I've been asked this question several times, so I thought it might be worth blogging it.
You are probably aware that a load balancer is required if you need your Symantec Workspace Streaming environment to be highly available, scalable, robust and all that good stuff. Now, when you do setup a load balancer, you need to make sure it has been setup correctly with all the necessary configurations implemented the way you intended it to be. Check out the connect article where it talks about configuring load balancer with Symantec Workspace Streaming.
After you think you have configured it all well, the moment of truth is when the users use. Or should that be the moment of truth? To avoid any escalations and embarassment, ideally you should test these configurations. Ideally, the following 5 functionalities should be tested.
Health check of the nodes...