database.js

var mongodb = require('mongodb');
var Db      = mongodb.Db;
var Server  = mongodb.Server;

module.exports = Database;

function Database(database_name, host, port) {
  this.client = new Db(database_name, new Server(host, port, {}));

  this.find = function(collection_name, params, callback) {
    this.client.collection(collection_name, function(err, collection) {
      collection.find(params, function(err, cursor) {
        cursor.toArray(function(err, results) {
          callback(results);
        });
      });
    });
  }
}

Database.prototype = new process.EventEmitter();

database_test.js

exports['connect'] = function(test){
  test.expect(0);

  var Database = require('database');
  var database = new Database('ubertest', '127.0.0.1', 27017);

  database.find('characters', {name:'Tobias'}, function(characters) {
    console.log(require('sys').inspect('callback', true, null));
    console.log(require('sys').inspect(characters, true, null));
  });

  test.done();
};