Fix RSS feeds not being cachable (#14368)

* Add tests for some cachable responses

This only covers responses that we should have managed to make cachable
so far. It's not the case of all responses that should be cachable in
the end.

* Fix RSS feeds not being cachable

1 files changed, 17 insertions, 6 deletions

diff --git a/spec/controllers/activitypub/replies_controller_spec.rb b/spec/controllers/activitypub/replies_controller_spec.rb
index d956e1b35..ed383864d 100644
--- a/spec/controllers/activitypub/replies_controller_spec.rb
+++ b/spec/controllers/activitypub/replies_controller_spec.rb
@@ -7,6 +7,21 @@ RSpec.describe ActivityPub::RepliesController, type: :controller do
   let(:remote_reply_id) { nil }
   let(:remote_account) { nil }
 
+  shared_examples 'cachable response' do
+    it 'does not set cookies' do
+      expect(response.cookies).to be_empty
+      expect(response.headers['Set-Cookies']).to be nil
+    end
+
+    it 'does not set sessions' do
+      expect(session).to be_empty
+    end
+
+    it 'returns public Cache-Control header' do
+      expect(response.headers['Cache-Control']).to include 'public'
+    end
+  end
+
   before do
     allow(controller).to receive(:signed_request_account).and_return(remote_account)
 
@@ -36,9 +51,7 @@ RSpec.describe ActivityPub::RepliesController, type: :controller do
           expect(response.content_type).to eq 'application/activity+json'
         end
 
-        it 'returns public Cache-Control header' do
-          expect(response.headers['Cache-Control']).to include 'public'
-        end
+        it_behaves_like 'cachable response'
 
         it 'returns items with account\'s own replies' do
           json = body_as_json
@@ -87,9 +100,7 @@ RSpec.describe ActivityPub::RepliesController, type: :controller do
             expect(response.content_type).to eq 'application/activity+json'
           end
 
-          it 'returns public Cache-Control header' do
-            expect(response.headers['Cache-Control']).to include 'public'
-          end
+          it_behaves_like 'cachable response'
 
           context 'without only_other_accounts' do
             it 'returns items with account\'s own replies' do