describe('Access to DB', function(){
   describe('#fail', function(){
        it('should return -1 because wrong credentials', function(){
            var connection = mysql.createConnection({
                host: 'right host',
                user: 'wrong user',
                password: 'wrong password',
                database: 'right database'
            });
            connection.connect(function(err){
                assert.equal(7,err.stack.indexOf("ER_ACCESS_DENIED_ERROR"));
            });
        });
    })
});