rspec控制器规范匹配器

问题描述

使用哪个匹配器，如何测试 @post_comment 和 @ post_comment.user 是否正确分配？

expect（assigns（：post_comment））。to be_a_new（PostComment） >

更新：

使用以下设置我也得到以下错误。

 帖子:: PostCommentsController当用户登录时POST创建无效的属性不会将新产品保存在db 
中失败/错误：@ post_comment.save！ 
 
 ActiveRecord :: RecordInvalid：
验证失败：正文不能为空
  

如果我删除 @ post_comment.save！，那么我会得到

  Posts :: PostCommentsController当用户登录时POST使用无效属性创建不会在db 
中保存新产品失败/错误：< span class =post-comment-updated> ;％= local_time_ago（post_comment.updated_at）％>< / span> 
 
 ActionView :: Template ::错误：
未定义的方法`to_time'for nil：NilClass 
  

post_comments_controller

  def create 
 @post = Post.find（params [：post_id ]）
 @post_comment = @ post.post_comments.build（post_comment_params）
授权@post_comment 
 @ post_comment.user = current_user 
 @ post_comment.save！ 
 if @ post_comment.save 
 @ post.send_post_comment_creation_notification（@post_comment）
 @post_comment_reply = PostCommentReply.new 
 respond_to do | format | 
 format.html {redirect_to posts_path，notice：评论已保存！ } 
 format.js 
 end 
 end 
 end 
  

post_comments_controller_spec.rb

  describePOST createdo 
 let！（：profile）{create ，user：@user）} 
 let！（：post_instance）{create（：post，user：@user）} 
 
上下文有效属性do 
 subject ：create_action）{xhr：post，：create，post_id：post_instance.id，post_comment：attributes_for（：post_comment，post_id：post_instance.id，user：@user）} 
 
 it保存新任务在dbdo 
 expect {create_action} .to change {PostComment.count} .by（1）
 end 
 
它分配实例变量do 
 create_action 
 expect（assigns（：post））。to eq（post_instance）
 #########如何测试这两个？ 
 #expect（assigns（：post_comment））。to be_a_new（PostComment）
 #expect（assigns（：post_comment.user））to eq（@user）
 expect（assigns post_comment_reply））to be_a_new（PostCommentReply）
 end 
 
它分配所有的实例变量
 
它成功响应do 
 create_action 
 expect（response）.to have_http_status（200）
 end 
 end 
 
上下文具有无效属性do 
 subject（：create_action）{xhr ：post，：create，post_id：post_instance.id，post_comment：attributes_for（：post_comment，post_id：post_instance.id，user：@user，body：）} 
 
 it新产品在dbdo 
 expect {create_action} .to_not change {PostComment.count} 
 end 
 end 
 end 
  
 
 
解决方案
 
 
 
如何测试这两个？
  expect（assigns（：post_comment））to be_a_new（PostComment）
 expect（assigns（：post_comment.user））。 @user）
  
 
 
我相信你不是一个新记录，而是一个类的记录，持久化记录：
  expect（assigns（：post_comment））to be_a（PostComment）
 expect post_comment））to be_presisted 
 expect（assigns（：post_comment.user））。to eq（@user）
  
 
 
 
 
代码过多。
  @ post_comment.save！ 
 if @ post_comment.save 
  
您应该只保留那个记录，相信这是足够的例外：
  @ post_comment.save！ 
  
所以其他部分代码可以选择 if 块。 豁免 save！您将陷入 rescue_from 。
 
 
 
 
With which matcher and how can I test if the @post_comment and @post_comment.user is properly assigned?
expect(assigns(:post_comment)).to be_a_new(PostComment) is not working here.
UPDATE:
With the following setup I also get the following error. What should I change to be able to test the invalid attrs?
Posts::PostCommentsController when user is logged in POST create with invalid attributes doesn't save the new product in the db
 Failure/Error: @post_comment.save!

 ActiveRecord::RecordInvalid:
   Validation failed: Body can't be blank
IF I delete @post_comment.save! then I get
Posts::PostCommentsController when user is logged in POST create with invalid attributes doesn't save the new product in the db
 Failure/Error: <span class="post-comment-updated"><%= local_time_ago(post_comment.updated_at) %></span>

 ActionView::Template::Error:
   undefined method `to_time' for nil:NilClass
post_comments_controller
  def create
    @post = Post.find(params[:post_id])
    @post_comment = @post.post_comments.build(post_comment_params)
    authorize @post_comment
    @post_comment.user = current_user
    @post_comment.save!
    if @post_comment.save
      @post.send_post_comment_creation_notification(@post_comment)
      @post_comment_reply = PostCommentReply.new
      respond_to do |format|
        format.html { redirect_to posts_path, notice: "Comment saved!" }
        format.js
      end
    end
  end
post_comments_controller_spec.rb
describe "POST create" do
  let!(:profile) { create(:profile, user: @user) }
  let!(:post_instance) { create(:post, user: @user) }

  context "with valid attributes" do
    subject(:create_action) { xhr :post, :create, post_id: post_instance.id, post_comment: attributes_for(:post_comment, post_id: post_instance.id, user: @user) }

    it "saves the new task in the db" do
      expect{ create_action }.to change{ PostComment.count }.by(1)
    end

    it "assigns instance variables" do
      create_action
      expect(assigns(:post)).to eq(post_instance)
      #########How to test these two?
      #expect(assigns(:post_comment)).to be_a_new(PostComment)
      #expect(assigns(:post_comment.user)).to eq(@user)
      expect(assigns(:post_comment_reply)).to be_a_new(PostCommentReply)
    end

    it "assigns all the instance variables"

    it "responds with success" do
      create_action
      expect(response).to have_http_status(200)
    end
  end

  context "with invalid attributes" do
    subject(:create_action) { xhr :post, :create, post_id: post_instance.id, post_comment: attributes_for(:post_comment, post_id: post_instance.id, user: @user, body: "") }

    it "doesn't save the new product in the db" do
      expect{ create_action }.to_not change{ PostComment.count }
    end
  end
end
 解决方案 
How to test these two?
expect(assigns(:post_comment)).to be_a_new(PostComment)
expect(assigns(:post_comment.user)).to eq(@user)
I believe you shoudl test not a new record, but a record of a class, and persisted record:
expect(assigns(:post_comment)).to be_a(PostComment)
expect(assigns(:post_comment)).to be_presisted
expect(assigns(:post_comment.user)).to eq(@user)
Excessive code.
@post_comment.save!
if @post_comment.save
You shall to keep only the single record of that, I believe it is enough save with exception:
@post_comment.save!
So other part code you can pick out of if block. Exception from save! you shall to trap with rescue_from.
                        
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