Feature/refactor test power sensor

[mgovers]

This ensures that code changes in #409 remain small, reviewable and isolated

I could still refactor even further, but I believe that we can do that at a later stage if needed. At least most of the near-identical code duplications are now removed

[sonarcloud]

Kudos, SonarCloud Quality Gate passed!   

0 Bugs
0 Vulnerabilities
0 Security Hotspots
0 Code Smells

No Coverage information
0.0% Duplication

[TonyXiang8787]

@mgovers So this is a direct PR to main and ready for review?

[petersalemink95]

Is it correct that there are more tests removed then added? Seems like you're testing less now

[mgovers]

@mgovers So this is a direct PR to main and ready for review?

yes indeed

Is it correct that there are more tests removed then added? Seems like you're testing less now

i combined the tests for power sensor on {Shunt, Load} as well as {Generator, Branch_from, Branch_to, Source}, because they were exactly the same (aside from typos in the comments). The way I tested this was by creating a for loop that loops over the terminal types for each of those sets, and then do a regex match on the full test case and i fixed the difference between the comments - and that worked as expected.