Add upstream/downstream pipeline specs

ee/app/serializers/dashboard_operations_project_entity.rb

@@ -46,6 +46,10 @@ class DashboardOperationsProjectEntity < Grape::Entity
     )
   end
 
+  def last_pipeline
+    dashboard_project.project.commit&.last_pipeline
+  end
+
   def upstream_pipeline
     last_pipeline&.source_pipeline&.source_pipeline
   end
@@ -54,10 +58,6 @@ class DashboardOperationsProjectEntity < Grape::Entity
     last_pipeline&.sourced_pipelines&.map(&:source_pipeline)
   end
 
-  def last_pipeline
-    dashboard_project.project.commit&.last_pipeline
-  end
-
   def last_deployment?
     dashboard_project.last_deployment
   end

ee/spec/serializers/dashboard_operations_project_entity_spec.rb

@@ -14,4 +14,70 @@ describe DashboardOperationsProjectEntity do
     expect(subject).to include(:remove_path, :alert_count)
     expect(subject.first).to include(:id)
   end
+
+  it 'does not have optional fields' do
+    expect(subject).not_to include(:last_pipeline, :upstream_pipeline, :downstream_pipelines)
+  end
+
+  context 'when there is a pipeline' do
+    let!(:pipeline) { create(:ci_pipeline, project: project, sha: project.commit.sha) }
+
+    it 'has the last pipeline field' do
+      expect(subject).to include(:last_pipeline)
+    end
+
+    context 'when there is an upstream status' do
+      let(:bridge) { create(:ci_bridge, status: :pending) }
+
+      before do
+        create(:ci_sources_pipeline, pipeline: pipeline, source_job: bridge)
+      end
+
+      it 'has the upstream pipeline field' do
+        expect(subject).to include(:upstream_pipeline)
+      end
+    end
+
+    context 'when there is a downstream status' do
+      let(:build) { create(:ci_build, pipeline: pipeline) }
+
+      before do
+        create(:ci_sources_pipeline, source_job: build)
+      end
+
+      it 'has the downstream pipeline field' do
+        expect(subject).to include(:downstream_pipelines)
+      end
+
+      context 'when there are multiple downstream statuses' do
+        before do
+          create_list(:ci_sources_pipeline, 5, source_job: build)
+        end
+
+        it 'has the downstream pipeline field' do
+          expect(subject).to include(:downstream_pipelines)
+          expect(subject[:downstream_pipelines].count).to eq(6)
+        end
+      end
+    end
+
+    context 'when there are both an upstream and downstream pipelines' do
+      let(:build) { create(:ci_build, pipeline: pipeline) }
+      let(:bridge) { create(:ci_bridge, status: :pending) }
+
+      before do
+        create(:ci_sources_pipeline, pipeline: pipeline, source_job: bridge)
+        create_list(:ci_sources_pipeline, 5, source_job: build)
+      end
+
+      it 'has the upstream pipeline field' do
+        expect(subject).to include(:upstream_pipeline)
+      end
+
+      it 'has the downstream pipeline field' do
+        expect(subject).to include(:downstream_pipelines)
+        expect(subject[:downstream_pipelines].count).to eq(5)
+      end
+    end
+  end
 end