demarches-normaliennes/spec/support/controller_helpers.rb

module ControllerHelpers
  def sign_in(user = double('test@localhost.com'))
    if user.nil?
      allow(request.env['warden']).to receive(:authenticate!).and_throw(:warden, scope: :user)
      allow(controller).to receive(:current_user).and_return(nil)
    else
      allow(request.env['warden']).to receive(:authenticate!).and_return(user)
      allow(controller).to receive(:current_user).and_return(create(:user))
    end
  end
end

RSpec.configure do |config|
  config.include Devise::TestHelpers, type: :controller
  config.include ControllerHelpers, type: :controller
end