Add test coverage

[pjhartout]

This PR adds coverage to the codebase.

[pjhartout]

Authorization is pending to allow codecov access to the codebase for the code coverage badge.

[codecov[bot]]

Codecov Report

:exclamation: No coverage uploaded for pull request base (main@b10a430). Click here to learn what that means. Patch has no changes to coverable lines.

:exclamation: Current head e6a3dc7 differs from pull request most recent head 633a3d3. Consider uploading reports for the commit 633a3d3 to get more accurate results

Additional details and impacted files

```diff @@ Coverage Diff @@ ## main #148 +/- ## ======================================= Coverage ? 53.37% ======================================= Files ? 40 Lines ? 1422 Branches ? 0 ======================================= Hits ? 759 Misses ? 663 Partials ? 0 ``` | Flag | Coverage Δ | | |---|---|---| | pytest | `53.37% <0.00%> (?)` | | 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=BorgwardtLab#carryforward-flags-in-the-pull-request-comment) to find out more. 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=BorgwardtLab). 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=BorgwardtLab)

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