Test TODOs

- [ ] Rewrite tests in a cross-compatible way
- [ ] Should testing files be included or created on the fly?
- [ ] If they are to be included, where should they go (in example folder?)
- [ ] Symlink test files will probably need to be made during test run
- Symlinks created on Mac will probably not work on windows. This then brings forward the question: "Should tests just generate all the files using Rust code to avoid any cross-compatible issues?"
- [ ] Run tests on Windows and Linux
- [ ] Implementation
- [ ] Write test(s) for the order_by size functionality
- [ ] Cleanup
- [ ] It is possible this `to_vec_test()` can be deleted, since `to_vec()` is being tested implicitly in all of the other tests
- [ ] Refactor tests
- [ ] Remove / reduce as many of the unwraps() in tests as possible (refactoring will help)