How do you test broken paths?

[awei01]

Hi, this module works well with happy paths, but I can't seem to test broken paths.

My lambda calls an external service. I mock the service to throw an error and then handle the error within my code. However, these lines (https://github.com/lucasconstantino/now-we-test/blob/master/lib/simulator.js#L56-L69) seem to capture the thrown error and not let my lambda handle the error.

Any insight would be appreciated.