self):
    request_context = RequestContext.test_context()
    request_context.message_receipt = MessageReceipt()
    request_context.message = V20CredProposal()
    handler_inst = test_module.V20CredProposalHandler()
    responder = MockResponder()
    with self.assertRaises(test_module.HandlerException) as err:
        await handler_inst.handle(request_context, responder)
    assert (
        err.exception.message
        == "Connectionless not supported for credential proposal"
    )
    assert not responder.messages