Migrate to request specs in /api/v1/timelines/public (#25746)

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

spec/requests/api/v1/timelines/public_spec.rb

@@ -0,0 +1,109 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+describe 'Public' do
+  let(:user)    { Fabricate(:user) }
+  let(:scopes)  { 'read:statuses' }
+  let(:token)   { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: scopes) }
+  let(:headers) { { 'Authorization' => "Bearer #{token.token}" } }
+
+  shared_examples 'a successful request to the public timeline' do
+    it 'returns the expected statuses successfully', :aggregate_failures do
+      subject
+
+      expect(response).to have_http_status(200)
+      expect(body_as_json.pluck(:id)).to match_array(expected_statuses.map { |status| status.id.to_s })
+    end
+  end
+
+  describe 'GET /api/v1/timelines/public' do
+    subject do
+      get '/api/v1/timelines/public', headers: headers, params: params
+    end
+
+    let!(:private_status) { Fabricate(:status, visibility: :private) } # rubocop:disable RSpec/LetSetup
+    let!(:local_status)   { Fabricate(:status, account: Fabricate.build(:account, domain: nil)) }
+    let!(:remote_status)  { Fabricate(:status, account: Fabricate.build(:account, domain: 'example.com')) }
+    let!(:media_status)   { Fabricate(:status, media_attachments: [Fabricate.build(:media_attachment)]) }
+
+    let(:params) { {} }
+
+    context 'when the instance allows public preview' do
+      let(:expected_statuses) { [local_status, remote_status, media_status] }
+
+      context 'with an authorized user' do
+        it_behaves_like 'a successful request to the public timeline'
+      end
+
+      context 'with an anonymous user' do
+        let(:headers) { {} }
+
+        it_behaves_like 'a successful request to the public timeline'
+      end
+
+      context 'with local param' do
+        let(:params) { { local: true } }
+        let(:expected_statuses) { [local_status, media_status] }
+
+        it_behaves_like 'a successful request to the public timeline'
+      end
+
+      context 'with remote param' do
+        let(:params) { { remote: true } }
+        let(:expected_statuses) { [remote_status] }
+
+        it_behaves_like 'a successful request to the public timeline'
+      end
+
+      context 'with only_media param' do
+        let(:params) { { only_media: true } }
+        let(:expected_statuses) { [media_status] }
+
+        it_behaves_like 'a successful request to the public timeline'
+      end
+
+      context 'with limit param' do
+        let(:params) { { limit: 1 } }
+
+        it 'returns only the requested number of statuses', :aggregate_failures do
+          subject
+
+          expect(response).to have_http_status(200)
+          expect(body_as_json.size).to eq(params[:limit])
+        end
+
+        it 'sets the correct pagination headers', :aggregate_failures do
+          subject
+
+          headers = response.headers['Link']
+
+          expect(headers.find_link(%w(rel prev)).href).to eq(api_v1_timelines_public_url(limit: 1, min_id: media_status.id.to_s))
+          expect(headers.find_link(%w(rel next)).href).to eq(api_v1_timelines_public_url(limit: 1, max_id: media_status.id.to_s))
+        end
+      end
+    end
+
+    context 'when the instance does not allow public preview' do
+      before do
+        Form::AdminSettings.new(timeline_preview: false).save
+      end
+
+      context 'with an authenticated user' do
+        let(:expected_statuses) { [local_status, remote_status, media_status] }
+
+        it_behaves_like 'a successful request to the public timeline'
+      end
+
+      context 'with an unauthenticated user' do
+        let(:headers) { {} }
+
+        it 'returns http unprocessable entity' do
+          subject
+
+          expect(response).to have_http_status(422)
+        end
+      end
+    end
+  end
+end