Fix unit tests for Windows systems

Currently the unit tests will all pass only for Linux based systems, and there are 12 failures when running them on Windows. These tests should be changed to be platform agnostic. I suspect it will be something related to file paths / file systems.

Start by running the unit test suite on Windows and record the 12 failures. Inspect each failing test for assumptions about file paths or filesystem behavior, then compare results on Linux. Done means the unit tests pass on both platforms without platform-specific exceptions.

Written by the indexing model from the issue text.