CODEWITHSUNDEEP
ruby-on-railsunit-testingrspecinstance-variablesstub
YoloSnake
YoloSnake

Reputation: 163

RSpec-Rails - stub a controller variable

I have a controller action I want to test:

LOG = ApiRequest::Resource::Login

def create
    @response = LOG.new(current_user, params: params).create
    return if request_failed?
    ...
end

def request_failed?
    if @response.is_a? Hash
      false
    else
      error = @response
      redirect_to new_login_path, alert: error
      true
    end
  end

LOG.new(current_user, params: params).create is an external api call that normally returns either a hash or a string with the error. I want to test the controller action without triggering the call, like force @response = {} and check if it doesn't redirect and force @response = "" which should trigger a redirect.

it 'redirects if fails the request' do
    post :create
    expect(response).to redirect_to new_login_path
    expect(flash[:alert]).not_to be nil
end

How can you stub an instance variable?

Upvotes: 1

Views: 813

Answers (1)

Ilya
Ilya

Reputation: 13477

I would test it with stubbing LOG instance, something like:

let(:log_instance) { instance_double(LOG) }

before do
  allow(LOG).to receive(:new).and_return(log_instance)
  allow(log_instance).to receive(:create).and_return({})
end

Upvotes: 2

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