How do i validate that my load balancers are properly working within my ADFS and ADFS Proxy farm?

I set up ADFS farm including 2 data centers. In each data center, I have one internal network and one DMZ. There are two ADFS Server Proxies in DMZ deployed with LTM (load balancer). Internal network has two ADFS servers also deployed with LTM in between them. Two data centers are connected with NeuStar Load balancing service.

My question is, how do I test load balancers.

Thanks a million

NerkoIT