To run a file's tests from the command line, run the following
your/file.pl with the path to your file.
swipl -g run_tests -t halt your/file.pl
Prolog will (1) load the file you specify, as well as any modules it depends on; (2) run all tests in those files, and (3) exit with status 0 or 1 depending on whether the test suite succeeds or fails.
If you want to test multiple files, you can pass multiple