Make tests functional

# 💡 Summary #

In #63 I commented out most of the tests because the container as it stands does not support them. The container should be altered to support these tests, at which point they should be uncommented again.

## Motivation and context ##

Containers should undergo some testing as a part of the CI process.

## Acceptance criteria ##

- [ ] All possible tests are supported by the container, and passing in GitHub Actions.

Review issue #63 and the tests it left commented out, then inspect the container configuration and GitHub Actions setup. Identify which tests the container can support, restore those tests, and confirm that all supported tests pass in GitHub Actions.

Written by the indexing model from the issue text.