Test the ExpireJobCacheWorker and related changes

These were untested by the cherry picked commit.

app/models/commit_status.rb

@@ -89,7 +89,7 @@ class CommitStatus < ActiveRecord::Base
           else
             PipelineUpdateWorker.perform_async(pipeline.id)
           end
-          ExpireJobCacheWorker.perform_async(pipeline.id, commit_status.id)
+          ExpireJobCacheWorker.perform_async(commit_status.id)
         end
       end
     end

app/workers/expire_job_cache_worker.rb

@@ -2,15 +2,17 @@ class ExpireJobCacheWorker
   include Sidekiq::Worker
   include BuildQueue
 
-  def perform(pipeline_id, job_id)
-    job = CommitStatus.joins(:pipeline, :project).find_by(id: job)
+  def perform(job_id)
+    job = CommitStatus.joins(:pipeline, :project).find_by(id: job_id)
     return unless job
 
     pipeline = job.pipeline
     project = job.project
 
-    store.touch(project_pipeline_path(project, pipeline))
-    store.touch(project_job_path(project, job))
+    Gitlab::EtagCaching::Store.new.tap do |store|
+      store.touch(project_pipeline_path(project, pipeline))
+      store.touch(project_job_path(project, job))
+    end
   end
 
   private
@@ -30,8 +32,4 @@ class ExpireJobCacheWorker
       job.id,
       format: :json)
   end
-
-  def store
-    @store ||= Gitlab::EtagCaching::Store.new
-  end
 end

spec/models/commit_status_spec.rb

@@ -36,6 +36,16 @@ describe CommitStatus, :models do
     it { is_expected.to eq(commit_status.user) }
   end
 
+  describe 'status state machine' do
+    let!(:commit_status) { create(:commit_status, :running, project: project) }
+
+    it 'invalidates the cache after a transition' do
+      expect(ExpireJobCacheWorker).to receive(:perform_async).with(commit_status.id)
+
+      commit_status.success!
+    end
+  end
+
   describe '#started?' do
     subject { commit_status.started? }
 

spec/workers/expire_job_cache_worker_spec.rb

@@ -0,0 +1,31 @@
+require 'spec_helper'
+
+describe ExpireJobCacheWorker do
+  set(:pipeline) { create(:ci_empty_pipeline) }
+  let(:project) { pipeline.project }
+  subject { described_class.new }
+
+  describe '#perform' do
+    context 'with a job in the pipeline' do
+      let(:job) { create(:ci_build, pipeline: pipeline) }
+
+      it 'invalidates Etag caching for the job path' do
+        pipeline_path = "/#{project.full_path}/pipelines/#{pipeline.id}.json"
+        job_path = "/#{project.full_path}/builds/#{job.id}.json"
+
+        expect_any_instance_of(Gitlab::EtagCaching::Store).to receive(:touch).with(pipeline_path)
+        expect_any_instance_of(Gitlab::EtagCaching::Store).to receive(:touch).with(job_path)
+
+        subject.perform(job.id)
+      end
+    end
+
+    context 'when there is no job in the pipeline' do
+      it 'does not change the etag store' do
+        expect(Gitlab::EtagCaching::Store).not_to receive(:new)
+
+        subject.perform(9999)
+      end
+    end
+  end
+end

spec/workers/expire_pipeline_cache_worker_spec.rb

@@ -10,9 +10,11 @@ describe ExpirePipelineCacheWorker do
     it 'invalidates Etag caching for project pipelines path' do
       pipelines_path = "/#{project.full_path}/pipelines.json"
       new_mr_pipelines_path = "/#{project.full_path}/merge_requests/new.json"
+      pipeline_path = "/#{project.full_path}/pipelines/#{pipeline.id}.json"
 
       expect_any_instance_of(Gitlab::EtagCaching::Store).to receive(:touch).with(pipelines_path)
       expect_any_instance_of(Gitlab::EtagCaching::Store).to receive(:touch).with(new_mr_pipelines_path)
+      expect_any_instance_of(Gitlab::EtagCaching::Store).to receive(:touch).with(pipeline_path)
 
       subject.perform(pipeline.id)
     end