forms_controller_test.rb

require "test_helper"

describe FormsController, "#show" do
  extend CitizenHelper
  
  def setup
    Form.delete_all
    Question.delete_all
    @form = create :active_form
  end

  redirect_to_login do
    instance_variables.include? :@form # => false
    get :show, id: @form.id 
  end
  
  test "should be successful if the form is active" do
    instance_variables.include? :@form # => true
  end
end

test_helper.rb

module CitizenHelper
  module SetupModule
    def after_setup
      @request.env["devise.mapping"] = Devise.mappings[:citizen]
      @citizen = Citizen.first || create(:citizen)
      @citizen.confirm! # important!!!!
      sign_in @citizen
      super
    end
  end
  
  class MiniTest::Unit::TestCase
    include SetupModule
  end

  def redirect_to_login
    test "not logged in user should be directed to login page" do
      sign_out @citizen
      yield
      assert_redirected_to new_citizen_session_path
      refute_empty flash[:alert]
    end
  end
end