Tests for comments#index (and bugfix)

app/controllers/comments_controller.rb

@@ -6,7 +6,7 @@ class CommentsController < ApplicationController
   responders :flash
 
   def index
-    @comments = Comment.order("comments.created_at": :desc).paginate(page: params[:page])
+    @comments = Comment.order(created_at: :desc).paginate(page: params[:page])
     respond_with(@comments)
   end
 

spec/controllers/comments_controller_spec.rb

@@ -1,10 +1,11 @@
 require 'rails_helper'
 
 describe CommentsController do
+  subject { response }
+  let(:member) { FactoryBot.create(:member) }
   before(:each) do
-    @member = FactoryBot.create(:member)
-    sign_in @member
-    controller.stub(:current_member) { @member }
+    sign_in member
+    controller.stub(:current_member) { member }
   end
 
   def valid_attributes
@@ -13,11 +14,14 @@ describe CommentsController do
   end
 
   describe "GET RSS feed" do
-    it "returns an RSS feed" do
-      get :index, format: "rss"
-      response.should be_success
-      response.should render_template("comments/index")
-      response.content_type.should eq("application/rss+xml")
+    let!(:first_comment) { FactoryBot.create :comment, created_at: 10.days.ago }
+    let!(:last_comment) { FactoryBot.create :comment, created_at: 4.minutes.ago }
+    describe "returns an RSS feed" do
+      before { get :index, format: "rss" }
+      it { is_expected.to be_success }
+      it { is_expected.to render_template("comments/index") }
+      it { expect(response.content_type).to eq("application/rss+xml") }
+      it { expect(assigns(:comments)).to eq([last_comment, first_comment]) }
     end
   end
 
@@ -48,10 +52,10 @@ describe CommentsController do
     before { get :edit, id: comment.to_param }
 
     describe "my comment" do
-      let!(:comment) { FactoryBot.create :comment, author: @member, post: post }
+      let!(:comment) { FactoryBot.create :comment, author: member, post: post }
       let!(:old_comment) { FactoryBot.create(:comment, post: post, created_at: Time.zone.yesterday) }
       it "assigns previous comments as @comments" do
-        assigns(:comments).should eq([comment, old_comment])
+        expect(assigns(:comments)).to eq([comment, old_comment])
       end
     end
 
@@ -65,7 +69,7 @@ describe CommentsController do
     before { put :update, id: comment.to_param, comment: valid_attributes }
 
     describe "my comment" do
-      let(:comment) { FactoryBot.create :comment, author: @member }
+      let(:comment) { FactoryBot.create :comment, author: member }
       it "redirects to the comment's post" do
         expect(response).to redirect_to(comment.post)
       end
@@ -78,7 +82,7 @@ describe CommentsController do
       let(:post) { FactoryBot.create :post, subject: 'our post' }
       let(:other_post) { FactoryBot.create :post, subject: 'the other post' }
       let(:valid_attributes) { { post_id: other_post.id, body: "kōrero" } }
-      let(:comment) { FactoryBot.create :comment, author: @member, post: post }
+      let(:comment) { FactoryBot.create :comment, author: member, post: post }
       it "does not change post_id" do
         comment.reload
         expect(comment.post_id).to eq(post.id)
@@ -90,7 +94,7 @@ describe CommentsController do
     before { delete :destroy, id: comment.to_param }
 
     describe "my comment" do
-      let(:comment) { FactoryBot.create :comment, author: @member }
+      let(:comment) { FactoryBot.create :comment, author: member }
       it "redirects to the post the comment was on" do
         expect(response).to redirect_to(comment.post)
       end