I think that it is more likely this line that it is having trouble with.
#include <ArduinoUnit.h>
The compiler can't find that file. Where is that file located?
From:
These files require the library ArduinoUnit which can be downloaded here: GitHub - mmurdoch/arduinounit: ArduinoUnit is a unit testing framework for Arduino libraries
The linked page (GitHub - mmurdoch/arduinounit: ArduinoUnit is a unit testing framework for Arduino libraries) has installation instructions.