Adds additional error check for no deployment

Also rejigs code slightly to be more readable / scannable

app/services/clusters/parse_cluster_applications_artifact_service.rb

@@ -18,13 +18,9 @@ module Clusters
 
       raise ArgumentError, 'Artifact is not cluster_applications file type' unless artifact&.cluster_applications?
 
-      unless artifact.file.size < MAX_ACCEPTABLE_ARTIFACT_SIZE
-        return error(too_big_error_message, :bad_request)
-      end
-
-      unless cluster
-        return error(s_('ClusterIntegration|No deployment cluster found for this job'))
-      end
+      return error(too_big_error_message, :bad_request) unless artifact.file.size < MAX_ACCEPTABLE_ARTIFACT_SIZE
+      return error(no_deployment_message, :bad_request) unless job.deployment
+      return error(no_deployment_cluster_message, :bad_request) unless cluster
 
       parse!(artifact)
 
@@ -61,7 +57,8 @@ module Clusters
 
       Clusters::Cluster.transaction do
         RELEASE_NAMES.each do |release_name|
-          application = find_or_build_application(release_name)
+          application_class = Clusters::Cluster::APPLICATIONS[release_name]
+          application = cluster.find_or_build_application(application_class)
 
           release = release_by_name[release_name]
 
@@ -80,16 +77,18 @@ module Clusters
       end
     end
 
-    def find_or_build_application(application_name)
-      application_class = Clusters::Cluster::APPLICATIONS[application_name]
-
-      cluster.find_or_build_application(application_class)
-    end
-
     def too_big_error_message
       human_size = ActiveSupport::NumberHelper.number_to_human_size(MAX_ACCEPTABLE_ARTIFACT_SIZE)
 
       s_('ClusterIntegration|Cluster_applications artifact too big. Maximum allowable size: %{human_size}') % { human_size: human_size }
     end
+
+    def no_deployment_message
+      s_('ClusterIntegration|No deployment found for this job')
+    end
+
+    def no_deployment_cluster_message
+      s_('ClusterIntegration|No deployment cluster found for this job')
+    end
   end
 end

locale/gitlab.pot

@@ -4974,6 +4974,9 @@ msgstr ""
 msgid "ClusterIntegration|No deployment cluster found for this job"
 msgstr ""
 
+msgid "ClusterIntegration|No deployment found for this job"
+msgstr ""
+
 msgid "ClusterIntegration|No instance type found"
 msgstr ""
 

spec/services/clusters/parse_cluster_applications_artifact_service_spec.rb

@@ -85,9 +85,21 @@ describe Clusters::ParseClusterApplicationsArtifactService do
         end
       end
 
-      context 'job has no deployment cluster' do
+      context 'job has no deployment' do
         let(:job) { build(:ci_build) }
 
+        it 'returns an error' do
+          result = described_class.new(job, user).execute(artifact)
+
+          expect(result[:status]).to eq(:error)
+          expect(result[:message]).to eq('No deployment found for this job')
+        end
+      end
+
+      context 'job has no deployment cluster' do
+        let(:deployment) { create(:deployment) }
+        let(:job) { deployment.deployable }
+
         it 'returns an error' do
           result = described_class.new(job, user).execute(artifact)