Cleanup invitation_reminders experiment code

The experiment has proven successful, now
enable it by default.

app/controllers/invites_controller.rb

@@ -20,7 +20,6 @@ class InvitesController < ApplicationController
 
   def accept
     if member.accept_invite!(current_user)
-      track_invitation_reminders_experiment('accepted')
       redirect_to invite_details[:path], notice: _("You have been granted %{member_human_access} access to %{title} %{name}.") %
         { member_human_access: member.human_access, title: invite_details[:title], name: invite_details[:name] }
     else
@@ -107,8 +106,4 @@ class InvitesController < ApplicationController
                           }
                         end
   end
-
-  def track_invitation_reminders_experiment(action)
-    track_experiment_event(:invitation_reminders, action, subject: member)
-  end
 end

app/mailers/emails/members.rb

@@ -63,15 +63,6 @@ module Emails
         subject: subject_line,
         layout: 'unknown_user_mailer'
       )
-
-      if Gitlab::Experimentation.active?(:invitation_reminders)
-        Gitlab::Tracking.event(
-          Gitlab::Experimentation.get_experiment(:invitation_reminders).tracking_category,
-          'sent',
-          property: Gitlab::Experimentation.in_experiment_group?(:invitation_reminders, subject: member.invite_email) ? 'experimental_group' : 'control_group',
-          label: Digest::MD5.hexdigest(member.to_global_id.to_s)
-        )
-      end
     end
 
     def member_invited_reminder_email(member_source_type, member_id, token, reminder_index)

app/services/members/invitation_reminder_email_service.rb

@@ -14,8 +14,6 @@ module Members
     end
 
     def execute
-      return unless experiment_enabled?
-
       reminder_index = days_on_which_to_send_reminders.index(days_after_invitation_sent)
       return unless reminder_index
 
@@ -24,10 +22,6 @@ module Members
 
     private
 
-    def experiment_enabled?
-      Gitlab::Experimentation.in_experiment_group?(:invitation_reminders, subject: invitation.invite_email)
-    end
-
     def days_after_invitation_sent
       (Date.today - invitation.created_at.to_date).to_i
     end

app/workers/member_invitation_reminder_emails_worker.rb

@@ -8,8 +8,6 @@ class MemberInvitationReminderEmailsWorker # rubocop:disable Scalability/Idempot
   urgency :low
 
   def perform
-    return unless Gitlab::Experimentation.active?(:invitation_reminders)
-
     Member.not_accepted_invitations.not_expired.last_ten_days_excluding_today.find_in_batches do |invitations|
       invitations.each do |invitation|
         Members::InvitationReminderEmailService.new(invitation).execute

changelogs/unreleased/cleanup-invitation-reminders-experiment.yml

+---
+title: Add invitation reminders
+merge_request: 47920
+author:
+type: added

doc/user/project/members/index.md

@@ -96,6 +96,9 @@ invitation, change their access level, or even delete them.
 
 ![Invite user members list](img/add_user_email_accept.png)
 
+While unaccepted, the system will automatically send reminder emails on the second, fifth,
+and tenth day after the invitation was initially sent.
+
 After the user accepts the invitation, they are prompted to create a new
 GitLab account using the same e-mail address the invitation was sent to.
 

lib/gitlab/experimentation.rb

@@ -66,10 +66,6 @@ module Gitlab
         tracking_category: 'Growth::Acquisition::Experiment::InviteEmail',
         use_backwards_compatible_subject_index: true
       },
-      invitation_reminders: {
-        tracking_category: 'Growth::Acquisition::Experiment::InvitationReminders',
-        use_backwards_compatible_subject_index: true
-      },
       group_only_trials: {
         tracking_category: 'Growth::Conversion::Experiment::GroupOnlyTrials',
         use_backwards_compatible_subject_index: true

spec/controllers/invites_controller_spec.rb

@@ -22,43 +22,6 @@ RSpec.describe InvitesController, :snowplow do
     end
   end
 
-  shared_examples "tracks the 'accepted' event for the invitation reminders experiment" do
-    before do
-      stub_experiment(invitation_reminders: true)
-      stub_experiment_for_subject(invitation_reminders: experimental_group)
-    end
-
-    context 'when in the control group' do
-      let(:experimental_group) { false }
-
-      it "tracks the 'accepted' event" do
-        request
-
-        expect_snowplow_event(
-          category: 'Growth::Acquisition::Experiment::InvitationReminders',
-          label: md5_member_global_id,
-          property: 'control_group',
-          action: 'accepted'
-        )
-      end
-    end
-
-    context 'when in the experimental group' do
-      let(:experimental_group) { true }
-
-      it "tracks the 'accepted' event" do
-        request
-
-        expect_snowplow_event(
-          category: 'Growth::Acquisition::Experiment::InvitationReminders',
-          label: md5_member_global_id,
-          property: 'experimental_group',
-          action: 'accepted'
-        )
-      end
-    end
-  end
-
   describe 'GET #show' do
     subject(:request) { get :show, params: params }
 
