Add more tests for ActivityPub controllers (#13585)

5 files changed, 1265 insertions, 104 deletions

diff --git a/spec/controllers/activitypub/collections_controller_spec.rb b/spec/controllers/activitypub/collections_controller_spec.rb
index 34114cc85..56be49be3 100644
--- a/spec/controllers/activitypub/collections_controller_spec.rb
+++ b/spec/controllers/activitypub/collections_controller_spec.rb
@@ -3,21 +3,133 @@
 require 'rails_helper'
 
 RSpec.describe ActivityPub::CollectionsController, type: :controller do
-  describe 'POST #show' do
-    let(:account) { Fabricate(:account) }
+  let!(:account) { Fabricate(:account) }
+  let(:remote_account) { nil }
 
-    context 'id is "featured"' do
-      it 'returns 200 with "application/activity+json"' do
-        post :show, params: { id: 'featured', account_username: account.username }
+  before do
+    allow(controller).to receive(:signed_request_account).and_return(remote_account)
 
-        expect(response).to have_http_status(200)
-        expect(response.content_type).to eq 'application/activity+json'
+    Fabricate(:status_pin, account: account)
+    Fabricate(:status_pin, account: account)
+    Fabricate(:status, account: account, visibility: :private)
+  end
+
+  describe 'GET #show' do
+    context 'when id is "featured"' do
+      context 'without signature' do
+        let(:remote_account) { nil }
+
+        before do
+          get :show, params: { id: 'featured', account_username: account.username }
+        end
+
+        it 'returns http success' do
+          expect(response).to have_http_status(200)
+        end
+
+        it 'returns application/activity+json' 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 'returns orderedItems with pinned statuses' do
+          json = body_as_json
+          expect(json[:orderedItems]).to be_an Array
+          expect(json[:orderedItems].size).to eq 2
+        end
+      end
+
+      context 'with signature' do
+        let(:remote_account) { Fabricate(:account, domain: 'example.com') }
+
+        context do
+          before do
+            get :show, params: { id: 'featured', account_username: account.username }
+          end
+
+          it 'returns http success' do
+            expect(response).to have_http_status(200)
+          end
+
+          it 'returns application/activity+json' 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 'returns orderedItems with pinned statuses' do
+            json = body_as_json
+            expect(json[:orderedItems]).to be_an Array
+            expect(json[:orderedItems].size).to eq 2
+          end
+        end
+
+        context 'in authorized fetch mode' do
+          before do
+            allow(controller).to receive(:authorized_fetch_mode?).and_return(true)
+          end
+
+          context 'when signed request account is blocked' do
+            before do
+              account.block!(remote_account)
+              get :show, params: { id: 'featured', account_username: account.username }
+            end
+
+            it 'returns http success' do
+              expect(response).to have_http_status(200)
+            end
+
+            it 'returns application/activity+json' do
+              expect(response.content_type).to eq 'application/activity+json'
+            end
+
+            it 'returns private Cache-Control header' do
+              expect(response.headers['Cache-Control']).to include 'private'
+            end
+
+            it 'returns empty orderedItems' do
+              json = body_as_json
+              expect(json[:orderedItems]).to be_an Array
+              expect(json[:orderedItems].size).to eq 0
+            end
+          end
+
+          context 'when signed request account is domain blocked' do
+            before do
+              account.block_domain!(remote_account.domain)
+              get :show, params: { id: 'featured', account_username: account.username }
+            end
+
+            it 'returns http success' do
+              expect(response).to have_http_status(200)
+            end
+
+            it 'returns application/activity+json' do
+              expect(response.content_type).to eq 'application/activity+json'
+            end
+
+            it 'returns private Cache-Control header' do
+              expect(response.headers['Cache-Control']).to include 'private'
+            end
+
+            it 'returns empty orderedItems' do
+              json = body_as_json
+              expect(json[:orderedItems]).to be_an Array
+              expect(json[:orderedItems].size).to eq 0
+            end
+          end
+        end
       end
     end
 
-    context 'id is not "featured"' do
-      it 'returns 404' do
-        post :show, params: { id: 'hoge', account_username: account.username }
+    context 'when id is not "featured"' do
+      it 'returns http not found' do
+        get :show, params: { id: 'hoge', account_username: account.username }
         expect(response).to have_http_status(404)
       end
     end
diff --git a/spec/controllers/activitypub/inboxes_controller_spec.rb b/spec/controllers/activitypub/inboxes_controller_spec.rb
index a9ee75490..f3bc23953 100644
--- a/spec/controllers/activitypub/inboxes_controller_spec.rb
+++ b/spec/controllers/activitypub/inboxes_controller_spec.rb
@@ -3,25 +3,31 @@
 require 'rails_helper'
 
 RSpec.describe ActivityPub::InboxesController, type: :controller do
+  let(:remote_account) { nil }
+
+  before do
+    allow(controller).to receive(:signed_request_account).and_return(remote_account)
+  end
+
   describe 'POST #create' do
-    context 'with signed_request_account' do
-      it 'returns 202' do
-        allow(controller).to receive(:signed_request_account) do
-          Fabricate(:account)
-        end
+    context 'with signature' do
+      let(:remote_account) { Fabricate(:account, domain: 'example.com', protocol: :activitypub) }
 
+      before do
         post :create, body: '{}'
+      end
+
+      it 'returns http accepted' do
         expect(response).to have_http_status(202)
       end
     end
 
