Only grant access to Admin Audit Log when feature available

Only when the license allows Admin Audit Log, show the Audit Log
button on the Admin page and make it possible to visit that
page (return 404 otherwise).

app/controllers/admin/audit_logs_controller.rb

 class Admin::AuditLogsController < Admin::ApplicationController
+  before_action :check_license_admin_audit_log_available!
+
   def index
     @events = LogFinder.new(audit_logs_params).execute
     @entity = case audit_logs_params[:event_type]
@@ -16,4 +18,8 @@ class Admin::AuditLogsController < Admin::ApplicationController
   def audit_logs_params
     params.permit(:page, :event_type, :user_id, :project_id, :group_id)
   end
+
+  def check_license_admin_audit_log_available!
+    render_404 unless License.feature_available?(:admin_audit_log)
+  end
 end

app/views/admin/monitoring/_head.html.haml

@@ -27,7 +27,4 @@
           = link_to admin_requests_profiles_path, title: 'Requests Profiles' do
             %span
               Requests Profiles
-        = nav_link path: 'audit_logs#index' do
-          = link_to admin_audit_logs_path, title: 'Audit Log' do
-            %span
-              Audit Log
+        = render 'admin/monitoring/ee/nav'

app/views/admin/monitoring/ee/_nav.html.haml

+- if License.feature_available?(:admin_audit_log)
+  = nav_link path: 'audit_logs#index' do
+    = link_to admin_audit_logs_path, title: 'Audit Log' do
+      %span
+        Audit Log

spec/features/admin/admin_audit_logs_spec.rb

@@ -9,75 +9,99 @@ describe 'Admin::AuditLogs', feature: true, js: true do
     sign_in(create(:admin))
   end
 
-  describe 'user events' do
+  context 'unlicensed' do
     before do
-      AuditEventService.new(user, user, with: :ldap)
-        .for_authentication.security_event
+      stub_licensed_features(admin_audit_log: false)
+    end
 
+    it 'returns 404' do
       visit admin_audit_logs_path
+
+      expect(page.status_code).to eq(404)
     end
+  end
 
-    it 'filters by user' do
-      filter_by_type('User Events')
+  context 'licensed' do
+    before do
+      stub_licensed_features(admin_audit_log: true)
+    end
 
-      click_button 'User'
-      wait_for_requests
+    it 'has Audit Log button in head nav bar' do
+      visit admin_audit_logs_path
 
-      within '.dropdown-menu-user' do
-        click_link user.name
+      expect(page).to have_link('Audit Log', href: admin_audit_logs_path)
+    end
+
+    describe 'user events' do
+      before do
+        AuditEventService.new(user, user, with: :ldap)
+          .for_authentication.security_event
+
+        visit admin_audit_logs_path
       end
 
-      wait_for_requests
+      it 'filters by user' do
+        filter_by_type('User Events')
 
-      expect(page).to have_content('Signed in with LDAP authentication')
-    end
-  end
+        click_button 'User'
+        wait_for_requests
 
-  describe 'group events' do
-    let(:group_member) { create(:group_member, user: user) }
+        within '.dropdown-menu-user' do
+          click_link user.name
+        end
 
-    before do
-      AuditEventService.new(user, group_member.group, { action: :create })
-        .for_member(group_member).security_event
+        wait_for_requests
 
-      visit admin_audit_logs_path
+        expect(page).to have_content('Signed in with LDAP authentication')
+      end
     end
 
-    it 'filters by group' do
-      filter_by_type('Group Events')
+    describe 'group events' do
+      let(:group_member) { create(:group_member, user: user) }
 
-      click_button 'Group'
-      find('.group-item-select').click
-      wait_for_requests
-      find('.select2-results').click
+      before do
+        AuditEventService.new(user, group_member.group, { action: :create })
+          .for_member(group_member).security_event
 
-      find('#events-table td', match: :first)
+        visit admin_audit_logs_path
+      end
 
-      expect(page).to have_content('Added user access as Owner')
-    end
-  end
+      it 'filters by group' do
+        filter_by_type('Group Events')
 
-  describe 'project events' do
-    let(:project_member) { create(:project_member, user: user) }
+        click_button 'Group'
+        find('.group-item-select').click
+        wait_for_requests
+        find('.select2-results').click
 
-    before do
-      AuditEventService.new(user, project_member.project, { action: :destroy })
-        .for_member(project_member).security_event
+        find('#events-table td', match: :first)
 
-      visit admin_audit_logs_path
+        expect(page).to have_content('Added user access as Owner')
+      end
     end
 
-    it 'filters by project' do
-      filter_by_type('Project Events')
+    describe 'project events' do
+      let(:project_member) { create(:project_member, user: user) }
+
+      before do
+        AuditEventService.new(user, project_member.project, { action: :destroy })
+          .for_member(project_member).security_event
+
+        visit admin_audit_logs_path
+      end
+
+      it 'filters by project' do
+        filter_by_type('Project Events')
 
-      click_button 'Project'
-      find('.project-item-select').click
-      wait_for_requests
-      find('.select2-results').click
+        click_button 'Project'
+        find('.project-item-select').click
+        wait_for_requests
+        find('.select2-results').click
 
-      find('#events-table td', match: :first)
+        find('#events-table td', match: :first)
 
-      expect(page).to have_content('Removed user access')
+        expect(page).to have_content('Removed user access')
+      end
     end
   end