rspecのテスト環境でdeviseにログインする方法【rails】 ref: http://qiita.com/Kohei_Kishimoto0214/items/e29e509b12a6eb484a42

controller_macros.rb

module ControllerMacros
  def login_admin(admin)
    @request.env["devise.mapping"] = Devise.mappings[:admin]
    sign_in admin
  end

  def login_user(user)
    controller.stub(:authenticate_user!).and_return true
    @request.env["devise.mapping"] = Devise.mappings[:user]
    sign_in user
  end
end

file0.txt

gem 'devise'
gem 'rspec-rails'
gem 'factory_girl_rails'
gem 'faker'
gem 'rails-controller-testing'

file1.txt

$ gem install rails-controller-testing

file2.txt

$ gem list con
=> rails-controller-testing (1.0.1)

file6.rb

# 記述なし
FactoryGirl.create(:user)

#記述あり
create(:user)

file7.rb

# 記述なし
FactoryGirl.create(:user)

#記述あり
create(:user)

message_controller.rb

  def index
    @groups = current_user.groups
  end

message_controller_spec.rb

require 'rails_helper'

describe MessagesController, type: :controller do
  let(:user) { create(:user) }
  # userをcreateし、let内に格納

  describe 'GET #index' do
    before do
      login_user user
      # controller_macros.rb内のlogin_userメソッドを呼び出し
    end

    it "renders the :index template" do
    end
end

rails_helper.rb

RSpec.configure do |config|
    config.include FactoryGirl::Syntax::Methods
end

user.rb

FactoryGirl.define do
  pass = Faker::Internet.password(8)

  factory :user do
    name                  Faker::Name.name
    email                 Faker::Internet.email
    password              pass
    password_confirmation pass
  end
end