-    context 'without signed_request_account' do
-      it 'returns 401' do
-        allow(controller).to receive(:signed_request_account) do
-          false
-        end
-
+    context 'without signature' do
+      before do
         post :create, body: '{}'
+      end
+
+      it 'returns http not authorized' do
         expect(response).to have_http_status(401)
       end
     end
diff --git a/spec/controllers/activitypub/outboxes_controller_spec.rb b/spec/controllers/activitypub/outboxes_controller_spec.rb
index 47460b22c..03490533d 100644
--- a/spec/controllers/activitypub/outboxes_controller_spec.rb
+++ b/spec/controllers/activitypub/outboxes_controller_spec.rb
@@ -4,20 +4,174 @@ RSpec.describe ActivityPub::OutboxesController, type: :controller do
   let!(:account) { Fabricate(:account) }
 
   before do
-    Fabricate(:status, account: account)
+    Fabricate(:status, account: account, visibility: :public)
+    Fabricate(:status, account: account, visibility: :unlisted)
+    Fabricate(:status, account: account, visibility: :private)
+    Fabricate(:status, account: account, visibility: :direct)
+    Fabricate(:status, account: account, visibility: :limited)
+  end
+
+  before do
+    allow(controller).to receive(:signed_request_account).and_return(remote_account)
   end
 
   describe 'GET #show' do
-    before do
-      get :show, params: { account_username: account.username }
-    end
+    context 'without signature' do
+      let(:remote_account) { nil }
+
+      before do
+        get :show, params: { account_username: account.username, page: page }
+      end
+
+      context 'with page not requested' do
+        let(:page) { nil }
+
+        it 'returns http success' do
+          expect(response).to have_http_status(200)
+        end
+
+        it 'returns application/activity+json' do
+          expect(response.content_type).to eq 'application/activity+json'
+        end
+
+        it 'returns totalItems' do
+          json = body_as_json
+          expect(json[:totalItems]).to eq 4
+        end
 
-    it 'returns http success' do
-      expect(response).to have_http_status(200)
+        it 'returns public Cache-Control header' do
+          expect(response.headers['Cache-Control']).to include 'public'
+        end
+      end
+
+      context 'with page requested' do
+        let(:page) { 'true' }
+
+        it 'returns http success' do
+          expect(response).to have_http_status(200)
+        end
+
+        it 'returns application/activity+json' do
+          expect(response.content_type).to eq 'application/activity+json'
+        end
+
+        it 'returns orderedItems with public or unlisted statuses' do
+          json = body_as_json
+          expect(json[:orderedItems]).to be_an Array
+          expect(json[:orderedItems].size).to eq 2
+          expect(json[:orderedItems].all? { |item| item[:to].include?(ActivityPub::TagManager::COLLECTIONS[:public]) || item[:cc].include?(ActivityPub::TagManager::COLLECTIONS[:public]) }).to be true
+        end
+
+        it 'returns public Cache-Control header' do
+          expect(response.headers['Cache-Control']).to include 'public'
+        end
+      end
     end
 
