Rspec，Rails：如何测试控制器的私有方法

# Rspec 和 Rails：测试控制器私有方法的技巧

ruby
rails generate rspec:install

ruby
# app/controllers/posts_controller.rb
class PostsController < ApplicationController
  before_action :authenticate_user
  before_action :find_post, only: [:show, :edit, :update, :destroy]
  def show
    # 公共方法的实现
  end
  # 其他公共方法
  private
  def find_post
    @post = Post.find(params[:id])
  end
end

ruby
# spec/controllers/posts_controller_spec.rb
require 'rails_helper'
RSpec.describe PostsController, type: :controller do
  describe 'private method #find_post' do
    it 'finds the post' do
      post = create(:post) # 使用FactoryBot创建一个Post对象
      controller.send(:find_post) # 调用私有方法
      expect(assigns(:post)).to eq(post)
    end
  end
end

ruby
bundle exec rspec spec/controllers/posts_controller_spec.rb