Rspec: Access a controller concern's methods in request specs - ruby-on-rails

Question

I have a controller concern defined as follows:
module Auth
extend ActiveSupport::Concern
private
def sign_in(user)
session[:customer_id] = user.id
self.current_user = user
end
def signed_in?
!current_user.nil?
end
...
# other methods
end
And this module is included in the ApplicationController:
class ApplicationController < ActionController::Base
include Auth
helper_method :signed_in?, :current_user, :current_user?
before_action :authorize
end
The questions I have:
should we really extend extend ActiveSupport::Concern in a concern? If so wy and when not?
how can I enable the concern module so that its methods could be re-used in RSpec request specs?
I tried to add the following in spec/support/utilities.rb:
include ApplicationHelper
include Auth
as well as required all the files from spec/support directory in rails_helper.rb and included the above modules:
# Require all the files in support directory
Dir[Rails.root.join('spec/support/**/*.rb')].each { |f| require f }
RSpec.configure do |config|
...
# include ApplicationHelper
config.include ApplicationHelper, type: :feature
config.include Auth, type: :request
...
end
Now, when running a requests/customers_spec.rb:
require 'rails_helper'
RSpec.describe "/customers", type: :request do
describe "GET /index" do
it "renders a successful response" do
customer = create(:customer)
sign_in(customer)
get customers_url
expect(response).to be_successful
end
end
...
it fails with:
Failures:
1) /customers GET /index renders a successful response
Failure/Error: session[:customer_id] = user.id
NoMethodError:
undefined method `session' for nil:NilClass
# ./app/controllers/concerns/auth.rb:7:in `sign_in'
# ./spec/requests/customers_spec.rb:10:in `block (3 levels) in <top (required)>'
What am I missing?
I'm using Rails 6.0.3, rspec-rails 4.0.1.

Answer 1

The solution I came to was to add the following method to the spec/support/login_macros.rb:
module LoginMacros
def sign_in_with_browser(user)
visit login_path
fill_in 'E-mail', with: user.email
fill_in 'Password', with: user.password
click_button 'Login'
end
def sign_out_with_browser
click_link 'Logout'
end
# to enable user authentication in request specs
def login_without_browser(user)
post login_url, params: { email: user.email, password: 'secret' }
end
end
Then test a protected end-point in the above request spec as follows:
describe "GET /index" do
it "renders a successful response" do
customer = create(:customer)
login_without_browser(customer)
get customers_url
expect(response).to be_successful
end
end