async def METHOD_NAME(self):
    request_context = RequestContext.test_context()
    request_context.message_receipt = MessageReceipt()
    request_context.connection_record = async_mock.MagicMock()
    with async_mock.patch.object(
        test_module, "V20CredManager", autospec=True
    ) as mock_cred_mgr:
        mock_cred_mgr.return_value.receive_offer = async_mock.CoroutineMock()
        request_context.message = V20CredOffer()
        request_context.connection_ready = False
        handler_inst = test_module.V20CredOfferHandler()
        responder = MockResponder()
        with self.assertRaises(test_module.HandlerException) as err:
            await handler_inst.handle(request_context, responder)
        assert (
            err.exception.message
            == "Connection used for credential offer not ready"
        )
    assert not responder.messages