Fix bug that unlocked artifacts for the wrong CI ref

When looking for a CI ref for a given ref_path we were not
scoping the search for a given project, causing refs from
other projects to have artifacts being unlocked.

app/workers/ci/ref_delete_unlock_artifacts_worker.rb

@@ -10,7 +10,7 @@ module Ci
     def perform(project_id, user_id, ref_path)
       ::Project.find_by_id(project_id).try do |project|
         ::User.find_by_id(user_id).try do |user|
-          ::Ci::Ref.find_by_ref_path(ref_path).try do |ci_ref|
+          project.ci_refs.find_by_ref_path(ref_path).try do |ci_ref|
             ::Ci::UnlockArtifactsService
               .new(project, user)
               .execute(ci_ref)

spec/workers/ci/ref_delete_unlock_artifacts_worker_spec.rb

@@ -29,10 +29,8 @@ RSpec.describe Ci::RefDeleteUnlockArtifactsWorker do
       context 'when user exists' do
         let(:user_id) { project.creator.id }
 
-        context 'when ci ref exists' do
-          before do
-            create(:ci_ref, ref_path: ref)
-          end
+        context 'when ci ref exists for project' do
+          let!(:ci_ref) { create(:ci_ref, ref_path: ref, project: project) }
 
           it 'calls the service' do
             service = spy(Ci::UnlockArtifactsService)
@@ -40,17 +38,33 @@ RSpec.describe Ci::RefDeleteUnlockArtifactsWorker do
 
             perform
 
-            expect(service).to have_received(:execute)
+            expect(service).to have_received(:execute).with(ci_ref)
           end
         end
 
-        context 'when ci ref does not exist' do
+        context 'when ci ref does not exist for the given project' do
+          let!(:another_ci_ref) { create(:ci_ref, ref_path: ref) }
+
           it 'does not call the service' do
             expect(Ci::UnlockArtifactsService).not_to receive(:new)
 
             perform
           end
         end
+
+        context 'when same ref path exists for a different project' do
+          let!(:another_ci_ref) { create(:ci_ref, ref_path: ref) }
+          let!(:ci_ref) { create(:ci_ref, ref_path: ref, project: project) }
+
+          it 'calls the service with the correct ref_id' do
+            service = spy(Ci::UnlockArtifactsService)
+            expect(Ci::UnlockArtifactsService).to receive(:new).and_return(service)
+
+            perform
+
+            expect(service).to have_received(:execute).with(ci_ref)
+          end
+        end
       end
 
       context 'when user does not exist' do