1 files changed, 200 insertions, 0 deletions
diff --git a/spec/services/clusters/parse_cluster_applications_artifact_service_spec.rb b/spec/services/clusters/parse_cluster_applications_artifact_service_spec.rb
new file mode 100644
index 00000000000..f14c929554a
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+++ b/spec/services/clusters/parse_cluster_applications_artifact_service_spec.rb
@@ -0,0 +1,200 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Clusters::ParseClusterApplicationsArtifactService do
+  let_it_be(:project) { create(:project) }
+  let_it_be(:user) { create(:user) }
+
+  before do
+    project.add_maintainer(user)
+  end
+
+  describe 'RELEASE_NAMES' do
+    it 'is included in Cluster application names', :aggregate_failures do
+      described_class::RELEASE_NAMES.each do |release_name|
+        expect(Clusters::Cluster::APPLICATIONS).to include(release_name)
+      end
+    end
+  end
+
+  describe '.new' do
+    let(:job) { build(:ci_build) }
+
+    it 'sets the project and current user', :aggregate_failures do
+      service = described_class.new(job, user)
+
+      expect(service.project).to eq(job.project)
+      expect(service.current_user).to eq(user)
+    end
+  end
+
+  describe '#execute' do
+    let_it_be(:cluster, reload: true) { create(:cluster, projects: [project]) }
+    let_it_be(:deployment, reload: true) { create(:deployment, cluster: cluster) }
+
+    let(:job) { deployment.deployable }
+    let(:artifact) { create(:ci_job_artifact, :cluster_applications, job: job) }
+
+    context 'when cluster_applications_artifact feature flag is disabled' do
+      before do
+        stub_feature_flags(cluster_applications_artifact: false)
+      end
+
+      it 'does not call Gitlab::Kubernetes::Helm::Parsers::ListV2 and returns success immediately' do
+        expect(Gitlab::Kubernetes::Helm::Parsers::ListV2).not_to receive(:new)
+
+        result = described_class.new(job, user).execute(artifact)
+
+        expect(result[:status]).to eq(:success)
+      end
+    end
+
+    context 'when cluster_applications_artifact feature flag is enabled for project' do
+      before do
+        stub_feature_flags(cluster_applications_artifact: job.project)
+      end
+
+      it 'calls Gitlab::Kubernetes::Helm::Parsers::ListV2' do
+        expect(Gitlab::Kubernetes::Helm::Parsers::ListV2).to receive(:new).and_call_original
+
+        result = described_class.new(job, user).execute(artifact)
+
+        expect(result[:status]).to eq(:success)
+      end
+
+      context 'artifact is not of cluster_applications type' do
+        let(:artifact) { create(:ci_job_artifact, :archive) }
+        let(:job) { artifact.job }
+
+        it 'raise ArgumentError' do
+          expect do
+            described_class.new(job, user).execute(artifact)
+          end.to raise_error(ArgumentError, 'Artifact is not cluster_applications file type')
+        end
+      end
+
+      context 'artifact exceeds acceptable size' do
+        it 'returns an error' do
+          stub_const("#{described_class}::MAX_ACCEPTABLE_ARTIFACT_SIZE", 1.byte)
+
+          result = described_class.new(job, user).execute(artifact)
+
+          expect(result[:status]).to eq(:error)
+          expect(result[:message]).to eq('Cluster_applications artifact too big. Maximum allowable size: 1 Byte')
+        end
+      end
+
+      context 'job has no deployment cluster' 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 cluster found for this job')
+        end
+      end
+
+      context 'job has deployment cluster' do
+        context 'current user does not have access to deployment cluster' do
+          let(:other_user) { create(:user) }
+
+          it 'returns an error' do
+            result = described_class.new(job, other_user).execute(artifact)
+
+            expect(result[:status]).to eq(:error)
+            expect(result[:message]).to eq('No deployment cluster found for this job')
+          end
+        end
+
+        context 'release is missing' do
+          let(:fixture) { 'spec/fixtures/helm/helm_list_v2_prometheus_missing.json.gz' }
+          let(:file) { fixture_file_upload(Rails.root.join(fixture)) }
+          let(:artifact) { create(:ci_job_artifact, :cluster_applications, job: job, file: file) }
+
+          context 'application does not exist' do
+            it 'does not create or destroy an application' do
+              expect do
+                described_class.new(job, user).execute(artifact)
+              end.not_to change(Clusters::Applications::Prometheus, :count)
+            end
+          end
+
+          context 'application exists' do
+            before do
+              create(:clusters_applications_prometheus, :installed, cluster: cluster)
+            end
+
+            it 'marks the application as uninstalled' do
+              described_class.new(job, user).execute(artifact)
+
+              cluster.application_prometheus.reload
+              expect(cluster.application_prometheus).to be_uninstalled
+            end
+          end
+        end
+
+        context 'release is deployed' do
+          let(:fixture) { 'spec/fixtures/helm/helm_list_v2_prometheus_deployed.json.gz' }
+          let(:file) { fixture_file_upload(Rails.root.join(fixture)) }
+          let(:artifact) { create(:ci_job_artifact, :cluster_applications, job: job, file: file) }
+
+          context 'application does not exist' do
+            it 'creates an application and marks it as installed' do
+              expect do
+                described_class.new(job, user).execute(artifact)
+              end.to change(Clusters::Applications::Prometheus, :count)
+
+              expect(cluster.application_prometheus).to be_persisted
+              expect(cluster.application_prometheus).to be_installed
+            end
+          end
+
+          context 'application exists' do
+            before do
+              create(:clusters_applications_prometheus, :errored, cluster: cluster)
+            end
+
+            it 'marks the application as installed' do
+              described_class.new(job, user).execute(artifact)
+
+              expect(cluster.application_prometheus).to be_installed
+            end
+          end
+        end
+
+        context 'release is failed' do
+          let(:fixture) { 'spec/fixtures/helm/helm_list_v2_prometheus_failed.json.gz' }
+          let(:file) { fixture_file_upload(Rails.root.join(fixture)) }
+          let(:artifact) { create(:ci_job_artifact, :cluster_applications, job: job, file: file) }
+
+          context 'application does not exist' do
+            it 'creates an application and marks it as errored' do
+              expect do
+                described_class.new(job, user).execute(artifact)
+              end.to change(Clusters::Applications::Prometheus, :count)
+
+              expect(cluster.application_prometheus).to be_persisted
+              expect(cluster.application_prometheus).to be_errored
+              expect(cluster.application_prometheus.status_reason).to eq('Helm release failed to install')
+            end
+          end
+
+          context 'application exists' do
+            before do
+              create(:clusters_applications_prometheus, :installed, cluster: cluster)
+            end
+
+            it 'marks the application as errored' do
+              described_class.new(job, user).execute(artifact)
+
+              expect(cluster.application_prometheus).to be_errored
+              expect(cluster.application_prometheus.status_reason).to eq('Helm release failed to install')
+            end
+          end
+        end
+      end
+    end
+  end
+end