Move `NotificationsController#index` test into their own `describe` block

spec/controllers/notifications_controller_spec.rb

@@ -3,39 +3,41 @@
 require "rails_helper"
 
 describe NotificationsController do
-  subject { get :index, params: { type: :new } }
+  describe "#index" do
+    subject { get :index, params: { type: :new } }
 
-  let(:user) { FactoryBot.create(:user) }
+    let(:user) { FactoryBot.create(:user) }
 
-  before do
-    sign_in(user)
-  end
-
-  context "user has no notifications" do
-    it "should show an empty list" do
-      subject
-      expect(response).to render_template(:index)
-
-      expect(controller.instance_variable_get(:@notifications)).to be_empty
-    end
-  end
-
-  context "user has notifications" do
-    let(:other_user) { FactoryBot.create(:user) }
-    let(:another_user) { FactoryBot.create(:user) }
-    let(:question) { FactoryBot.create(:question, user: user) }
-    let!(:answer) { FactoryBot.create(:answer, question: question, user: other_user) }
-    let!(:subscription) { Subscription.create(user: user, answer: answer) }
-    let!(:comment) { FactoryBot.create(:comment, answer: answer, user: other_user) }
-
-    it "should show a list of notifications" do
-      subject
-      expect(response).to render_template(:index)
-      expect(controller.instance_variable_get(:@notifications)).to have_attributes(size: 2)
+    before do
+      sign_in(user)
     end
 
-    it "marks notifications as read" do
-      expect { subject }.to change { Notification.for(user).where(new: true).count }.from(2).to(0)
+    context "user has no notifications" do
+      it "should show an empty list" do
+        subject
+        expect(response).to render_template(:index)
+
+        expect(controller.instance_variable_get(:@notifications)).to be_empty
+      end
+    end
+
+    context "user has notifications" do
+      let(:other_user) { FactoryBot.create(:user) }
+      let(:another_user) { FactoryBot.create(:user) }
+      let(:question) { FactoryBot.create(:question, user: user) }
+      let!(:answer) { FactoryBot.create(:answer, question: question, user: other_user) }
+      let!(:subscription) { Subscription.create(user: user, answer: answer) }
+      let!(:comment) { FactoryBot.create(:comment, answer: answer, user: other_user) }
+
+      it "should show a list of notifications" do
+        subject
+        expect(response).to render_template(:index)
+        expect(controller.instance_variable_get(:@notifications)).to have_attributes(size: 2)
+      end
+
+      it "marks notifications as read" do
+        expect { subject }.to change { Notification.for(user).where(new: true).count }.from(2).to(0)
+      end
     end
   end
 end