Resolved context unit testing

[BryceGattis]

This PR adds some more unit testing coverage for resolved_context.py

TODO:

• There's one ResolvedContext.Callback test that's failing because I can't seem to get the mocking to work as I expect.

[JeanChristopheMorinPerso]

Rebased in order to display the coverage information even if tests fail.

[codecov[bot]]

Codecov Report

All modified and coverable lines are covered by tests :white_check_mark:

Project coverage is 58.48%. Comparing base (a13f7bb) to head (234e0ea).

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #1749 +/- ## ========================================== + Coverage 58.41% 58.48% +0.06% ========================================== Files 126 126 Lines 17163 17163 Branches 3506 3506 ========================================== + Hits 10025 10037 +12 + Misses 6473 6462 -11 + Partials 665 664 -1 ```

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[JeanChristopheMorinPerso]

Sorry for the noise. I had to fix the coverage report... It should work now.