1 files changed, 77 insertions, 0 deletions
diff --git a/spec/services/clusters/applications/uninstall_service_spec.rb b/spec/services/clusters/applications/uninstall_service_spec.rb
new file mode 100644
index 00000000000..16497d752b2
--- /dev/null
+++ b/spec/services/clusters/applications/uninstall_service_spec.rb
@@ -0,0 +1,77 @@
+# frozen_string_literal: true
+
+require 'spec_helper'
+
+describe Clusters::Applications::UninstallService, '#execute' do
+  let(:application) { create(:clusters_applications_prometheus, :scheduled) }
+  let(:service) { described_class.new(application) }
+  let(:helm_client) { instance_double(Gitlab::Kubernetes::Helm::Api) }
+  let(:worker_class) { Clusters::Applications::WaitForUninstallAppWorker }
+
+  before do
+    allow(service).to receive(:helm_api).and_return(helm_client)
+  end
+
+  context 'when there are no errors' do
+    before do
+      expect(helm_client).to receive(:uninstall).with(kind_of(Gitlab::Kubernetes::Helm::DeleteCommand))
+      allow(worker_class).to receive(:perform_in).and_return(nil)
+    end
+
+    it 'make the application to be uninstalling' do
+      expect(application.cluster).not_to be_nil
+      service.execute
+
+      expect(application).to be_uninstalling
+    end
+
+    it 'schedule async installation status check' do
+      expect(worker_class).to receive(:perform_in).once
+
+      service.execute
+    end
+  end
+
+  context 'when k8s cluster communication fails' do
+    let(:error) { Kubeclient::HttpError.new(500, 'system failure', nil) }
+
+    before do
+      expect(helm_client).to receive(:uninstall).with(kind_of(Gitlab::Kubernetes::Helm::DeleteCommand)).and_raise(error)
+    end
+
+    include_examples 'logs kubernetes errors' do
+      let(:error_name) { 'Kubeclient::HttpError' }
+      let(:error_message) { 'system failure' }
+      let(:error_code) { 500 }
+    end
+
+    it 'make the application errored' do
+      service.execute
+
+      expect(application).to be_uninstall_errored
+      expect(application.status_reason).to match('Kubernetes error: 500')
+    end
+  end
+
+  context 'a non kubernetes error happens' do
+    let(:application) { create(:clusters_applications_prometheus, :scheduled) }
+    let(:error) { StandardError.new('something bad happened') }
+
+    before do
+      expect(helm_client).to receive(:uninstall).with(kind_of(Gitlab::Kubernetes::Helm::DeleteCommand)).and_raise(error)
+    end
+
+    include_examples 'logs kubernetes errors' do
+      let(:error_name) { 'StandardError' }
+      let(:error_message) { 'something bad happened' }
+      let(:error_code) { nil }
+    end
+
+    it 'make the application errored' do
+      service.execute
+
+      expect(application).to be_uninstall_errored
+      expect(application.status_reason).to eq('Failed to uninstall.')
+    end
+  end
+end