Rails + Devise + RSpec = ❤️

devise.rb

# spec/support/devise.rb

module DeviseFeatureHelpers
  def sign_in(user = nil, scope = :user)
    user ||= build_stubbed :user
    login_as user, scope: scope
  end
end

RSpec.configure do |config|
  # feature specs
  config.include Warden::Test::Helpers, type: :feature
  config.include DeviseFeatureHelpers, type: :feature
  config.before(:suite) { Warden.test_mode! }
  config.after(:each) { Warden.test_reset! }

  # controller specs
  config.include Devise::TestHelpers, type: :controller
end