post_controller_spec.rb

post_controller_spec.rb

require 'rails_helper'
include RandomData

RSpec.describe PostsController, type: :controller do
  let (:my_post) { Post.create(title: RandomData.random_sentence, body: RandomData.random_paragraph) }

  describe "GET #index" do
    it "returns http success" do
      get :index
      expect(response).to have_http_status(:success)
    end

    it "assigns my_post to @post" do
      get :index
      expect(assigns(:posts)).to eq([my_post])
    end
  end

  describe "GET new" do
    it "returns http success" do
      get :new
      expect(response).to have_http_status(:success)
    end

    it "renders the #new view" do
      get :new
      expect(response).to render_template :new
    end

    it "instantiates @post" do
      get :new
      expect(assigns(:post)).not_to be_nil
    end
  end

  describe "POST create" do
    it "increases the number of Post by 1" do
      expect{post :create, post: {title: RandomData.random_sentence, body: RandomData.random_paragraph}}.to change(Post,:count).by(1)
    end

    it "assigns the new post to @post" do
      post :create, post: {title: RandomData.random_sentence, body: RandomData.random_paragraph}
      expect(assigns(:post)).to eq Post.last
    end

    it "redirects to the new post" do
      post :create, post: {title: RandomData.random_sentence, body: RandomData.random_paragraph}
      expect(response).to redirect_to Post.last
    end
  end

end