-    it 'returns application/activity+json' do
-      expect(response.content_type).to eq 'application/activity+json'
+    context 'with signature' do
+      let(:remote_account) { Fabricate(:account, domain: 'example.com') }
+      let(:page) { 'true' }
+
+      context 'when signed request account does not follow account' do
+        before do
+          get :show, params: { account_username: account.username, page: page }
+        end
+
+        it 'returns http success' do
+          expect(response).to have_http_status(200)
+        end
+
+        it 'returns application/activity+json' do
+          expect(response.content_type).to eq 'application/activity+json'
+        end
+
+        it 'returns orderedItems with public or unlisted statuses' do
+          json = body_as_json
+          expect(json[:orderedItems]).to be_an Array
+          expect(json[:orderedItems].size).to eq 2
+          expect(json[:orderedItems].all? { |item| item[:to].include?(ActivityPub::TagManager::COLLECTIONS[:public]) || item[:cc].include?(ActivityPub::TagManager::COLLECTIONS[:public]) }).to be true
+        end
+
+        it 'returns private Cache-Control header' do
+          expect(response.headers['Cache-Control']).to eq 'max-age=0, private'
+        end
+      end
+
+      context 'when signed request account follows account' do
+        before do
+          remote_account.follow!(account)
+          get :show, params: { account_username: account.username, page: page }
+        end
+
+        it 'returns http success' do
+          expect(response).to have_http_status(200)
+        end
+
+        it 'returns application/activity+json' do
+          expect(response.content_type).to eq 'application/activity+json'
+        end
+
+        it 'returns orderedItems with private statuses' do
+          json = body_as_json
+          expect(json[:orderedItems]).to be_an Array
+          expect(json[:orderedItems].size).to eq 3
+          expect(json[:orderedItems].all? { |item| item[:to].include?(ActivityPub::TagManager::COLLECTIONS[:public]) || item[:cc].include?(ActivityPub::TagManager::COLLECTIONS[:public]) || item[:to].include?(account_followers_url(account, ActionMailer::Base.default_url_options)) }).to be true
+        end
+
+        it 'returns private Cache-Control header' do
+          expect(response.headers['Cache-Control']).to eq 'max-age=0, private'
+        end
+      end
+
+      context 'when signed request account is blocked' do
+        before do
+          account.block!(remote_account)
+          get :show, params: { account_username: account.username, page: page }
+        end
+
+        it 'returns http success' do
+          expect(response).to have_http_status(200)
+        end
+
+        it 'returns application/activity+json' do
+          expect(response.content_type).to eq 'application/activity+json'
+        end
+
+        it 'returns empty orderedItems' do
+          json = body_as_json
+          expect(json[:orderedItems]).to be_an Array
+          expect(json[:orderedItems].size).to eq 0
+        end
+
+        it 'returns private Cache-Control header' do
+          expect(response.headers['Cache-Control']).to eq 'max-age=0, private'
+        end
+      end
+
+      context 'when signed request account is domain blocked' do
+        before do
+          account.block_domain!(remote_account.domain)
+          get :show, params: { account_username: account.username, page: page }
+        end
+
+        it 'returns http success' do
+          expect(response).to have_http_status(200)
+        end
+
+        it 'returns application/activity+json' do
+          expect(response.content_type).to eq 'application/activity+json'
+        end
+
+        it 'returns empty orderedItems' do
+          json = body_as_json
+          expect(json[:orderedItems]).to be_an Array
+          expect(json[:orderedItems].size).to eq 0
+        end
+
+        it 'returns private Cache-Control header' do
+          expect(response.headers['Cache-Control']).to eq 'max-age=0, private'
+        end
+      end
     end
   end
 end
diff --git a/spec/controllers/activitypub/replies_controller_spec.rb b/spec/controllers/activitypub/replies_controller_spec.rb
new file mode 100644
index 000000000..a5ed14180
--- /dev/null
+++ b/spec/controllers/activitypub/replies_controller_spec.rb
@@ -0,0 +1,196 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe ActivityPub::RepliesController, type: :controller do
+  let(:status) { Fabricate(:status, visibility: parent_visibility) }
+  let(:remote_account) { nil }
+
+  before do
+    allow(controller).to receive(:signed_request_account).and_return(remote_account)
+
+    Fabricate(:status, thread: status, visibility: :public)
+    Fabricate(:status, thread: status, visibility: :public)
+    Fabricate(:status, thread: status, visibility: :private)
+    Fabricate(:status, account: status.account, thread: status, visibility: :public)
+    Fabricate(:status, account: status.account, thread: status, visibility: :private)
+  end
+
+  describe 'GET #index' do
+    context 'with no signature' do
+      before do
+        get :index, params: { account_username: status.account.username, status_id: status.id }
+      end
+
+      context 'when status is public' do
+        let(:parent_visibility) { :public }
+
+        it 'returns http success' do
+          expect(response).to have_http_status(200)
+        end
+
+        it 'returns application/activity+json' 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 'returns items with account\'s own replies' do
+          json = body_as_json
+
+          expect(json[:first]).to be_a Hash
+          expect(json[:first][:items]).to be_an Array
+          expect(json[:first][:items].size).to eq 1
+          expect(json[:first][:items].all? { |item| item[:to].include?(ActivityPub::TagManager::COLLECTIONS[:public]) || item[:cc].include?(ActivityPub::TagManager::COLLECTIONS[:public]) }).to be true
+        end
+      end
+
+      context 'when status is private' do
+        let(:parent_visibility) { :private }
+
+        it 'returns http not found' do
+          expect(response).to have_http_status(404)
+        end
+      end
+
+      context 'when status is direct' do
+        let(:parent_visibility) { :direct }
+
+        it 'returns http not found' do
+          expect(response).to have_http_status(404)
+        end
+      end
+    end
+
+    context 'with signature' do
+      let(:remote_account) { Fabricate(:account, domain: 'example.com') }
+      let(:only_other_accounts) { nil }
+
+      context do
+        before do
+          get :index, params: { account_username: status.account.username, status_id: status.id, only_other_accounts: only_other_accounts }
+        end
+
+        context 'when status is public' do
+          let(:parent_visibility) { :public }
+
+          it 'returns http success' do
+            expect(response).to have_http_status(200)
+          end
+
+          it 'returns application/activity+json' 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
+
+          context 'without only_other_accounts' do
+            it 'returns items with account\'s own replies' do
+              json = body_as_json
+
+              expect(json[:first]).to be_a Hash
+              expect(json[:first][:items]).to be_an Array
+              expect(json[:first][:items].size).to eq 1
+              expect(json[:first][:items].all? { |item| item[:to].include?(ActivityPub::TagManager::COLLECTIONS[:public]) || item[:cc].include?(ActivityPub::TagManager::COLLECTIONS[:public]) }).to be true
+            end
+          end
+
+          context 'with only_other_accounts' do
+            let(:only_other_accounts) { 'true' }
+
+            it 'returns items with other public or unlisted replies' do
+              json = body_as_json
+
+              expect(json[:first]).to be_a Hash
+              expect(json[:first][:items]).to be_an Array
+              expect(json[:first][:items].size).to eq 2
+              expect(json[:first][:items].all? { |item| item[:to].include?(ActivityPub::TagManager::COLLECTIONS[:public]) || item[:cc].include?(ActivityPub::TagManager::COLLECTIONS[:public]) }).to be true
+            end
+          end
+        end
+
+        context 'when status is private' do
+          let(:parent_visibility) { :private }
+
+          it 'returns http not found' do
+            expect(response).to have_http_status(404)
+          end
+        end
+
+        context 'when status is direct' do
+          let(:parent_visibility) { :direct }
+
+          it 'returns http not found' do
+            expect(response).to have_http_status(404)
+          end
+        end
+      end
+
+      context 'when signed request account is blocked' do
+        before do
+          status.account.block!(remote_account)
+          get :index, params: { account_username: status.account.username, status_id: status.id }
+        end
+
+        context 'when status is public' do
+          let(:parent_visibility) { :public }
+
+          it 'returns http not found' do
+            expect(response).to have_http_status(404)
+          end
+        end
+
+        context 'when status is private' do
+          let(:parent_visibility) { :private }
+
+          it 'returns http not found' do
+            expect(response).to have_http_status(404)
+          end
+        end
+
+        context 'when status is direct' do
+          let(:parent_visibility) { :direct }
+
+          it 'returns http not found' do
+            expect(response).to have_http_status(404)
+          end
+        end
+      end
+
+      context 'when signed request account is domain blocked' do
+        before do
+          status.account.block_domain!(remote_account.domain)
+          get :index, params: { account_username: status.account.username, status_id: status.id }
+        end
+
+        context 'when status is public' do
+          let(:parent_visibility) { :public }
+
+          it 'returns http not found' do
+            expect(response).to have_http_status(404)
+          end
+        end
+
+        context 'when status is private' do
+          let(:parent_visibility) { :private }
+
+          it 'returns http not found' do
+            expect(response).to have_http_status(404)
+          end
+        end
+
+        context 'when status is direct' do
+          let(:parent_visibility) { :direct }
+
+          it 'returns http not found' do
+            expect(response).to have_http_status(404)
+          end
+        end
+      end
+    end
+  end
+end
diff --git a/spec/controllers/statuses_controller_spec.rb b/spec/controllers/statuses_controller_spec.rb
index 6905dae10..ba1f1370a 100644
--- a/spec/controllers/statuses_controller_spec.rb
+++ b/spec/controllers/statuses_controller_spec.rb
@@ -5,128 +5,821 @@ require 'rails_helper'
 describe StatusesController do
   render_views
 
