Fix Undo Announce activity is not sent, when not followed by the reblogged post author (#18482)

Co-authored-by: Claire <claire.github-309c@sitedethib.com>

spec/services/reblog_service_spec.rb

@@ -86,9 +86,5 @@ RSpec.describe ReblogService, type: :service do
     it 'distributes to followers' do
       expect(ActivityPub::DistributionWorker).to have_received(:perform_async)
     end
-
-    it 'sends an announce activity to the author' do
-      expect(a_request(:post, bob.inbox_url)).to have_been_made.once
-    end
   end
 end

spec/services/remove_status_service_spec.rb

@@ -110,4 +110,22 @@ RSpec.describe RemoveStatusService, type: :service do
              )).to have_been_made.once
     end
   end
+
+  context 'when removed status is a reblog of a non-follower' do
+    let!(:original_status) { Fabricate(:status, account: bill, text: 'Hello ThisIsASecret', visibility: :public) }
+    let!(:status) { ReblogService.new.call(alice, original_status) }
+
+    it 'sends Undo activity to followers' do
+      subject.call(status)
+      expect(a_request(:post, bill.inbox_url).with(
+               body: hash_including({
+                 'type' => 'Undo',
+                 'object' => hash_including({
+                   'type' => 'Announce',
+                   'object' => ActivityPub::TagManager.instance.uri_for(original_status),
+                 }),
+               })
+             )).to have_been_made.once
+    end
+  end
 end