gitlab-org--gitlab-foss/spec/services/clusters/applications/uninstall_service_spec.rb

# frozen_string_literal: true

require 'spec_helper'

RSpec.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::V3::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::V3::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::V3::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