-  describe '#show' do
-    context 'account is suspended' do
-      it 'returns gone' do
-        account = Fabricate(:account, suspended: true)
-        status = Fabricate(:status, account: account)
+  describe 'GET #show' do
+    let(:account) { Fabricate(:account) }
+    let(:status)  { Fabricate(:status, account: account) }
 
+    context 'when account is suspended' do
+      let(:account) { Fabricate(:account, suspended: true) }
+
+      before do
         get :show, params: { account_username: account.username, id: status.id }
+      end
 
+      it 'returns http gone' do
         expect(response).to have_http_status(410)
       end
     end
 
-    context 'status is not permitted' do
-      it 'raises ActiveRecord::RecordNotFound' do
-        user = Fabricate(:user)
-        status = Fabricate(:status)
-        status.account.block!(user.account)
+    context 'when status is a reblog' do
+      let(:original_account) { Fabricate(:account, domain: 'example.com') }
+      let(:original_status) { Fabricate(:status, account: original_account, url: 'https://example.com/123') }
+      let(:status) { Fabricate(:status, account: account, reblog: original_status) }
 
-        sign_in(user)
+      before do
         get :show, params: { account_username: status.account.username, id: status.id }
+      end
 
-        expect(response).to have_http_status(404)
+      it 'redirects to the original status' do
+        expect(response).to redirect_to(original_status.url)
       end
     end
 
-    context 'status is a reblog' do
-      it 'redirects to the original status' do
-        original_account = Fabricate(:account, domain: 'example.com')
-        original_status = Fabricate(:status, account: original_account, uri: 'tag:example.com,2017:foo', url: 'https://example.com/123')
-        status = Fabricate(:status, reblog: original_status)
+    context 'when status is public' do
+      before do
+        get :show, params: { account_username: status.account.username, id: status.id, format: format }
+      end
 
-        get :show, params: { account_username: status.account.username, id: status.id }
+      context 'as HTML' do
+        let(:format) { 'html' }
 
-        expect(response).to redirect_to(original_status.url)
+        it 'returns http success' do
+          expect(response).to have_http_status(200)
+        end
+
+        it 'returns Link header' do
+          expect(response.headers['Link'].to_s).to include 'activity+json'
+        end
+
+        it 'returns Vary header' do
+          expect(response.headers['Vary']).to eq 'Accept'
+        end
+
+        it 'returns public Cache-Control header' do
+          expect(response.headers['Cache-Control']).to include 'public'
+        end
+
+        it 'renders status' do
+          expect(response).to render_template(:show)
+          expect(response.body).to include status.text
+        end
+      end
+
+      context 'as JSON' do
+        let(:format) { 'json' }
+
+        it 'returns http success' do
+          expect(response).to have_http_status(200)
+        end
+
+        it 'returns Link header' do
+          expect(response.headers['Link'].to_s).to include 'activity+json'
+        end
+
+        it 'returns Vary header' do
+          expect(response.headers['Vary']).to eq 'Accept'
+        end
+
+        it 'returns public Cache-Control header' do
+          expect(response.headers['Cache-Control']).to include 'public'
+        end
+
+        it 'returns Content-Type header' do
+          expect(response.headers['Content-Type']).to include 'application/activity+json'
+        end
+
+        it 'renders ActivityPub Note object' do
+          json = body_as_json
+          expect(json[:content]).to include status.text
+        end
       end
     end
 
