Migrate to request specs in /api/v1/timelines/tag/:hashtag

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

@@ -0,0 +1,112 @@
+# frozen_string_literal: true
+
+require 'rails_helper'
+
+RSpec.describe 'Tag' 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 tag timeline' do
+    it 'returns the expected statuses', :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/tag/:hashtag' do
+    subject do
+      get "/api/v1/timelines/tag/#{hashtag}", headers: headers, params: params
+    end
+
+    let(:account)         { Fabricate(:account) }
+    let!(:private_status) { PostStatusService.new.call(account, visibility: :private, text: '#life could be a dream') } # rubocop:disable RSpec/LetSetup
+    let!(:life_status)    { PostStatusService.new.call(account, text: 'tell me what is my #life without your #love') }
+    let!(:war_status)     { PostStatusService.new.call(user.account, text: '#war, war never changes') }
+    let!(:love_status)    { PostStatusService.new.call(account, text: 'what is #love?') }
+    let(:params)          { {} }
+    let(:hashtag)         { 'life' }
+
+    context 'when given only one hashtag' do
+      let(:expected_statuses) { [life_status] }
+
+      it_behaves_like 'a successful request to the tag timeline'
+    end
+
+    context 'with any param' do
+      let(:expected_statuses) { [life_status, love_status] }
+      let(:params)            { { any: %(love) } }
+
+      it_behaves_like 'a successful request to the tag timeline'
+    end
+
+    context 'with all param' do
+      let(:expected_statuses) { [life_status] }
+      let(:params)            { { all: %w(love) } }
+
+      it_behaves_like 'a successful request to the tag timeline'
+    end
+
+    context 'with none param' do
+      let(:expected_statuses) { [war_status] }
+      let(:hashtag)           { 'war' }
+      let(:params)            { { none: %w(life love) } }
+
+      it_behaves_like 'a successful request to the tag timeline'
+    end
+
+    context 'with limit param' do
+      let(:hashtag) { 'love' }
+      let(:params)  { { limit: 1 } }
+
+      it 'returns only the requested number of statuses' do
+        subject
+
+        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_tag_url(limit: 1, min_id: love_status.id.to_s))
+        expect(headers.find_link(%w(rel next)).href).to eq(api_v1_timelines_tag_url(limit: 1, max_id: love_status.id.to_s))
+      end
+    end
+
+    context 'when the instance allows public preview' do
+      context 'when the user is not authenticated' do
+        let(:headers) { {} }
+        let(:expected_statuses) { [life_status] }
+
+        it_behaves_like 'a successful request to the tag timeline'
+      end
+    end
+
+    context 'when the instance does not allow public preview' do
+      before do
+        Form::AdminSettings.new(timeline_preview: false).save
+      end
+
+      context 'when the user is not authenticated' do
+        let(:headers) { {} }
+
+        it 'returns http unauthorized' do
+          subject
+
+          expect(response).to have_http_status(401)
+        end
+      end
+
+      context 'when the user is authenticated' do
+        let(:expected_statuses) { [life_status] }
+
+        it_behaves_like 'a successful request to the tag timeline'
+      end
+    end
+  end
+end