To test UEFI GetVariable(), FWTS needs the SetVariable() service to be supported.

This limitation of the test method prevents testing UEFI Variables at all on some systems (e.g. U-Boot based, where variables are r/o at runtime in some configurations).

It would be nice to add a minimal, read-only test for the UEFI variables in FWTS.

Some UEFI Variables commonly found on those smaller systems, such as OsIndicationsSupported could be leveraged for testing.