Create tests for templates

[ApusBerliozi]

We need to add tests for templates, however there are several issues that I can see:

1 - Testing process could take a long time, cause training model ain't fast
2 - I don't really understand how to test CUDA stuff
3 - I'm a bit confused with defining expectation for each result

[DagaBhai]

assign this to me

[blkdmr]

Please notice that those test should be launched on every fenn release creation (in the best scenario)