Improve unit testing by allowing different types of operanders

[cicr99]

Currenty the testing structure we have creates Deref structs for the operanders we pass. This is consistent with ResOperanders, but if you would need a CellRef to be passed to the constructor it wouldn't be possible. It would be good to modify it as to allow us to pass the operander we need

[ebukizy1]

can i be assign this.. will love to work on it.

[TAdev0]

hi @ebukizy1 sorry for the late answer. This issue was not opened to external contributors. thanks for your interest though

[TAdev0]

@cicr99 still thinking about the best way to achieve this