[RUBY] How to write an RSpec controller test

Premise

・ Devise is introduced ・ About the contents of the test written this time -If the user is logged in, it should be displayed correctly.

`app/controllers/posts_controller.rb`


  class PostsController < ApplicationController
    before_action: authenticate_user!

    def index
      @posts = Post.all
    end
  end

About file creation / role

① Create requests and factories folders under spec

-Create spec/requests/posts_request.rb → File that describes the contents of the test

・ Spec/factories/user.rb ・ Create spec/factories/post.rb → File to create dummy data about user and post

(2) Create a support folder and factory_bot.rb file under spec so that FactoryBot can be used.

`spec/support/factroy_bot.rb`


RSpec.configure do |config|
  config.include FactoryBot::Syntax::Method #For FactoryBot
  config.include Devise::Test::IntegrationHelper, type: :request #devise sign_in method becomes available
end

Then edit rails_helper.rb

`spec/rails_helper.rb`


require 'spec_helper'
...
require 'rspec/rails'
require 'support/factroy_bot'  #← This description allows you to use FactroyBot

Creating dummy data

`spec/factories/user.rb`


FactoryBot.define do
  factory :user do 
    email { Faker::Internet.email }
    name { "testuser1" }
    password { "password" }
    password_confirmation { "password" }
  end 
end

`spec/factories/post.rb`


FactroyBot.defind do
  factory :post do
    body { Faker::Lorem.charactors(number: 15) } #Create a 15-character dummy statement
  end
end

Creating test code

`spec/requests/post_spec.rb`


require 'rails_helper'

RSpec.describe 'post_controller test', type: :request do
  let(:user) { create(:user) }
  let(:post) { create(:post) }
  describe 'If you are logged in' do
    before do
      sign_in user
      get posts_path
    end

    it 'Requests to the post list page should be 200 ok' do
      expect(response.status).to eq 200
    end

    it 'The page title is displayed correctly' do
      expect(response.body).to include('Post list')
    end
  end

  describe "If you are not logged in" do
    before do 
      get posts_path
    end
    
   it 'The request will be 401' do
     expect(response.status).to eq 401
   end
  
   it 'Title is not displayed' do
     expect(response.body).to_not include("Post list")
   end
  end
end

All you have to do is run RSpec!

$ rspec spec/requests

Finally###

Since this is a beginner's article, I think there are ninety-nine mistakes. If anyone notices it, I would be very grateful if you could let me know! ！