Ruby on Rails - TDD在测试时测试错误

Question

我回头努力学习TDD测试。我正在编写一个教程，希望我创建将与主题相关的SponsoredPosts。

我对TDD测试颇为陌生，所以打了一下呃。

我还没有创建一个控制器或模型，包含两个单词“赞助”“帖子”，所以我不知道处理它们时的协议，所以我会为您提供一切，我认为是相关的话希望你能告诉我我哪里出错了。我相信我只是将模型和控制器的名称混淆在一起，因为在我的模式文件中可以看到“sponsor_posts”表的属性为“topic_id”。我承认，我不是最擅长命名模型或控制器的人员，因为他们知道如何处理这些模型或控制器，所以您还可以提供任何解释来进一步帮助我理解在命名它们时出错的位置非常有帮助。

这里是我的Sponsored_Posts_Controller_Spec：

require 'rails_helper' 
include RandomData 

RSpec.describe SponsoredPostsController, type: :controller do 

    let (:my_topic) { Topic.create!(name: RandomData.random_sentence, description: RandomData.random_paragraph) } 
    let (:my_sponsored_post) { my_topic.sponsored_posts.create!(title: RandomData.random_sentence, body: RandomData.random_paragraph, price: 6) } 

    describe "GET show" do 

    it "returns http success" do 
     get :show, topic_id: my_topic.id, id: my_sponsored_post.id 
     expect(response).to have_http_status(:success) 
    end 

    it "renders the #show view" do 
     get :show, topic_id: my_topic.id, id: my_sponsored_post.id 
     expect(response).to render_template :show 
    end 

    it "assigns my_sponsored_post to @sponsored_post" do 
     get :show, topic_id: my_topic.id, id: my_sponsored_post.id 
     expect(assigns(:sponsored_posts)).to eq(my_sponsored_post) 
    end 
    end 


end 

这里是Sponsored_Post我的模型规格：

require 'rails_helper' 
include RandomData 

RSpec.describe SponsoredPost, type: :model do 
    let(:topic) { Topic.create!(name: RandomData.random_sentence, description: RandomData.random_paragraph) } 

    let(:sponsored_post) { topic.sponsored_posts.create!(title: RandomData.random_sentence, body: RandomData.random_paragraph, price: 6) } 

    it { should belong_to(:topic) } 

    describe "attributes" do 

    it "should respond to title" do 
     expect(sponsored_posts).to respond_to(:title) 
    end 

    it "should respond to body" do 
     expect(sponsored_posts).to respond_to(:body) 
    end 

    it "should respond to price" do 
     expect(sponsored_posts).to respond_to(:price) 
    end 

    end 
end 

这里是我的SponsoredPosts控制器：

class SponsoredPostsController < ApplicationController 

    def show 
    @sponsored_post = Sponsored_post.find(params[:id]) 
    end 

    def new 
    end 

    def edit 
    end 

end 

这里是我的SponsoredPost模型：

class SponsoredPost < ActiveRecord::Base 
    belongs_to :topic 
end 

这里是我的架构文件：

ActiveRecord::Schema.define(version: 20151102190350) do 

    create_table "advertisements", force: :cascade do |t| 
    t.string "title" 
    t.text  "copy" 
    t.integer "price" 
    t.datetime "created_at", null: false 
    t.datetime "updated_at", null: false 
    end 

    create_table "comments", force: :cascade do |t| 
    t.text  "body" 
    t.integer "post_id" 
    t.datetime "created_at", null: false 
    t.datetime "updated_at", null: false 
    end 

    add_index "comments", ["post_id"], name: "index_comments_on_post_id" 

    create_table "posts", force: :cascade do |t| 
    t.string "title" 
    t.text  "body" 
    t.datetime "created_at", null: false 
    t.datetime "updated_at", null: false 
    t.integer "topic_id" 
    end 

    add_index "posts", ["topic_id"], name: "index_posts_on_topic_id" 

