[FEATURE]: Integrate test mocking for hardware dependent unit tests

[evan-palmer]

Is your feature request related to a problem? Please describe

There are minimal test cases for methods that require hardware. This hardware dependency can be replaced with mocking.

Describe the solution you'd like

Extend the unit tests implemented by integrating unittest.mock to replace hardware dependency in tests.

Describe alternatives you've considered

Alternatively, a resource file could be loaded and utilized; however, this requires management of an additional log file and is not standard to software development.

Implementation Ideas

Utilize the unittest.mock interface for testing hardware dependent methods such as message handlers.

Additional context

• unittest.mock documentation