Assert on method calls instead of ActiveJob internals

ActiveJob argument serialization may change and cause spec failures

spec/lib/gitlab/background_migration/wrongfully_confirmed_email_unconfirmer_spec.rb

@@ -98,65 +98,26 @@ RSpec.describe Gitlab::BackgroundMigration::WrongfullyConfirmedEmailUnconfirmer,
   end
 
   context 'enqueued jobs' do
-    let(:user_1_gid) { User.find(user_needs_migration_1.id).to_gid.to_s }
-    let(:user_2_gid) { User.find(user_needs_migration_2.id).to_gid.to_s }
+    let(:user_1) { User.find(user_needs_migration_1.id) }
+    let(:user_2) { User.find(user_needs_migration_2.id) }
 
-    let(:email_1_gid) { Email.find(bad_email_1.id).to_gid.to_s }
-    let(:email_2_gid) { Email.find(bad_email_2.id).to_gid.to_s }
+    let(:email_1) { Email.find(bad_email_1.id) }
+    let(:email_2) { Email.find(bad_email_2.id) }
 
     it 'enqueues the email confirmation and the unconfirm notification mailer jobs' do
+      allow(DeviseMailer).to receive(:confirmation_instructions).and_call_original
+      allow(Gitlab::BackgroundMigration::Mailers::UnconfirmMailer).to receive(:unconfirm_notification_email).and_call_original
+
       subject
 
-      expect(enqueued_jobs.size).to eq(6)
-
-      expected_job_arguments = [
-        [
-          'DeviseMailer',
-          'confirmation_instructions',
-          'deliver_now',
-          { "_aj_globalid" => email_1_gid },
-          bad_email_1.reload.confirmation_token
-        ],
-        [
-          'DeviseMailer',
-          'confirmation_instructions',
-          'deliver_now',
-          { "_aj_globalid" => email_2_gid },
-          bad_email_2.reload.confirmation_token
-        ],
-        [
-          'DeviseMailer',
-          'confirmation_instructions',
-          'deliver_now',
-          { "_aj_globalid" => user_1_gid },
-          user_needs_migration_1.reload.confirmation_token
-        ],
-        [
-          'Gitlab::BackgroundMigration::Mailers::UnconfirmMailer',
-          'unconfirm_notification_email',
-          'deliver_now',
-          { "_aj_globalid" => user_1_gid }
-        ],
-        [
-          'DeviseMailer',
-          'confirmation_instructions',
-          'deliver_now',
-          { "_aj_globalid" => user_2_gid },
-          user_needs_migration_2.reload.confirmation_token
-        ],
-        [
-          'Gitlab::BackgroundMigration::Mailers::UnconfirmMailer',
-          'unconfirm_notification_email',
-          'deliver_now',
-          { "_aj_globalid" => user_2_gid }
-        ]
-      ]
-
-      all_job_arguments = enqueued_jobs.map { |job| job["arguments"] }
-
-      expected_job_arguments.each do |job_arguments|
-        expect(all_job_arguments).to include(job_arguments)
-      end
+      expect(DeviseMailer).to have_received(:confirmation_instructions).with(email_1, email_1.confirmation_token)
+      expect(DeviseMailer).to have_received(:confirmation_instructions).with(email_2, email_2.confirmation_token)
+
+      expect(Gitlab::BackgroundMigration::Mailers::UnconfirmMailer).to have_received(:unconfirm_notification_email).with(user_1)
+      expect(DeviseMailer).to have_received(:confirmation_instructions).with(user_1, user_1.confirmation_token)
+
+      expect(Gitlab::BackgroundMigration::Mailers::UnconfirmMailer).to have_received(:unconfirm_notification_email).with(user_2)
+      expect(DeviseMailer).to have_received(:confirmation_instructions).with(user_2, user_2.confirmation_token)
     end
   end
 end