Make Api::V1::MutesController paginate properly (#8472)

Fixes #8463

spec/controllers/api/v1/mutes_controller_spec.rb

@@ -3,19 +3,61 @@ require 'rails_helper'
 RSpec.describe Api::V1::MutesController, type: :controller do
   render_views
 
-  let(:user)  { Fabricate(:user, account: Fabricate(:account, username: 'alice')) }
-  let(:token) { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: 'read:mutes') }
+  let(:user)   { Fabricate(:user, account: Fabricate(:account, username: 'alice')) }
+  let(:scopes) { 'read:mutes' }
+  let(:token)  { Fabricate(:accessible_access_token, resource_owner_id: user.id, scopes: scopes) }
 
-  before do
-    Fabricate(:mute, account: user.account, hide_notifications: false)
-    allow(controller).to receive(:doorkeeper_token) { token }
-  end
+  before { allow(controller).to receive(:doorkeeper_token) { token } }
 
   describe 'GET #index' do
-    it 'returns http success' do
+    it 'limits according to limit parameter' do
+      2.times.map { Fabricate(:mute, account: user.account) }
       get :index, params: { limit: 1 }
+      expect(body_as_json.size).to eq 1
+    end
 
+    it 'queries mutes in range according to max_id' do
+      mutes = 2.times.map { Fabricate(:mute, account: user.account) }
+
+      get :index, params: { max_id: mutes[1] }
+
+      expect(body_as_json.size).to eq 1
+      expect(body_as_json[0][:id]).to eq mutes[0].target_account_id.to_s
+    end
+
+    it 'queries mutes in range according to since_id' do
+      mutes = 2.times.map { Fabricate(:mute, account: user.account) }
+
+      get :index, params: { since_id: mutes[0] }
+
+      expect(body_as_json.size).to eq 1
+      expect(body_as_json[0][:id]).to eq mutes[1].target_account_id.to_s
+    end
+
+    it 'sets pagination header for next path' do
+      mutes = 2.times.map { Fabricate(:mute, account: user.account) }
+      get :index, params: { limit: 1, since_id: mutes[0] }
+      expect(response.headers['Link'].find_link(['rel', 'next']).href).to eq api_v1_mutes_url(limit: 1, max_id: mutes[1])
+    end
+
+    it 'sets pagination header for previous path' do
+      mute = Fabricate(:mute, account: user.account)
+      get :index
+      expect(response.headers['Link'].find_link(['rel', 'prev']).href).to eq api_v1_mutes_url(since_id: mute)
+    end
+
+    it 'returns http success' do
+      get :index
       expect(response).to have_http_status(200)
     end
+
+    context 'with wrong scopes' do
+      let(:scopes) { 'write:mutes' }
+
+      it 'returns http forbidden' do
+        get :index
+        expect(response).to have_http_status(403)
+      end
+    end
   end
 end