@@ -87,7 +50,6 @@ RSpec.describe InvitesController, :snowplow do
         expect(flash[:notice]).to be_nil
       end
 
-      it_behaves_like "tracks the 'accepted' event for the invitation reminders experiment"
       it_behaves_like 'invalid token'
     end
 
@@ -119,7 +81,6 @@ RSpec.describe InvitesController, :snowplow do
 
     subject(:request) { post :accept, params: params }
 
-    it_behaves_like "tracks the 'accepted' event for the invitation reminders experiment"
     it_behaves_like 'invalid token'
   end
 

spec/lib/gitlab/experimentation_spec.rb

@@ -16,7 +16,6 @@ RSpec.describe Gitlab::Experimentation::EXPERIMENTS do
       :contact_sales_btn_in_app,
       :customize_homepage,
       :invite_email,
-      :invitation_reminders,
       :group_only_trials,
       :default_to_issues_board
     ]

spec/mailers/notify_spec.rb

@@ -1450,38 +1450,6 @@ RSpec.describe Notify do
 
       subject { described_class.member_invited_email('Group', group_member.id, group_member.invite_token) }
 
-      shared_examples "tracks the 'sent' event for the invitation reminders experiment" do
-        before do
-          stub_experiment(invitation_reminders: true)
-          allow(Gitlab::Experimentation).to receive(:in_experiment_group?).with(:invitation_reminders, subject: group_member.invite_email).and_return(experimental_group)
-        end
-
-        it "tracks the 'sent' event", :snowplow do
-          subject.deliver_now
-
-          expect_snowplow_event(
-            category: 'Growth::Acquisition::Experiment::InvitationReminders',
-            label: Digest::MD5.hexdigest(group_member.to_global_id.to_s),
-            property: experimental_group ? 'experimental_group' : 'control_group',
-            action: 'sent'
-          )
-        end
-      end
-
-      describe 'tracking for the invitation reminders experiment' do
-        context 'when invite email is in the experimental group' do
-          let(:experimental_group) { true }
-
-          it_behaves_like "tracks the 'sent' event for the invitation reminders experiment"
-        end
-
-        context 'when invite email is in the control group' do
-          let(:experimental_group) { false }
-
-          it_behaves_like "tracks the 'sent' event for the invitation reminders experiment"
-        end
-      end
-
       it_behaves_like 'an email sent from GitLab'
       it_behaves_like 'it should not have Gmail Actions links'
       it_behaves_like "a user cannot unsubscribe through footer link"

spec/services/members/invitation_reminder_email_service_spec.rb

@@ -9,24 +9,7 @@ RSpec.describe Members::InvitationReminderEmailService do
     let_it_be(:frozen_time) { Date.today.beginning_of_day }
     let_it_be(:invitation) { build(:group_member, :invited, created_at: frozen_time) }
 
-    context 'when the experiment is disabled' do
     before do
-        allow(Gitlab::Experimentation).to receive(:in_experiment_group?).and_return(false)
-        invitation.expires_at = frozen_time + 2.days
-      end
-
-      it 'does not send an invitation' do
-        travel_to(frozen_time + 1.day) do
-          expect(invitation).not_to receive(:send_invitation_reminder)
-
-          subject
-        end
-      end
-    end
-
-    context 'when the experiment is enabled' do
-      before do
-        allow(Gitlab::Experimentation).to receive(:in_experiment_group?).and_return(true)
       invitation.expires_at = frozen_time + expires_at_days.days if expires_at_days
     end
 
@@ -74,5 +57,4 @@ RSpec.describe Members::InvitationReminderEmailService do
       end
     end
   end
-  end
 end

spec/workers/member_invitation_reminder_emails_worker_spec.rb

@@ -10,23 +10,6 @@ RSpec.describe MemberInvitationReminderEmailsWorker do
       create(:group_member, :invited, created_at: 2.days.ago)
     end
 
-    context 'feature flag disabled' do
-      before do
-        stub_experiment(invitation_reminders: false)
-      end
-
-      it 'does not attempt to execute the invitation reminder service' do
-        expect(Members::InvitationReminderEmailService).not_to receive(:new)
-
-        subject
-      end
-    end
-
-    context 'feature flag enabled' do
-      before do
-        stub_experiment(invitation_reminders: true)
-      end
-
     it 'executes the invitation reminder email service' do
       expect_next_instance_of(Members::InvitationReminderEmailService) do |service|
         expect(service).to receive(:execute)
@@ -35,5 +18,4 @@ RSpec.describe MemberInvitationReminderEmailsWorker do
       subject
     end
   end
-  end
 end