-    context 'account is not suspended and status is permitted' do
-      it 'assigns @account' do
-        status = Fabricate(:status)
-        get :show, params: { account_username: status.account.username, id: status.id }
-        expect(assigns(:account)).to eq status.account
+    context 'when status is private' do
+      let(:status) { Fabricate(:status, account: account, visibility: :private) }
+
+      before do
+        get :show, params: { account_username: status.account.username, id: status.id, format: format }
       end
 
-      it 'assigns @status' do
-        status = Fabricate(:status)
-        get :show, params: { account_username: status.account.username, id: status.id }
-        expect(assigns(:status)).to eq status
+      context 'as JSON' do
+        let(:format) { 'json' }
+
+        it 'returns http not found' do
+          expect(response).to have_http_status(404)
+        end
       end
 
-      it 'assigns @ancestors for ancestors of the status if it is a reply' do
-        ancestor = Fabricate(:status)
-        status = Fabricate(:status, in_reply_to_id: ancestor.id)
+      context 'as HTML' do
+        let(:format) { 'html' }
 
-        get :show, params: { account_username: status.account.username, id: status.id }
+        it 'returns http not found' do
+          expect(response).to have_http_status(404)
+        end
+      end
+    end
+
+    context 'when status is direct' do
+      let(:status) { Fabricate(:status, account: account, visibility: :direct) }
 
-        expect(assigns(:ancestors)).to eq [ancestor]
+      before do
+        get :show, params: { account_username: status.account.username, id: status.id, format: format }
       end
 
-      it 'assigns @ancestors for [] if it is not a reply' do
-        status = Fabricate(:status)
-        get :show, params: { account_username: status.account.username, id: status.id }
-        expect(assigns(:ancestors)).to eq []
+      context 'as JSON' do
+        let(:format) { 'json' }
+
+        it 'returns http not found' do
+          expect(response).to have_http_status(404)
+        end
       end
 
-      it 'assigns @descendant_threads for a thread with several statuses' do
-        status = Fabricate(:status)
-        child = Fabricate(:status, in_reply_to_id: status.id)
-        grandchild = Fabricate(:status, in_reply_to_id: child.id)
+      context 'as HTML' do
+        let(:format) { 'html' }
 
-        get :show, params: { account_username: status.account.username, id: status.id }
+        it 'returns http not found' do
+          expect(response).to have_http_status(404)
+        end
+      end
+    end
+
+    context 'when signed-in' do
+      let(:user) { Fabricate(:user) }
 
-        expect(assigns(:descendant_threads)[0][:statuses].pluck(:id)).to eq [child.id, grandchild.id]
+      before do
+        sign_in(user)
       end
 
-      it 'assigns @descendant_threads for several threads sharing the same descendant' do
-        status = Fabricate(:status)
-        child = Fabricate(:status, in_reply_to_id: status.id)
-        grandchildren = 2.times.map { Fabricate(:status, in_reply_to_id: child.id) }
+      context 'when account blocks user' do
+        before do
+          account.block!(user.account)
+          get :show, params: { account_username: status.account.username, id: status.id }
+        end
 
-        get :show, params: { account_username: status.account.username, id: status.id }
+        it 'returns http not found' do
+          expect(response).to have_http_status(404)
+        end
+      end
+
+      context 'when status is public' do
+        before do
+          get :show, params: { account_username: status.account.username, id: status.id, format: format }
+        end
+
+        context 'as HTML' do
+          let(:format) { 'html' }
+
+          it 'returns http success' do
+            expect(response).to have_http_status(200)
+          end
+
+          it 'returns Link header' do
+            expect(response.headers['Link'].to_s).to include 'activity+json'
+          end
 
-        expect(assigns(:descendant_threads)[0][:statuses].pluck(:id)).to eq [child.id, grandchildren[0].id]
-        expect(assigns(:descendant_threads)[1][:statuses].pluck(:id)).to eq [grandchildren[1].id]
+          it 'returns Vary header' do
+            expect(response.headers['Vary']).to eq 'Accept'
+          end
+
+          it 'returns no Cache-Control header' do
+            expect(response.headers).to_not include 'Cache-Control'
+          end
+
+          it 'renders status' do
+            expect(response).to render_template(:show)
+            expect(response.body).to include status.text
+          end
+        end
+
+        context 'as JSON' do
+          let(:format) { 'json' }
+
+          it 'returns http success' do
+            expect(response).to have_http_status(200)
+          end
+
+          it 'returns Link header' do
+            expect(response.headers['Link'].to_s).to include 'activity+json'
+          end
+
+          it 'returns Vary header' do
+            expect(response.headers['Vary']).to eq 'Accept'
+          end
+
+          it 'returns public Cache-Control header' do
+            expect(response.headers['Cache-Control']).to include 'public'
+          end
+
+          it 'returns Content-Type header' do
+            expect(response.headers['Content-Type']).to include 'application/activity+json'
+          end
+
+          it 'renders ActivityPub Note object' do
+            json = body_as_json
+            expect(json[:content]).to include status.text
+          end
+        end
       end
 
-      it 'assigns @max_descendant_thread_id for the last thread if it is hitting the status limit' do
-        stub_const 'StatusControllerConcern::DESCENDANTS_LIMIT', 1
-        status = Fabricate(:status)
-        child = Fabricate(:status, in_reply_to_id: status.id)
+      context 'when status is private' do
+        let(:status) { Fabricate(:status, account: account, visibility: :private) }
 
