Improve authentication activity code readability

config/initializers/warden.rb

@@ -2,16 +2,18 @@ Rails.application.configure do |config|
   Warden::Manager.after_set_user(scope: :user) do |user, auth, opts|
     Gitlab::Auth::UniqueIpsLimiter.limit_user!(user)
+    activity = Gitlab::Auth::Activity.new(user, opts)
+
     case opts[:event]
     when :authentication
-      Gitlab::Auth::Activity.new(user, opts).user_authenticated!
+      activity.user_authenticated!
     when :set_user
-      Gitlab::Auth::Activity.new(user, opts).user_authenticated!
-      Gitlab::Auth::Activity.new(user, opts).user_session_override!
+      activity.user_authenticated!
+      activity.user_session_override!
     when :fetch # rubocop:disable Lint/EmptyWhen
       # We ignore session fetch events
     else
-      Gitlab::Auth::Activity.new(user, opts).user_session_override!
+      activity.user_session_override!
     end
   end

lib/gitlab/auth/activity.rb

@@ -7,15 +7,15 @@ module Gitlab
       extend Gitlab::Utils::StrongMemoize
       COUNTERS = {
-        user_authenticated: 'Counter of total successful authentication events',
-        user_unauthenticated: 'Counter of total authentication failures',
-        user_not_found: 'Counter of total failed log-ins when user is unknown',
+        user_authenticated: 'Counter of successful authentication events',
+        user_unauthenticated: 'Counter of authentication failures',
+        user_not_found: 'Counter of failed log-ins when user is unknown',
         user_password_invalid: 'Counter of failed log-ins with invalid password',
         user_session_override: 'Counter of manual log-ins and sessions overrides',
-        user_session_destroyed: 'Counter of total user sessions being destroyed',
+        user_session_destroyed: 'Counter of user sessions being destroyed',
         user_two_factor_authenticated: 'Counter of two factor authentications',
         user_sessionless_authentication: 'Counter of sessionless authentications',
-        user_blocked: 'Counter of total sign in attempts when user is blocked'
+        user_blocked: 'Counter of sign in attempts when user is blocked'
       }.freeze
       def initialize(user, opts)

spec/features/users/login_spec.rb

@@ -159,6 +159,7 @@ describe 'Login' do
         it 'blocks login with invalid code' do
           # TODO invalid 2FA code does not generate any events
+          # See gitlab-org/gitlab-ce#49785
           enter_code('foo')
@@ -233,7 +234,7 @@ describe 'Login' do
         context 'with invalid code' do
           it 'blocks login' do
             # TODO, invalid two factor authentication does not increment
-            # metrics / counters
+            # metrics / counters, see gitlab-org/gitlab-ce#49785
             code = codes.sample
             expect(user.invalidate_otp_backup_code!(code)).to eq true
@@ -267,7 +268,8 @@ describe 'Login' do
         end
         it 'signs user in without prompting for second factor' do
-          # TODO, OAuth authentication does not fire events
+          # TODO, OAuth authentication does not fire events,
+          # see gitlab-org/gitlab-ce#49786
           expect(authentication_metrics)
             .to increment(:user_authenticated_counter)

spec/support/helpers/stub_metrics.rb

@@ -5,9 +5,8 @@ module StubMetrics
   def stub_authentication_activity_metrics(debug: false)
     authentication_metrics.each_counter do |name, metric, description|
-      double("#{metric} - #{description}").tap do |counter|
-        allow(authentication_metrics).to receive(name).and_return(counter)
-      end
+      allow(authentication_metrics).to receive(name)
+        .and_return(double("#{metric} - #{description}"))
     end
     debug_authentication_activity_metrics if debug