railsware/rack_session_access

gem install rack_session_access

gem 'rack_session_access'

[MyRailsApp]::Application.configure do |config|
  ...
  # Access to rack session
  config.middleware.use RackSessionAccess::Middleware
  ...
end

class MySinatraApplication < Sinatra::Base
  enable :sessions
  use RackSessionAccess::Middleware if environment == :test
  ...
end

MySinatraApplication.configure do |app|
  app.use RackSessionAccess::Middleware
end

Rack::Builder.new do
  ...
  use Rack::Session::Cookie
  use RackSessionAccess::Middleware
  use MyRackApplication
end.to_app

require "rack_session_access/capybara"

require 'spec_helper'

feature "My feature" do
  given!(:user) { create(:user, email: '[email protected]') }

  scenario "logged in user access profile page" do
    page.set_rack_session(user_id: user.id)
    visit "/profile"
    expect(page).to have_content("Hi, [email protected]")
  end

  scenario "visit landing page" do
    visit "/landing?ref=123"
    expect(page.get_rack_session_key('ref')).to eq("123")
  end
end

module FeatureHelpers
  def logged_as(user)
    page.set_rack_session('user_credentials' => user.persistence_token)
  end
end

module FeatureHelpers
  def logged_as(user)
    # Devise v3.x.x
    page.set_rack_session('warden.user.user.key' => User.serialize_into_session(user).unshift('User'))

    # Devise v4.x.x
    page.set_rack_session('warden.user.user.key' => User.serialize_into_session(user))
  end
end

RSpec.configure do |config|
  ...
  config.include FeatureHelpers, type: :feature
  ...
end

feature 'User dashboard', type: :feature do
  given(:user) { create(:user) }
  background do
    logged_as user
  end
  scenario 'User reviews a dashboard' do
    ...
  end
end

BUNDLE_GEMFILE=Gemfile.rails4 bundle install
BUNDLE_GEMFILE=Gemfile.rails4 bundle exec rspec -fd spec/

BUNDLE_GEMFILE=Gemfile.rails5 bundle install
BUNDLE_GEMFILE=Gemfile.rails5 bundle exec rspec -fd spec/