Rails newからの爆速Rspec導入

Rspecの導入

新規アプリ作成

$ rails _5.2.3_ new sample-app -d postgresql --skip-bundle && cd sample-app

不要なファイルが生成されないように設定

config/application.rb

module SampleApp
  class Application < Rails::Application
    # ここから下を追加(scaffold対策)
    config.generators do |g|
      g.javascripts false
      g.helper false
      g.test_framework false
      g.test_framework :rspec,
      fixtures: true,
      view_specs: false,
      helper_specs: false,
      routing_specs: false,
      controller_specs: false,
      request_specs: false
      g.fixture_replacement :factory_bot, dir: "spec/factories"
    end
  end
end

Rspecで必要なGemの追加

Gemfile

group :development, :test do
  # 追加
  gem 'rspec-rails'
  gem 'factory_bot_rails'
end

group :test do
  # 追加
  gem 'capybara'
  gem 'selenium-webdriver'
end

bundleから諸々のフォルダ作成、SystemrSpecとFactoryBotの導入

bundle install、scaffold、db:migrate、rspec generate、factorybot generate、systemフォルダ作成、post_spec.rbファイル作成を一発で！

$ bundle install --path vendor/bundle && rails db:create && rails g scaffold post title:string detaile:string && rails db:migrate && rails g rspec:install && mkdir spec/system && touch spec/system/post_spec.rb

chromedriverを入れてない方はこちら

$ brew install chromedriver && brew upgrade chromedriver

task_spec.rb例文)

spec/system/post_spec.rb

require 'rails_helper'

RSpec.describe 'MyString', type: :system do
  before do
    FactoryBot.create(:post)
    @posts = Post.all.order(created_at: :desc)
  end

  describe 'xxxxxxxxxx' do
    context 'xxxxxxxxxx' do
      FactoryBot.create(:post)
      it 'xxxxxxxxxx' do
        visit posts_path

        expect(page).to have_content 'MyString'
      end
    end
  end
end

factories例文)

spec/factories/posts.rb

FactoryBot.define do
  factory :post do
    title { "MyString" }
    detaile { "MyString" }
  end
end

rspecテストを実行

$ bundle exec rspec ./spec/system/post_spec.rb

参考にした記事
https://qiita.com/jnchito/items/c7e6e7abf83598a6516d
https://qiita.com/naoki_mochizuki/items/1d3026a32786642fc762