-        get :show, params: { account_username: status.account.username, id: status.id }
+        context 'when user is authorized to see it' do
+          before do
+            user.account.follow!(account)
+            get :show, params: { account_username: status.account.username, id: status.id, format: format }
+          end
+
+          context 'as HTML' do
+            let(:format) { 'html' }
+
+            it 'returns http success' do
+              expect(response).to have_http_status(200)
+            end
+
+            it 'returns Link header' do
+              expect(response.headers['Link'].to_s).to include 'activity+json'
+            end
+
+            it 'returns Vary header' do
+              expect(response.headers['Vary']).to eq 'Accept'
+            end
 
-        expect(assigns(:descendant_threads)).to eq []
-        expect(assigns(:max_descendant_thread_id)).to eq child.id
+            it 'returns no Cache-Control header' do
+              expect(response.headers).to_not include 'Cache-Control'
+            end
+
+            it 'renders status' do
+              expect(response).to render_template(:show)
+              expect(response.body).to include status.text
+            end
+          end
+
+          context 'as JSON' do
+            let(:format) { 'json' }
+
+            it 'returns http success' do
+              expect(response).to have_http_status(200)
+            end
+
+            it 'returns Link header' do
+              expect(response.headers['Link'].to_s).to include 'activity+json'
+            end
+
+            it 'returns Vary header' do
+              expect(response.headers['Vary']).to eq 'Accept'
+            end
+
+            it 'returns private Cache-Control header' do
+              expect(response.headers['Cache-Control']).to include 'private'
+            end
+
+            it 'returns Content-Type header' do
+              expect(response.headers['Content-Type']).to include 'application/activity+json'
+            end
+
+            it 'renders ActivityPub Note object' do
+              json = body_as_json
+              expect(json[:content]).to include status.text
+            end
+          end
+        end
+
+        context 'when user is not authorized to see it' do
+          before do
+            get :show, params: { account_username: status.account.username, id: status.id, format: format }
+          end
+
+          context 'as JSON' do
+            let(:format) { 'json' }
+
+            it 'returns http not found' do
+              expect(response).to have_http_status(404)
+            end
+          end
+
+          context 'as HTML' do
+            let(:format) { 'html' }
+
+            it 'returns http not found' do
+              expect(response).to have_http_status(404)
+            end
+          end
+        end
       end
 
-      it 'assigns @descendant_threads for threads with :next_status key if they are hitting the depth limit' do
-        stub_const 'StatusControllerConcern::DESCENDANTS_DEPTH_LIMIT', 2
-        status = Fabricate(:status)
-        child0 = Fabricate(:status, in_reply_to_id: status.id)
-        child1 = Fabricate(:status, in_reply_to_id: child0.id)
-        child2 = Fabricate(:status, in_reply_to_id: child0.id)
+      context 'when status is direct' do
+        let(:status) { Fabricate(:status, account: account, visibility: :direct) }
 
-        get :show, params: { account_username: status.account.username, id: status.id }
+        context 'when user is authorized to see it' do
+          before do
+            Fabricate(:mention, account: user.account, status: status)
+            get :show, params: { account_username: status.account.username, id: status.id, format: format }
+          end
+
+          context 'as HTML' do
+            let(:format) { 'html' }
+
+            it 'returns http success' do
+              expect(response).to have_http_status(200)
+            end
+
+            it 'returns Link header' do
+              expect(response.headers['Link'].to_s).to include 'activity+json'
+            end
+
+            it 'returns Vary header' do
+              expect(response.headers['Vary']).to eq 'Accept'
+            end
+
+            it 'returns no Cache-Control header' do
+              expect(response.headers).to_not include 'Cache-Control'
+            end
+
+            it 'renders status' do
+              expect(response).to render_template(:show)
+              expect(response.body).to include status.text
+            end
+          end
+
+          context 'as JSON' do
+            let(:format) { 'json' }
+
+            it 'returns http success' do
+              expect(response).to have_http_status(200)
+            end
+
+            it 'returns Link header' do
+              expect(response.headers['Link'].to_s).to include 'activity+json'
+            end
+
+            it 'returns Vary header' do
+              expect(response.headers['Vary']).to eq 'Accept'
+            end
+
+            it 'returns private Cache-Control header' do
+              expect(response.headers['Cache-Control']).to include 'private'
+            end
+
+            it 'returns Content-Type header' do
+              expect(response.headers['Content-Type']).to include 'application/activity+json'
+            end
+
+            it 'renders ActivityPub Note object' do
+              json = body_as_json
+              expect(json[:content]).to include status.text
+            end
+          end
+        end
+
+        context 'when user is not authorized to see it' do
+          before do
+            get :show, params: { account_username: status.account.username, id: status.id, format: format }
+          end
+
+          context 'as JSON' do
+            let(:format) { 'json' }
 
-        expect(assigns(:descendant_threads)[0][:statuses].pluck(:id)).not_to include child1.id
-        expect(assigns(:descendant_threads)[1][:statuses].pluck(:id)).not_to include child2.id
-        expect(assigns(:descendant_threads)[0][:next_status].id).to eq child1.id
-        expect(assigns(:descendant_threads)[1][:next_status].id).to eq child2.id
+            it 'returns http not found' do
+              expect(response).to have_http_status(404)
+            end
+          end
+
+          context 'as HTML' do
+            let(:format) { 'html' }
+
+            it 'returns http not found' do
+              expect(response).to have_http_status(404)
+            end
+          end
+        end
       end
+    end
 
