Invokation:
$ casperjs --includes=included_script.js test main_test_script.js
Output:
Test file: main_test_script.js
plop
PASS Page title is "Google"
PASS 1 tests executed, 1 passed, 0 failed.
I'm using CasperJS v0.6.10 and PhantomJS v1.5.0, which is what
brew
installed for me a few days ago. I'm using Mac OS Lion.