add spec for application_job

- tests request_id manipulation around queues
- tests attaching activejob_id and request_id to logs

Author: jason-raitz

spec/jobs/application_job_spec.rb

@@ -0,0 +1,81 @@
+require 'rails_helper'
+
+class TestJob < ApplicationJob
+  def perform(*args); end
+end
+
+RSpec.describe ApplicationJob, type: :job do
+  include ActiveJob::TestHelper
+
+  # # not sure if needed
+  # around do |example|
+  #   original_log_level = Rails.logger.level
+  #   Rails.logger.level = :debug
+  #   example.run
+  #   Rails.logger.level = original_log_level
+  # end
+
+  after do
+    ActiveJob::Base.queue_adapter.enqueued_jobs.clear
+  end
+
+  describe 'jobs with request_id' do
+    let(:request_id) { SecureRandom.uuid }
+
+    context 'when Current.request_id is set' do
+      before do
+        Current.request_id = request_id
+      end
+
+      it 'enqueues the job with the request_id' do
+        expect do
+          TestJob.perform_later('some_arg')
+        end.to have_enqueued_job(TestJob).with('some_arg', { request_id: request_id })
+      end
+
+      it 'sets @request_id and removes it from the arguments' do
+        job = TestJob.new('some_arg', { request_id: request_id })
+        perform_enqueued_jobs { job.perform_now }
+
+        expect(job.instance_variable_get(:@request_id)).to eq(request_id)
+        expect(job.arguments).to eq(['some_arg'])
+      end
+
+      it 'logs the activejob_id and request_id' do
+        job = TestJob.new('some_arg', { request_id: request_id })
+        allow(job.logger).to receive(:with_fields=)
+
+        perform_enqueued_jobs { job.perform_now }
+
+        expect(job.logger).to have_received(:with_fields=).with(hash_including(activejob_id: job.job_id, request_id: request_id))
+      end
+    end
+  end
+
+  describe 'jobs without a request_id' do
+    context 'when Current.request_id is not set' do
+      it 'enqueues the job without a request_id' do
+        expect do
+          TestJob.perform_later('some_arg')
+        end.to have_enqueued_job(TestJob).with('some_arg')
+      end
+
+      it 'does not set @request_id if not provided' do
+        job = TestJob.new('some_arg')
+        perform_enqueued_jobs { job.perform_now }
+
+        expect(job.instance_variable_get(:@request_id)).to be_nil
+        expect(job.arguments).to eq(['some_arg'])
+      end
+
+      it 'logs the activejob_id without a request_id' do
+        job = TestJob.new('some_arg')
+        allow(job.logger).to receive(:with_fields=)
+
+        perform_enqueued_jobs { job.perform_now }
+
+        expect(job.logger).to have_received(:with_fields=).with(hash_including(activejob_id: job.job_id, request_id: nil))
+      end
+    end
+  end
+end