-      it 'returns a success' do
-        status = Fabricate(:status)
-        get :show, params: { account_username: status.account.username, id: status.id }
+    context 'with signature' do
+      let(:remote_account) { Fabricate(:account, domain: 'example.com') }
+
+      before do
+        allow(controller).to receive(:signed_request_account).and_return(remote_account)
+      end
+
+      context 'when account blocks account' do
+        before do
+          account.block!(remote_account)
+          get :show, params: { account_username: status.account.username, id: status.id }
+        end
+
+        it 'returns http not found' do
+          expect(response).to have_http_status(404)
+        end
+      end
+
+      context 'when account domain blocks account' do
+        before do
+          account.block_domain!(remote_account.domain)
+          get :show, params: { account_username: status.account.username, id: status.id }
+        end
+
+        it 'returns http not found' do
+          expect(response).to have_http_status(404)
+        end
+      end
+
+      context 'when status is public' do
+        before do
+          get :show, params: { account_username: status.account.username, id: status.id, format: format }
+        end
+
+        context 'as HTML' do
+          let(:format) { 'html' }
+
+          it 'returns http success' do
+            expect(response).to have_http_status(200)
+          end
+
+          it 'returns Link header' do
+            expect(response.headers['Link'].to_s).to include 'activity+json'
+          end
+
+          it 'returns Vary header' do
+            expect(response.headers['Vary']).to eq 'Accept'
+          end
+
+          it 'returns no Cache-Control header' do
+            expect(response.headers).to_not include 'Cache-Control'
+          end
+
+          it 'renders status' do
+            expect(response).to render_template(:show)
+            expect(response.body).to include status.text
+          end
+        end
+
+        context 'as JSON' do
+          let(:format) { 'json' }
+
+          it 'returns http success' do
+            expect(response).to have_http_status(200)
+          end
+
+          it 'returns Link header' do
+            expect(response.headers['Link'].to_s).to include 'activity+json'
+          end
+
+          it 'returns Vary header' do
+            expect(response.headers['Vary']).to eq 'Accept'
+          end
+
+          it 'returns public Cache-Control header' do
+            expect(response.headers['Cache-Control']).to include 'public'
+          end
+
+          it 'returns Content-Type header' do
+            expect(response.headers['Content-Type']).to include 'application/activity+json'
+          end
+
+          it 'renders ActivityPub Note object' do
+            json = body_as_json
+            expect(json[:content]).to include status.text
+          end
+        end
+      end
+
+      context 'when status is private' do
+        let(:status) { Fabricate(:status, account: account, visibility: :private) }
+
+        context 'when user is authorized to see it' do
+          before do
+            remote_account.follow!(account)
+            get :show, params: { account_username: status.account.username, id: status.id, format: format }
+          end
+
+          context 'as HTML' do
+            let(:format) { 'html' }
+
+            it 'returns http success' do
+              expect(response).to have_http_status(200)
+            end
+
+            it 'returns Link header' do
+              expect(response.headers['Link'].to_s).to include 'activity+json'
+            end
+
+            it 'returns Vary header' do
+              expect(response.headers['Vary']).to eq 'Accept'
+            end
+
+            it 'returns no Cache-Control header' do
+              expect(response.headers).to_not include 'Cache-Control'
+            end
+
+            it 'renders status' do
+              expect(response).to render_template(:show)
+              expect(response.body).to include status.text
+            end
+          end
+
+          context 'as JSON' do
+            let(:format) { 'json' }
+
+            it 'returns http success' do
+              expect(response).to have_http_status(200)
+            end
+
+            it 'returns Link header' do
+              expect(response.headers['Link'].to_s).to include 'activity+json'
+            end
+
+            it 'returns Vary header' do
+              expect(response.headers['Vary']).to eq 'Accept'
+            end
+
+            it 'returns private Cache-Control header' do
+              expect(response.headers['Cache-Control']).to include 'private'
+            end
+
+            it 'returns Content-Type header' do
+              expect(response.headers['Content-Type']).to include 'application/activity+json'
+            end
+
+            it 'renders ActivityPub Note object' do
+              json = body_as_json
+              expect(json[:content]).to include status.text
+            end
+          end
+        end
+
+        context 'when user is not authorized to see it' do
+          before do
+            get :show, params: { account_username: status.account.username, id: status.id, format: format }
+          end
+
+          context 'as JSON' do
+            let(:format) { 'json' }
+
+            it 'returns http not found' do
+              expect(response).to have_http_status(404)
+            end
+          end
+
+          context 'as HTML' do
+            let(:format) { 'html' }
+
+            it 'returns http not found' do
+              expect(response).to have_http_status(404)
+            end
+          end
+        end
+      end
+
+      context 'when status is direct' do
+        let(:status) { Fabricate(:status, account: account, visibility: :direct) }
+
+        context 'when user is authorized to see it' do
+          before do
+            Fabricate(:mention, account: remote_account, status: status)
+            get :show, params: { account_username: status.account.username, id: status.id, format: format }
+          end
+
+          context 'as HTML' do
+            let(:format) { 'html' }
+
+            it 'returns http success' do
+              expect(response).to have_http_status(200)
+            end
+
+            it 'returns Link header' do
+              expect(response.headers['Link'].to_s).to include 'activity+json'
+            end
+
+            it 'returns Vary header' do
+              expect(response.headers['Vary']).to eq 'Accept'
+            end
+
+            it 'returns no Cache-Control header' do
+              expect(response.headers).to_not include 'Cache-Control'
+            end
+
+            it 'renders status' do
+              expect(response).to render_template(:show)
+              expect(response.body).to include status.text
+            end
+          end
+
+          context 'as JSON' do
+            let(:format) { 'json' }
+
+            it 'returns http success' do
+              expect(response).to have_http_status(200)
+            end
+
+            it 'returns Link header' do
+              expect(response.headers['Link'].to_s).to include 'activity+json'
+            end
+
+            it 'returns Vary header' do
+              expect(response.headers['Vary']).to eq 'Accept'
+            end
+
+            it 'returns private Cache-Control header' do
+              expect(response.headers['Cache-Control']).to include 'private'
+            end
+
+            it 'returns Content-Type header' do
+              expect(response.headers['Content-Type']).to include 'application/activity+json'
+            end
+
+            it 'renders ActivityPub Note object' do
+              json = body_as_json
+              expect(json[:content]).to include status.text
+            end
+          end
+        end
+
+        context 'when user is not authorized to see it' do
+          before do
+            get :show, params: { account_username: status.account.username, id: status.id, format: format }
+          end
+
+          context 'as JSON' do
+            let(:format) { 'json' }
+
+            it 'returns http not found' do
+              expect(response).to have_http_status(404)
+            end
+          end
+
+          context 'as HTML' do
+            let(:format) { 'html' }
+
+            it 'returns http not found' do
+              expect(response).to have_http_status(404)
+            end
+          end
+        end
+      end
+    end
+  end
+
+  describe 'GET #activity' do
+    let(:account) { Fabricate(:account) }
+    let(:status)  { Fabricate(:status, account: account) }
+
+    context 'when account is suspended' do
+      let(:account) { Fabricate(:account, suspended: true) }
+
+      before do
+        get :activity, params: { account_username: account.username, id: status.id }
+      end
+
+      it 'returns http gone' do
+        expect(response).to have_http_status(410)
+      end
+    end
+
+    context 'when status is public' do
+      pending
+    end
+
+    context 'when status is private' do
+      pending
+    end
+
+    context 'when status is direct' do
+      pending
+    end
+
+    context 'when signed-in' do
+      context 'when status is public' do
+        pending
+      end
+
+      context 'when status is private' do
+        context 'when user is authorized to see it' do
+          pending
+        end
+
+        context 'when user is not authorized to see it' do
+          pending
+        end
+      end
+
+      context 'when status is direct' do
+        context 'when user is authorized to see it' do
+          pending
+        end
+
+        context 'when user is not authorized to see it' do
+          pending
+        end
+      end
+    end
+
+    context 'with signature' do
+      context 'when status is public' do
+        pending
+      end
+
+      context 'when status is private' do
+        context 'when user is authorized to see it' do
+          pending
+        end
+
+        context 'when user is not authorized to see it' do
+          pending
+        end
+      end
+
+      context 'when status is direct' do
+        context 'when user is authorized to see it' do
+          pending
+        end
+
+        context 'when user is not authorized to see it' do
+          pending
+        end
+      end
+    end
+  end
+
+  describe 'GET #embed' do
+    let(:account) { Fabricate(:account) }
+    let(:status)  { Fabricate(:status, account: account) }
+
+    context 'when account is suspended' do
+      let(:account) { Fabricate(:account, suspended: true) }
+
+      before do
+        get :embed, params: { account_username: account.username, id: status.id }
+      end
+
+      it 'returns http gone' do
+        expect(response).to have_http_status(410)
+      end
+    end
+
+    context 'when status is a reblog' do
+      let(:original_account) { Fabricate(:account, domain: 'example.com') }
+      let(:original_status) { Fabricate(:status, account: original_account, url: 'https://example.com/123') }
+      let(:status) { Fabricate(:status, account: account, reblog: original_status) }
+
+      before do
+        get :embed, params: { account_username: status.account.username, id: status.id }
+      end
+
+      it 'returns http not found' do
+        expect(response).to have_http_status(404)
+      end
+    end
+
+    context 'when status is public' do
+      before do
+        get :embed, params: { account_username: status.account.username, id: status.id }
+      end
+
+      it 'returns http success' do
         expect(response).to have_http_status(200)
       end
 
