From a36b59be8ad7656b7ceab9751c9ec5b3563e3a30 Mon Sep 17 00:00:00 2001
From: Matt Jankowski <matt@jankowski.online>
Date: Mon, 13 Nov 2023 09:32:36 -0500
Subject: [PATCH] Spec coverage for `api/v1/trends` controllers (#27837)

---
 .../api/v1/trends/links_controller_spec.rb    | 38 +++++++++++++++--
 .../api/v1/trends/statuses_controller_spec.rb | 38 +++++++++++++++--
 .../api/v1/trends/tags_controller_spec.rb     | 41 +++++++++++++++----
 3 files changed, 101 insertions(+), 16 deletions(-)

diff --git a/spec/controllers/api/v1/trends/links_controller_spec.rb b/spec/controllers/api/v1/trends/links_controller_spec.rb
index 71a7e2e4774..12d4198aaf8 100644
--- a/spec/controllers/api/v1/trends/links_controller_spec.rb
+++ b/spec/controllers/api/v1/trends/links_controller_spec.rb
@@ -2,14 +2,44 @@
 
 require 'rails_helper'
 
-describe Api::V1::Trends::LinksController do
+RSpec.describe Api::V1::Trends::LinksController do
   render_views
 
   describe 'GET #index' do
-    it 'returns http success' do
-      get :index
+    around do |example|
+      previous = Setting.trends
+      example.run
+      Setting.trends = previous
+    end
 
-      expect(response).to have_http_status(200)
+    context 'when trends are disabled' do
+      before { Setting.trends = false }
+
+      it 'returns http success' do
+        get :index
+
+        expect(response).to have_http_status(200)
+      end
+    end
+
+    context 'when trends are enabled' do
+      before { Setting.trends = true }
+
+      it 'returns http success' do
+        prepare_trends
+        stub_const('Api::V1::Trends::LinksController::DEFAULT_LINKS_LIMIT', 2)
+        get :index
+
+        expect(response).to have_http_status(200)
+        expect(response.headers).to include('Link')
+      end
+
+      def prepare_trends
+        Fabricate.times(3, :preview_card, trendable: true, language: 'en').each do |link|
+          2.times { |i| Trends.links.add(link, i) }
+        end
+        Trends::Links.new(threshold: 1).refresh
+      end
     end
   end
 end
diff --git a/spec/controllers/api/v1/trends/statuses_controller_spec.rb b/spec/controllers/api/v1/trends/statuses_controller_spec.rb
index e9892bb1408..69fdb270d57 100644
--- a/spec/controllers/api/v1/trends/statuses_controller_spec.rb
+++ b/spec/controllers/api/v1/trends/statuses_controller_spec.rb
@@ -2,14 +2,44 @@
 
 require 'rails_helper'
 
-describe Api::V1::Trends::StatusesController do
+RSpec.describe Api::V1::Trends::StatusesController do
   render_views
 
   describe 'GET #index' do
-    it 'returns http success' do
-      get :index
+    around do |example|
+      previous = Setting.trends
+      example.run
+      Setting.trends = previous
+    end
 
-      expect(response).to have_http_status(200)
+    context 'when trends are disabled' do
+      before { Setting.trends = false }
+
+      it 'returns http success' do
+        get :index
+
+        expect(response).to have_http_status(200)
+      end
+    end
+
+    context 'when trends are enabled' do
+      before { Setting.trends = true }
+
+      it 'returns http success' do
+        prepare_trends
+        stub_const('Api::BaseController::DEFAULT_STATUSES_LIMIT', 2)
+        get :index
+
+        expect(response).to have_http_status(200)
+        expect(response.headers).to include('Link')
+      end
+
+      def prepare_trends
+        Fabricate.times(3, :status, trendable: true, language: 'en').each do |status|
+          2.times { |i| Trends.statuses.add(status, i) }
+        end
+        Trends::Statuses.new(threshold: 1, decay_threshold: -1).refresh
+      end
     end
   end
 end
diff --git a/spec/controllers/api/v1/trends/tags_controller_spec.rb b/spec/controllers/api/v1/trends/tags_controller_spec.rb
index 84370d84126..9311392cd9d 100644
--- a/spec/controllers/api/v1/trends/tags_controller_spec.rb
+++ b/spec/controllers/api/v1/trends/tags_controller_spec.rb
@@ -6,16 +6,41 @@ RSpec.describe Api::V1::Trends::TagsController do
   render_views
 
   describe 'GET #index' do
-    before do
-      Fabricate.times(10, :tag).each do |tag|
-        10.times { |i| Trends.tags.add(tag, i) }
-      end
-
-      get :index
+    around do |example|
+      previous = Setting.trends
+      example.run
+      Setting.trends = previous
     end
 
-    it 'returns http success' do
-      expect(response).to have_http_status(200)
+    context 'when trends are disabled' do
+      before { Setting.trends = false }
+
+      it 'returns http success' do
+        get :index
+
+        expect(response).to have_http_status(200)
+        expect(response.headers).to_not include('Link')
+      end
+    end
+
+    context 'when trends are enabled' do
+      before { Setting.trends = true }
+
+      it 'returns http success' do
+        prepare_trends
+        stub_const('Api::V1::Trends::TagsController::DEFAULT_TAGS_LIMIT', 2)
+        get :index
+
+        expect(response).to have_http_status(200)
+        expect(response.headers).to include('Link')
+      end
+
+      def prepare_trends
+        Fabricate.times(3, :tag, trendable: true).each do |tag|
+          2.times { |i| Trends.tags.add(tag, i) }
+        end
+        Trends::Tags.new(threshold: 1).refresh
+      end
     end
   end
 end