test: improve coverage of computed object

[codecov[bot]]

Codecov Report

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

Comparison is base (ba22a78) 31.92% compared to head (7e5ddfa) 32.02%. Report is 3 commits behind head on main.

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #174 +/- ## ========================================== + Coverage 31.92% 32.02% +0.10% ========================================== Files 53 53 Lines 2938 2938 Branches 298 298 ========================================== + Hits 938 941 +3 + Misses 1995 1993 -2 + Partials 5 4 -1 ```

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