Object tests and lint review

[codecov[bot]]

Codecov Report

Attention: 12 lines in your changes are missing coverage. Please review.

Comparison is base (32e9b70) 56.07% compared to head (8c8a8a5) 63.38%.

Files	Patch %	Lines
src/object/mod.rs	57.14%	6 Missing :warning:
src/object/hierarchy.rs	97.16%	3 Missing :warning:
src/object/search/io.rs	96.00%	1 Missing :warning:
src/object/search/mod.rs	98.90%	1 Missing :warning:
src/strategies.rs	95.65%	1 Missing :warning:

Additional details and impacted files

```diff @@ Coverage Diff @@ ## master #76 +/- ## ========================================== + Coverage 56.07% 63.38% +7.31% ========================================== Files 31 41 +10 Lines 4544 4580 +36 ========================================== + Hits 2548 2903 +355 + Misses 1996 1677 -319 ``` | [Flag](https://app.codecov.io/gh/HadrienG2/hwlocality/pull/76/flags?src=pr&el=flags&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Hadrien+G.) | Coverage Δ | | |---|---|---| | [ubuntu-latest](https://app.codecov.io/gh/HadrienG2/hwlocality/pull/76/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Hadrien+G.) | `64.53% <94.64%> (+7.56%)` | :arrow_up: | | [windows-latest](https://app.codecov.io/gh/HadrienG2/hwlocality/pull/76/flags?src=pr&el=flag&utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Hadrien+G.) | `62.54% <95.47%> (+7.29%)` | :arrow_up: | Flags with carried forward coverage won't be shown. [Click here](https://docs.codecov.io/docs/carryforward-flags?utm_medium=referral&utm_source=github&utm_content=comment&utm_campaign=pr+comments&utm_term=Hadrien+G.#carryforward-flags-in-the-pull-request-comment) to find out more.

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