    create_table "questions", force: :cascade do |t| 
    t.string "title" 
    t.text  "body" 
    t.boolean "resolved" 
    t.datetime "created_at", null: false 
    t.datetime "updated_at", null: false 
    end 

    create_table "sponsored_posts", force: :cascade do |t| 
    t.string "title" 
    t.text  "body" 
    t.integer "price" 
    t.integer "topic_id" 
    t.datetime "created_at", null: false 
    t.datetime "updated_at", null: false 
    end 

    add_index "sponsored_posts", ["topic_id"], name: "index_sponsored_posts_on_topic_id" 

    create_table "topics", force: :cascade do |t| 
    t.string "name" 
    t.boolean "public",  default: true 
    t.text  "description" 
    t.datetime "created_at",     null: false 
    t.datetime "updated_at",     null: false 
    end 

end 

这里是输出当我运行了SponsoredPost控制器的规格：

1) SponsoredPostsController GET show returns http success 
    Failure/Error: let (:my_sponsored_post) { my_topic.sponsored_posts.create!(title: RandomData.random_sentence, body: RandomData.random_paragraph, price: 6) } 
ActiveRecord::UnknownAttributeError: 
    unknown attribute 'topic_id' for SponsoredPost. 

2) SponsoredPostsController GET show renders the #show view 
    Failure/Error: let (:my_sponsored_post) { my_topic.sponsored_posts.create!(title: RandomData.random_sentence, body: RandomData.random_paragraph, price: 6) } 
ActiveRecord::UnknownAttributeError: 
    unknown attribute 'topic_id' for SponsoredPost. 

3) SponsoredPostsController GET show assigns my_sponsored_post to @sponsored_post 
    Failure/Error: let (:my_sponsored_post) { my_topic.sponsored_posts.create!(title: RandomData.random_sentence, body: RandomData.random_paragraph, price: 6) } 
ActiveRecord::UnknownAttributeError: 
    unknown attribute 'topic_id' for SponsoredPost. 

这里是输出当我运行的规范型号：

1) SponsoredPost should belong to topic 
Failure/Error: it { should belong_to(:topic) } 
    Expected SponsoredPost to have a belongs_to association called topic (SponsoredPost does not have a topic_id foreign key.) 
# ./spec/models/sponsored_post_spec.rb:9:in `block (2 levels) in <top (required)>' 

2) SponsoredPost attributes should respond to title 
Failure/Error: expect(sponsored_posts).to respond_to(:title) 
NameError: 
    undefined local variable or method `sponsored_posts' for #<RSpec::ExampleGroups::SponsoredPost::Attributes:0x007f992170a460> 
# ./spec/models/sponsored_post_spec.rb:14:in `block (3 levels) in <top (required)>' 

3) SponsoredPost attributes should respond to body 
Failure/Error: expect(sponsored_posts).to respond_to(:body) 
NameError: 
    undefined local variable or method `sponsored_posts' for #<RSpec::ExampleGroups::SponsoredPost::Attributes:0x007f9921701388> 
# ./spec/models/sponsored_post_spec.rb:19:in `block (3 levels) in <top (required)>' 

4) SponsoredPost attributes should respond to price 
Failure/Error: expect(sponsored_posts).to respond_to(:price) 
NameError: 
    undefined local variable or method `sponsored_posts' for #<RSpec::ExampleGroups::SponsoredPost::Attributes:0x007f99216f9ac0> 
# ./spec/models/sponsored_post_spec.rb:23:in `block (3 levels) in <top (required)>' 

Answer 1

在这里我能为你推荐什么：

• 还有就是你的控制器里面错字应该SponsoredPost而不是Sponsored_post

• 在你的控制器测试，可变sponsored_posts没有定义，也许这将是：

  SponsoredPost.create（标题！ RandomData.random_sentence，body：RandomData.random_paragraph，price：6，topic：my_topic）

• 它在你的模型测试中似乎是同样的问题。