-      it 'renders statuses/show' do
-        status = Fabricate(:status)
-        get :show, params: { account_username: status.account.username, id: status.id }
-        expect(response).to render_template 'statuses/show'
+      it 'returns Link header' do
+        expect(response.headers['Link'].to_s).to include 'activity+json'
+      end
+
+      it 'returns Vary header' do
+        expect(response.headers['Vary']).to eq 'Accept'
+      end
+
+      it 'returns public Cache-Control header' do
+        expect(response.headers['Cache-Control']).to include 'public'
+      end
+
+      it 'renders status' do
+        expect(response).to render_template(:embed)
+        expect(response.body).to include status.text
+      end
+    end
+
+    context 'when status is private' do
+      let(:status) { Fabricate(:status, account: account, visibility: :private) }
+
+      before do
+        get :embed, params: { account_username: status.account.username, id: status.id }
+      end
+
+      it 'returns http not found' do
+        expect(response).to have_http_status(404)
+      end
+    end
+
+    context 'when status is direct' do
+      let(:status) { Fabricate(:status, account: account, visibility: :direct) }
+
+      before do
+        get :embed, params: { account_username: status.account.username, id: status.id }
+      end
+
+      it 'returns http not found' do
+        expect(response).to have_http_status(404)
       end
     end
   end