How to achieve acceptance testing through abstraction

Beaker is a Puppet testing harness focused on acceptance testing via interactions between multiple (virtual) machines. It provides platform abstraction between different Systems Under Test (SUTs), and it can also be used as a virtual machine provisioner setting up machines, running any commands on those machines, and then exiting. Recently, Vox Pupuli, a collective of Puppet community authors, has taken over responsibility to care and feed Beaker for its continued widespread community use.