Fix base hook unit tests assertions

[codecov[bot]]

Codecov Report

Base: 97.71% // Head: 97.96% // Increases project coverage by +0.24% :tada:

Coverage data is based on head (fdf2d05) compared to base (ccd52a7). Patch coverage: 100.00% of modified lines in pull request are covered.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #32 +/- ## ========================================== + Coverage 97.71% 97.96% +0.24% ========================================== Files 44 44 Lines 788 785 -3 ========================================== - Hits 770 769 -1 + Misses 18 16 -2 ``` | [Impacted Files](https://codecov.io/gh/willeagren/gromp/pull/32?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Wilhelm+%C3%85gren) | Coverage Δ | | |---|---|---| | [tests/hook/base.py](https://codecov.io/gh/willeagren/gromp/pull/32?src=pr&el=tree&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Wilhelm+%C3%85gren#diff-dGVzdHMvaG9vay9iYXNlLnB5) | `100.00% <100.00%> (+4.87%)` | :arrow_up: | Help us with your feedback. Take ten seconds to tell us [how you rate us](https://about.codecov.io/nps?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Wilhelm+%C3%85gren). Have a feature suggestion? [Share it here.](https://app.codecov.io/gh/feedback/?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Wilhelm+%C3%85gren)

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