GRN2-6: Notify admins when a approve/invite user signs up (#538)

* Notify admins when a approve/invite user signs up

* Fix formating

* Uses admins_url variable

spec/controllers/sessions_controller_spec.rb

@@ -223,6 +223,36 @@ describe SessionsController, type: :controller do
 
         expect(response).to redirect_to(root_path)
       end
+
+      context 'registration notification emails' do
+        before do
+          allow(Rails.configuration).to receive(:enable_email_verification).and_return(true)
+          @user = create(:user, provider: "greenlight")
+          @admin = create(:user, provider: "greenlight", email: "test@example.com")
+          @admin.add_role :admin
+        end
+
+        it "should notify admin on new user signup with approve/reject registration" do
+          allow_any_instance_of(Registrar).to receive(:approval_registration).and_return(true)
+
+          request.env["omniauth.auth"] = OmniAuth.config.mock_auth[:bn_launcher]
+
+          expect { get :omniauth, params: { provider: 'bn_launcher' } }
+            .to change { ActionMailer::Base.deliveries.count }.by(1)
+        end
+
+        it "should notify admin on new user signup with invite registration" do
+          allow_any_instance_of(Registrar).to receive(:invite_registration).and_return(true)
+
+          invite = Invitation.create(email: "user@google.com", provider: "greenlight")
+          @request.session[:invite_token] = invite.invite_token
+
+          request.env["omniauth.auth"] = OmniAuth.config.mock_auth[:bn_launcher]
+
+          expect { get :omniauth, params: { provider: 'bn_launcher' } }
+            .to change { ActionMailer::Base.deliveries.count }.by(1)
+        end
+      end
     end
 
     it "should not create session without omniauth env set for bn_launcher" do