Too something to fail.

gistfile1.js

var upnode = require('../');
var dnode = require('dnode');
var test = require('tap').test;
var net = require('net');

test('simple', function (t) {
    t.plan(1);

    var port = Math.floor(Math.random() * 5e4 + 1e4);
    var up = upnode.connect(port);
    on();

    up.on('up', function () { 
      t.throws(function(){
        throw new Error('yay');
      }, new Error('yay'), 'Thrown error did not match'); // This succeeds even without my added code
      off();
      up.close();
      t.end();
    });

    var server, ds;
    function on () {
        server = net.createServer(function (stream) {
            ds = dnode(function (client, conn) {
                this.time = function (cb) { cb(Date.now()) };
                this.ping = function (cb) { cb() };
            });
            ds.pipe(stream).pipe(ds);
        });
        server.listen(port);
    }
    
    function off () {
        ds.end();
        server.close();
    }
});