Rspec GET to a different endpoint for a second - ActionController::UrlGenerationError

Question

In my Grape/Rails app I've implement maintenance mode in ApplicationController so when this mode is active it will redirect to the maintenance_mode_path from anywhere in the app. How to force rspec to be in a different endpoint for a while eg. api/v1/new_endpoint while the whole test takes place in the MaintenanceModeController ?

maintenance_mode_controller_spec

context 'when maintenance mode is active' do

  context 'when current page is not maintenance page' do
    let(:call_endpoint) { get('/api/v1/new_endpoint') }

    it 'redirect to the maintenance page' do
      call_endpoint
      expect(response).to have_http_status(:redirect)
    end
  end
end

But with code above I've got an error

Failure/Error: let(:call_endpoint) { get('/api/v1/bank_partners') }

ActionController::UrlGenerationError: No route matches {:action=>"/api/v1/new_endpoint", :controller=>"maintenance_mode"}

max · Answer 1 · 2019-11-19T16:18:07.100

You can't really test this at all with a controller spec. Controller specs create a instance of a controller with a mocked request which you then run tests on. When you call for example get :show in a controller test you are actually calling the #show method on your mocked controller. Since it does not actually create a HTTP request so there is no way for it to actually interact with the other controllers in the system.

Use a request spec instead:

# /spec/requests/maintainence_mode_spec.rb
require "rails_helper"

RSpec.describe "Maintenance mode", type: :request do
  context 'when maintenance mode is active' do
    context 'when current page is not maintenance page' do
      let(:call_endpoint) { get('/api/v1/new_endpoint') }
      it 'redirects to the maintenance page' do
        call_endpoint
        expect(response).to redirect_to('/somewhere')
      end
    end
  end
end

Request specs provide a high-level alternative to controller specs. In fact, as of RSpec 3.5, both the Rails and RSpec teams discourage directly testing controllers in favor of functional tests like request specs.

Rspec GET to a different endpoint for a second - ActionController::UrlGenerationError

1 Answers1