ruby on rails - RSpec mocking response attribute -

i'm stuck small issue can't seem find on rspec doc (or elsewhere). suspect it's because it's trying http call unsure.

i'm attempting mock response in controller, actual response coming straight aws-sdk (so it's external service).

controller:

response = {   snapshot_id: client.copy_snapshot({foo, bar}).snapshot_id }

is possible stub .snapshot_id?

_spec.rb

before   allow(client).to receive(:copy_snapshot).and_return('something')    put :update, format: :json   puts json.parse(response.body) end

the tests passes without adding .snapshot_id on controller page , can see

{"snapshot_id"=>"something"}

otherwise "this resource unavailable." adding in, i'm lost if i'm doing wrong or if intended behavior.

the reasoning when server on response back, omitting snapshot_id causes server hang amazon returns lot of data (headers, etc)

any appreciated.

Overvie