Restore pagination to admin abuse reports

app/views/admin/abuse_reports/index.html.haml

@@ -12,6 +12,7 @@
             %th.wide Message
             %th Action
         = render @abuse_reports
+    = paginate @abuse_reports, theme: 'gitlab'
   - else
     .empty-state
       .text-center

changelogs/unreleased/28059-add-pagination-to-admin-abuse-reports.yml

@@ -0,0 +1,4 @@
+---
+title: Restore pagination to admin abuse reports
+merge_request:
+author:

spec/features/admin/admin_abuse_reports_spec.rb

@@ -30,5 +30,24 @@ describe "Admin::AbuseReports", feature: true, js: true  do
         end
       end
     end
+
+    describe 'if a many users have been reported for abuse' do
+      let(:report_count) { AbuseReport.default_per_page + 3 }
+
+      before do
+        report_count.times do
+          create(:abuse_report, user: create(:user))
+        end
+      end
+
+      describe 'in the abuse report view' do
+        it 'presents information about abuse report' do
+          visit admin_abuse_reports_path
+
+          expect(page).to have_selector('.pagination')
+          expect(page).to have_selector('.pagination .page', count: (report_count.to_f / AbuseReport.default_per_page).ceil)
+        end
+      end
+    end
   end
 end