test.js

var redis              = require('redis');
/* ENvironment variables */

/*
/**/
var dbhost = process.env.DBHOST;
var dbport = process.env.DBPORT;
var dbpass = process.env.DBPASSWORD;
/**/
/* / end environment variables */

var redisClient = redis.createClient(dbport, dbhost);
if (typeof(dbpass) !== 'undefined') {
	redisClient.auth(dbpass, function (err, data) {
		redisClient.select('0',function(err, data) {
			doTest();
		});
	});
} else {
	doTest();
}

function doTest() {

	var bit = [];
	for (i=0;i<300;i++) {
		bit.push(i);
	}
	var multi = redisClient.multi();
	multi.incr('test');
	multi.sadd('user:fb:test:friends', bit);
	multi.exec(function(err, replies) {
		// Should check this works.
		// console.log(err); // null
		// console.log(replies); // [1, 300] or [n, 0] --- depending on the number of times you launch this
		redisClient.smembers('user:fb:test:friends', function(err, data) {
			if (data[data.length-1] === null) {
				console.error("KO");
			} else {
				console.log("OK");
			}
			
			
			//console.log("Length: "+data.length); // output 300
			redisClient.end();
		});
	});




}