connection.js

var net = require('net');
var limestone = require('../limestone');

exports.testConnection = function () {
    // fire up listener
    var finx = net.createServer(function(){
        console.log('got connection on port 9313')
    });
    finx.listen(9313, function(){
        limestone.connect(9313, function(err) {
            assert.isNull(err, 'Got connection');
        });
        limestone.disconnect();
    });
};

output.txt

dawnrider:limestone sivy$ expresso 
got connection on port 9313

   uncaught: Error: Stream.end() called already; cannot write.
    at Stream.write (net:650:13)
    at Stream.<anonymous> (/Users/sivy/Documents/PROJECTS/Personal/sphinxbox/node/limestone/limestone.js:115:29)
    at Stream.emit (events:27:15)
    at IOWatcher.<anonymous> (net:855:16)
    at node.js:772:9

OH MY GOD 11 YEARS AGO AND I'M STILL LOOKING FOR THIS PROBLEM