require 'spec_helper' describe Gitlab::Middleware::RailsQueueDuration do let(:app) { double(:app) } let(:middleware) { described_class.new(app) } let(:env) { {} } let(:transaction) { double(:transaction) } before do expect(app).to receive(:call).with(env).and_return('yay') end describe '#call' do it 'calls the app when metrics are disabled' do expect(Gitlab::Metrics).to receive(:current_transaction).and_return(nil) expect(middleware.call(env)).to eq('yay') end context 'when metrics are enabled' do before do allow(Gitlab::Metrics).to receive(:current_transaction).and_return(transaction) end it 'calls the app when metrics are enabled but no timing header is found' do expect(middleware.call(env)).to eq('yay') end it 'sets proxy_flight_time and calls the app when the header is present' do env['HTTP_GITLAB_WORKHORSE_PROXY_START'] = '123' expect(transaction).to receive(:set).with(:rails_queue_duration, an_instance_of(Float)) expect(middleware.call(env)).to eq('yay') end end end end