ruby - Why is this Sidekiq fake test not increasing the size of the jobs array? -

i have following test setup sidekiq test using fake testing in https://github.com/mperham/sidekiq/wiki/testing.

spec_helper.rb

require 'sidekiq/testing' sidekiq::testing.fake!  # see http://rubydoc.info/gems/rspec-core/rspec/core/configuration rspec.configure |config|   config.before(:suite)     factorygirl.reload     factorygirl.define       to_create { |instance| instance.save }     end     databasecleaner.strategy = :transaction     databasecleaner.clean_with(:truncation)     airbrake.configure |c|       c.project_id = env['airbrake_project_id']       c.project_key = env['airbrake_project_key']     end   end    config.before(:each, job: true)     sidekiq::worker.clear_all #make sure jobs don't linger between tests   end    config.around(:each) |example|     databasecleaner.cleaning       example.run     end   end    config.include factorygirl::syntax::methods end 

notification_spec.rb

require 'spec_helper'  rspec.describe notificationworker   "perform should call airbrake#notify", job: true     notification_worker = notificationworker.new     message = "this error message"     expect { notification_worker.perform(message) }.to change(notificationworker.jobs, :size).by(1)   end end 

notification_worker.rb

class notificationworker   include sidekiq::worker   sidekiq_options queue: :high    def perform(message)     airbrake.notify(message)   end end 

yet, why receive following error message:

failure/error: expect { notification_worker.perform(message) }.to change(notificationworker.jobs, :size).by(1)        expected #size have changed 1, changed 0 

it seems if jobs array should incremented 1. going on? threading issue caused interaction between rspec , database cleaner?

because it's calling perform method directly , not sidekiq's api.

try notificationworker.perform_async(message)