Rails / Rspec: How would I test #any? for Sidekiq? -

i have block:

def already_syncing?   sidekiq::queue.new(queue_name).any? { |q| q.args[0] == car_id } end 

how test this? if stub out this:

allow(sidekiq::queue).to receive_message_chain(:new, :any?) { true }

then condition in actual block not tested.

i think looking and_yield:

allow(sidekiq::queue).to receive_message_chain(:new, :any?).and_yield(<something>)

here's sample code/specs (with values/method calls didn't know stubbed out) can try , change see fit:

class synctest   def already_syncing?     sidekiq::queue.new(queue_name).any? { |q| q.args[0] == car_id }   end    private # values these methods below arbitrarily defined    def queue_name     'test'   end    def car_id     1   end end  rspec.describe synctest   let(:sync_test) { described_class.new }    describe '#already_syncing?'     let(:queue) { double('queue') }     let(:already_syncing) { sync_test.already_syncing? }      before       # don't have sidekiq available testing,       # it's generic class.       stub_const('sidekiq::queue', class.new)       allow(sidekiq::queue).to \         receive_message_chain(:new, :any?).and_yield(queue)     end      context "when queue's args[0] == car_id"       before         allow(queue).to receive(:args).and_return([1])       end        'returns true'         expect(already_syncing).to true       end     end      context "when queue's args[0] != car_id"       before         allow(queue).to receive(:args).and_return([0])       end        'returns false'         expect(already_syncing).to false       end     end   end end