There isn't a predefined acceptance test for CWMS. However, I have recently done a few installs and can thoroughly (sometimes too much so) tested a number of aspects of the system. If you want to test failover behavior for media, the easiest way to do this is within vCenter by simply changing the vNIC configuration to shut off network access on the guest you want to fail. You can also shut down the individual VMs but just make sure you keep an eye on the system status from within the Admin dashboard as well as on the console of each host. Also remember that if you shut down the media servers that are used for the inbound trunks (what Cisco calls the Load Balancers) then you will be affecting inbound call capabilities.
Are you getting this error “Installer User Interface Mode Not Supported. The installer cannot run in this UI mode. To specify the interface mode, use the -i command-line option, followed by the UI mode identifier. The value UI mode identifiers...
The below trick might come handy when you have to add a new node to a cluster but you don't have or is unsure of the security password for the publisher. This procedure has been around for ages.
1) Login into the CLI of the Publisher.