Filters
Akephalos allows you to filter requests originating from the browser and return mock responses. This will let you easily filter requests for external resources when running your tests, such as Facebook's API and Google Analytics.
Configuring filters in akephalos should be familiar to anyone who has used
FakeWeb or a similar library. The simplest filter requires only an
HTTP method (:get, :post, :put, :delete, :any) and a
string or regex to match against.
By default, all filtered requests will return an empty body with a 200 status code. You can change this by passing additional options to your filter call.
And that's really all there is to it! It should be fairly trivial to set up filters for the external resources you need to fake. For reference, however, here's what we ended up using for our external sources.
Google Analytics
Google Analytics code is passively applied based on HTML comments, so simply returning an empty response body is enough to disable it without errors.
Facebook Connect
When you enable Facebook Connect on your page, the FeatureLoader is requested, and then additional resources are loaded when you call FB_RequireFeatures. We can therefore return an empty function from our filter to disable all Facebook Connect code.
Google Maps
Google Maps requires the most extensive amount of API definitions of the three, but these few lines cover everything we've encountered so far.