CODEWITHSUNDEEP
ruby-on-railswebsocketcapybaraminitest
Chapman Atwell
Chapman Atwell

Reputation: 1197

In Rails, how can I stub a websocket message for a test?

The application is using Minitest on Rails 4 with Capybara.

I'd like to write an integration or feature test that stubs a websocket connection (the application uses Faye as a client) to return a specific message (like I'm used to doing with Webmock).

Is this possible? If so, can you provide an example? My research has not turned up any examples.

Upvotes: 2

Views: 887

Answers (1)

Thomas Walpole
Thomas Walpole

Reputation: 49950

Your research hasn't shown up any examples because it's not really what you're supposed to be doing in feature tests. Feature tests are supposed to be end-to-end black box tests where you configure the data as required for the app to generate the desired results and then all interaction is done via the browser (no mocking/stubbing which technically alter your apps code). Additionally when connections between the browser and a 3rd party service are involved there is nowhere in your app where you can mock it.

It may be possible to stub a websocket connection from the browser with a programmable proxy like puffing-billy, however it's generally cleaner to produce a small fake version of the 3rd party service for testing purposes (sinatra app, etc) and point the browser at that rather than the original service when you need to craft custom responses. Additionally, there are a lot of fakes already out there, depending on what service you are using (fake-stripe, fake-s3, etc), which may provide the functionality you're looking for.

Upvotes: 1

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