fluke/devops-service/spec/workers/stack_bootstrap_worker_spec.rb

require 'workers/stack_bootstrap_worker'

RSpec.describe StackBootstrapWorker, type: :worker, stubbed_connector: true do
  let(:stack_attrs) { attributes_for(:stack_ec2).stringify_keys }
  let(:perform_with_bootstrap) { worker.perform('stack_attributes' => stack_attrs) }
  let(:perform_without_bootstrap) { worker.perform('stack_attributes' => stack_attrs.merge('without_bootstrap' => true)) }
  let(:stack_synchronizer) { instance_double(StackSynchronizer, sync: 0) }
  let(:stack_servers_bootstrapper) { instance_double(StackServersBootstrapper, bootstrap: true) }
  let(:stack_servers_persister) { instance_double(StackServersPersister, persist: {1 => build_list(:server, 2)}) }
  let(:worker) { described_class.new }

  before do
    allow(Provider::ProviderFactory).to receive(:providers).and_return(%w(ec2))

    allow(worker).to receive(:update_report)
    allow(worker).to receive(:stack_synchronizer) { stack_synchronizer }
    allow(worker).to receive(:stack_servers_bootstrapper) { stack_servers_bootstrapper }
    allow(worker).to receive(:stack_servers_persister) { stack_servers_persister }

    allow(stubbed_connector).to receive(:stack_insert)
    allow(Devops::Model::StackEc2).to receive(:create) { Devops::Model::StackEc2.new(stack_attrs) }
  end


  it 'requires "stack_attributes" in options' do
    expect{ worker.perform({}) }.to raise_error KeyError
  end

  it 'updates report about operation' do
    expect(worker).to receive(:update_report)
    perform_without_bootstrap
  end

  it 'updates report about operation, creates stack and persists stack servers' do
    allow(worker).to receive(:create_stack).and_call_original
    expect(worker).to receive(:update_report).ordered
    expect(worker).to receive(:create_stack).ordered
    expect(stack_servers_persister).to receive(:persist).ordered
    perform_without_bootstrap
  end

  context 'if without_bootstrap is true' do
    it "doesn't bootstrap servers" do
      expect(stack_servers_bootstrapper).not_to receive(:bootstrap)
      perform_without_bootstrap
    end

    it 'returns 0' do
      expect(perform_without_bootstrap).to eq 0
    end
  end

  context 'if without_bootstrap is false or not set' do
    it 'bootstraps servers in order by priorities, separately' do
      first_servers = build_list(:server, 2)
      last_servers = build_list(:server, 3)
      allow(stack_servers_persister).to receive(:persist) {
        {3 => first_servers, 1 => last_servers}
      }
      expect(stack_servers_bootstrapper).to receive(:bootstrap).with(first_servers).ordered
      expect(stack_servers_bootstrapper).to receive(:bootstrap).with(last_servers).ordered
      perform_with_bootstrap
    end

    context 'when bootstraping servers was successful' do
      it 'returns 0' do
        expect(perform_with_bootstrap).to eq 0
      end
    end

    context 'when a known error occured during servers bootstrap' do
      before do
        allow(stack_servers_bootstrapper).to receive(:bootstrap) { raise StackServerBootstrapError }
      end

      it 'rollbacks stack and returns 2' do
        expect_any_instance_of(Devops::Model::StackEc2).to receive(:delete_stack_in_cloud!)
        expect(stubbed_connector).to receive(:stack_servers_delete)
        expect(stubbed_connector).to receive(:stack_delete)
        perform_with_bootstrap
      end

      it 'returns 2' do
        allow(worker).to receive(:rollback_stack!)
        expect(perform_with_bootstrap).to eq 2
      end
    end

    context 'when a known error occured during servers deploy' do
      it "doesn't rollback stack and returns 3" do
        allow(stack_servers_bootstrapper).to receive(:bootstrap) { raise StackServerDeployError }
        expect(worker).not_to receive(:rollback_stack!)
        expect(perform_with_bootstrap).to eq 3
      end
    end

    context "when a servers bootstrap & deploy haven't been finished due to timeout" do
      it "doesn't rollback stack and returns 3" do
        allow(stack_servers_bootstrapper).to receive(:bootstrap) { raise StackServerBootstrapDeployTimeout }
        expect(worker).not_to receive(:rollback_stack!)
        expect(perform_with_bootstrap).to eq 4
      end
    end

    context 'when an unknown error occured during servers bootsrap and deploy' do
      it 'rollbacks stack and reraises that error' do
        error = StandardError.new
        allow(stack_servers_bootstrapper).to receive(:bootstrap) { raise error }
        allow(worker).to receive(:rollback_stack!)
        expect(worker).to receive(:rollback_stack!)
        expect{perform_with_bootstrap}.to raise_error(error)
      end
    end
  end

  context "when stack creation wasn't successful" do
    it 'returns 1' do
      allow(stack_synchronizer).to receive(:sync) { 5 }
      allow(stack_synchronizer).to receive(:reason_from_error_code) { :error }
      expect(perform_without_bootstrap).to eq 1
    end
  end
end