Fix order of paginated accounts in FollowerDomainsController and spec (#3357)

* Fix order of paginated accounts in FollowerDomainsController

Unordered pagination could result in unexpected behavior.

* Cover Settings::FollowerDomainsController more

spec/controllers/settings/follower_domains_controller_spec.rb

@@ -5,15 +5,41 @@ describe Settings::FollowerDomainsController do
 
   let(:user) { Fabricate(:user) }
 
-  before do
-    sign_in user, scope: :user
+  shared_examples 'authenticate user' do
+    it 'redirects when not signed in' do
+      is_expected.to redirect_to '/auth/sign_in'
+    end
   end
 
   describe 'GET #show' do
+    subject { get :show, params: { page: 2 } }
+
+    it 'assigns @account' do
+      sign_in user, scope: :user
+      subject
+      expect(assigns(:account)).to eq user.account
+    end
+
+    it 'assigns @domains' do
+      Fabricate(:account, domain: 'old').follow!(user.account)
+      Fabricate(:account, domain: 'recent').follow!(user.account)
+
+      sign_in user, scope: :user
+      subject
+
+      assigned = assigns(:domains).per(1).to_a
+      expect(assigned.size).to eq 1
+      expect(assigned[0].accounts_from_domain).to eq 1
+      expect(assigned[0].domain).to eq 'old'
+    end
+
     it 'returns http success' do
-      get :show
+      sign_in user, scope: :user
+      subject
       expect(response).to have_http_status(:success)
     end
+
+    include_examples 'authenticate user'
   end
 
   describe 'PATCH #update' do
@@ -21,16 +47,39 @@ describe Settings::FollowerDomainsController do
 
     before do
       stub_request(:post, 'http://example.com/salmon').to_return(status: 200)
-      poopfeast.follow!(user.account)
-      patch :update, params: { select: ['example.com'] }
     end
 
-    it 'redirects back to followers page' do
-      expect(response).to redirect_to(settings_follower_domains_path)
+    shared_examples 'redirects back to followers page' do |notice|
+      it 'redirects back to followers page' do
+        poopfeast.follow!(user.account)
+
+        sign_in user, scope: :user
+        subject
+
+        expect(flash[:notice]).to eq notice
+        expect(response).to redirect_to(settings_follower_domains_path)
+      end
     end
 
-    it 'soft-blocks followers from selected domains' do
-      expect(poopfeast.following?(user.account)).to be false
+    context 'when select parameter is not provided' do
+      subject { patch :update }
+      include_examples 'redirects back to followers page', 'In the process of soft-blocking followers from 0 domains...'
+    end
+
+    context 'when select parameter is provided' do
+      subject { patch :update, params: { select: ['example.com'] } }
+
+      it 'soft-blocks followers from selected domains' do
+        poopfeast.follow!(user.account)
+
+        sign_in user, scope: :user
+        subject
+
+        expect(poopfeast.following?(user.account)).to be false
+      end
+
+      include_examples 'authenticate user'
+      include_examples 'redirects back to followers page', 'In the process of soft-blocking followers from one domain...'
     end
   end
 end