auther.js

var autheremin = require('autheremin');
var http = require('http');
var port = process.argv[2] || 4824;

http.createServer(function (req, res) {
  res.writeHead(200, {'Content-Type': 'text/plain'});
  res.end('Hello World\n');
}).listen(port, '127.0.0.1');

console.log('Server running at http://127.0.0.1:' + port);

tests auther.js

var assert = require("assert");
var request = require("request");

describe('auther', function () {
  var auther = require("../auther");

  it('exists', function () {

    it('should not be null', function () {
      assert.notEqual(auther, null);
    });

    it('should not be undefined', function () {
      assert.notEqual(auther, undefined);
    });
  });

  it('starts a server that listens on port 4824 by default', function () {
    request('http://localhost:4824', function(err, resp, body) {
      assert(resp.statusCode === 200);
    });
  });


  //when we send a put request to localhost/some_username with a request body contaning a password and an api key, author will return 200 ok
  it('returns 200 when we send a PUT request to localhost/someUser', function () {
    // start up auther server
    // form the request
    // send the request
    // get the response
    // response body should be 200
  });
});

Trace

$ mocha tests/auther.js 

fs.js:400
  return binding.readdir(pathModule._makeLong(path));
                 ^
Error: ENOTDIR, not a directory 'tests/auther.js'
    at Object.readdirSync (fs.js:400:18)
    at lookupFiles (/usr/local/lib/node_modules/mocha/bin/_mocha:396:6)
    at /usr/local/lib/node_modules/mocha/bin/_mocha:241:24
    at Array.forEach (native)
    at Object.<anonymous> (/usr/local/lib/node_modules/mocha/bin/_mocha:240:6)
    at Module._compile (module.js:446:26)
    at Object..js (module.js:464:10)
    at Module.load (module.js:353:31)
    at Function._load (module.js:311:12)
    at Array.0 (module.js:484:10)
    at EventEmitter._tickCallback (node.js:190:38)