Writing tests for promises in jasmine is kind of a pain in the ass.
jasmine-pit makes doing such things a tiny bit easier by providing an augmented
pit()) that allows you to simply return a promise that may eventually
assert expect()s (or propogate errors).
This will execute the promise chain and, if any errors occur along the way, they will be propogated up to jasmine and reported as normal.
Don't be afraid to take a look at the source. The definition for
pit() is stupid