1 files changed, 93 insertions, 0 deletions
diff --git a/spec/services/metrics/dashboard/annotations/delete_service_spec.rb b/spec/services/metrics/dashboard/annotations/delete_service_spec.rb
new file mode 100644
index 00000000000..95825db6902
--- /dev/null
+++ b/spec/services/metrics/dashboard/annotations/delete_service_spec.rb
@@ -0,0 +1,93 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Metrics::Dashboard::Annotations::DeleteService do
+  let(:user) { create(:user) }
+  let(:service_instance) { described_class.new(user, annotation) }
+
+  shared_examples 'executed annotation deletion' do
+    it 'returns success response', :aggregate_failures do
+      expect(annotation).to receive(:destroy).and_return(true)
+
+      response = service_instance.execute
+
+      expect(response[:status]).to be :success
+    end
+  end
+
+  shared_examples 'prevented annotation deletion' do |message|
+    it 'returns error response', :aggregate_failures do
+      response = service_instance.execute
+
+      expect(response[:status]).to be :error
+      expect(response[:message]).to eql message
+    end
+
+    it 'does not change db state' do
+      expect(annotation).not_to receive(:destroy)
+
+      service_instance.execute
+    end
+  end
+
+  describe '.execute' do
+    context 'with specific environment' do
+      let(:annotation) { create(:metrics_dashboard_annotation, environment: environment) }
+      let(:environment) { create(:environment) }
+
+      context 'with anonymous user' do
+        it_behaves_like 'prevented annotation deletion', 'You are not authorized to delete this annotation'
+      end
+
+      context 'with maintainer user' do
+        before do
+          environment.project.add_maintainer(user)
+        end
+
+        it_behaves_like 'executed annotation deletion'
+
+        context 'annotation failed to delete' do
+          it 'returns error response', :aggregate_failures do
+            allow(annotation).to receive(:destroy).and_return(false)
+
+            response = service_instance.execute
+
+            expect(response[:status]).to be :error
+            expect(response[:message]).to eql 'Annotation has not been deleted'
+          end
+        end
+      end
+    end
+
+    context 'with specific cluster' do
+      let(:annotation) { create(:metrics_dashboard_annotation, cluster: cluster, environment: nil) }
+
+      context 'with anonymous user' do
+        let(:cluster) { create(:cluster, :project) }
+
+        it_behaves_like 'prevented annotation deletion', 'You are not authorized to delete this annotation'
+      end
+
+      context 'with maintainer user' do
+        let(:cluster) { create(:cluster, :project) }
+
+        before do
+          cluster.project.add_maintainer(user)
+        end
+
+        it_behaves_like 'executed annotation deletion'
+      end
+
+      context 'with owner user' do
+        let(:cluster) { create(:cluster, :group) }
+
+        before do
+          cluster.group.add_owner(user)
+        end
+
+        it_behaves_like 'executed annotation deletion'
+      end
+    end
+  end
+end