allow user of ConnectionPool to override default tedious version

README.md

@@ -19,6 +19,7 @@ Once the Tedious Connection object has been acquired, the tedious API can be use
 
 ```javascript
 var ConnectionPool = require('tedious-connection-pool');
+ConnectionPool.overrideTedious(require('tedious'));
 var Request = require('tedious').Request;
 
 var poolConfig = {
@@ -76,6 +77,9 @@ pool.drain();
 
 ## Class: ConnectionPool
 
+### ConnectionPool.overrideTedious(tedious)
+Create connections using specified tedious module rather than ConnectionPool's default version of tedious.
+
 ### new ConnectionPool(poolConfig, connectionConfig)
 
 * `poolConfig` {Object} the pool configuration object

lib/connection-pool.js

@@ -1,5 +1,5 @@
 'use strict';
-var Connection = require('tedious').Connection;
+var Connection = require('tedious').Connection; // load default tedious version
 var EventEmitter = require('events').EventEmitter;
 var util = require('util');
 
@@ -52,6 +52,11 @@ function ConnectionPool(poolConfig, connectionConfig) {
 
 util.inherits(ConnectionPool, EventEmitter);
 
+ConnectionPool.overrideTedious = function(tedious) {
+    Connection = tedious.Connection; // allow user of ConnectionPool to override default tedious version
+    return ConnectionPool;
+};
+
 var cid = 1;
 
 function createConnection(pooled) {