Add test case for scheduling runners tokens migration

spec/lib/gitlab/crypto_helper_spec.rb

@@ -15,7 +15,6 @@ describe Gitlab::CryptoHelper do
       encrypted = described_class.aes256_gcm_encrypt('some-value')
 
       expect(encrypted).to match %r{^[A-Za-z0-9+/=]+$}
-      expect(encrypted).to eq encrypted.strip
     end
   end
 

spec/migrations/schedule_runners_token_encryption_spec.rb

+require 'spec_helper'
+require Rails.root.join('db', 'post_migrate', '20181121111200_schedule_runners_token_encryption')
+
+describe ScheduleRunnersTokenEncryption, :migration do
+  let(:settings) { table(:application_settings) }
+  let(:namespaces) { table(:namespaces) }
+  let(:projects) { table(:projects) }
+  let(:runners) { table(:ci_runners) }
+
+  before do
+    stub_const("#{described_class.name}::BATCH_SIZE", 1)
+
+    settings.create!(id: 1, runners_registration_token: 'plain-text-token1')
+    namespaces.create!(id: 11, name: 'gitlab', path: 'gitlab-org', runners_token: 'my-token1')
+    namespaces.create!(id: 12, name: 'gitlab', path: 'gitlab-org', runners_token: 'my-token2')
+    projects.create!(id: 111, namespace_id: 11, name: 'gitlab', path: 'gitlab-ce', runners_token: 'my-token1')
+    projects.create!(id: 114, namespace_id: 11, name: 'gitlab', path: 'gitlab-ce', runners_token: 'my-token2')
+    runners.create!(id: 201, runner_type: 1, token: 'plain-text-token1')
+    runners.create!(id: 202, runner_type: 1, token: 'plain-text-token2')
+  end
+
+  it 'schedules runners token encryption migration for multiple resources' do
+    Sidekiq::Testing.fake! do
+      Timecop.freeze do
+        migrate!
+
+        expect(BackgroundMigrationWorker.jobs.size).to eq 7
+      end
+    end
+  end
+end