Is possible to do automatic regression testing on OSM Data?
For example, testing routes by doing test cases that set the start and end point, and expect the route to be within some buffer, and warning if the route calculated on the new data is out of the buffer.
Of course this should be possible, because OSM data is just pure data.
But as far as I know there is no such test framework yet.
If you want to try to build up such a system on your own based on routing, have a closer look at http://wiki.openstreetmap.org/wiki/Routing (links to many opensource projects) and http://wiki.openstreetmap.org/wiki/Quality_Assurance