Chutzpah only supports generating code coverage when run directly on a .js/.ts/.coffee file. When you run Chutzpah on a test harness it tells it to just use what you gave it.
Chutzpah should work fine on your .js though so if you provide more info I can help diagnose that further.
Chutzpah should work fine on your .js though so if you provide more info I can help diagnose that further.