require 'rails_helper'

describe Gitlab::Kubernetes::Helm::Pod do
  describe '#generate' do
    let(:app) { create(:clusters_applications_prometheus) }
    let(:command) { app.install_command }
    let(:namespace) { Gitlab::Kubernetes::Helm::NAMESPACE }
    let(:service_account_name) { nil }

    subject { described_class.new(command, namespace, service_account_name: service_account_name) }

    context 'with a command' do
      it 'generates a Kubeclient::Resource' do
        expect(subject.generate).to be_a_kind_of(Kubeclient::Resource)
      end

      it 'generates the appropriate metadata' do
        metadata = subject.generate.metadata
        expect(metadata.name).to eq("install-#{app.name}")
        expect(metadata.namespace).to eq('gitlab-managed-apps')
        expect(metadata.labels['gitlab.org/action']).to eq('install')
        expect(metadata.labels['gitlab.org/application']).to eq(app.name)
      end

      it 'generates a container spec' do
        spec = subject.generate.spec
        expect(spec.containers.count).to eq(1)
      end

      it 'generates the appropriate specifications for the container' do
        container = subject.generate.spec.containers.first
        expect(container.name).to eq('helm')
        expect(container.image).to eq('registry.gitlab.com/gitlab-org/cluster-integration/helm-install-image/releases/2.12.3-kube-1.11.7')
        expect(container.env.count).to eq(3)
        expect(container.env.map(&:name)).to match_array([:HELM_VERSION, :TILLER_NAMESPACE, :COMMAND_SCRIPT])
        expect(container.command).to match_array(["/bin/sh"])
        expect(container.args).to match_array(["-c", "$(COMMAND_SCRIPT)"])
      end

      it 'includes a never restart policy' do
        spec = subject.generate.spec
        expect(spec.restartPolicy).to eq('Never')
      end

      it 'includes volumes for the container' do
        container = subject.generate.spec.containers.first
        expect(container.volumeMounts.first['name']).to eq('configuration-volume')
        expect(container.volumeMounts.first['mountPath']).to eq("/data/helm/#{app.name}/config")
      end

      it 'includes a volume inside the specification' do
        spec = subject.generate.spec
        expect(spec.volumes.first['name']).to eq('configuration-volume')
      end

      it 'mounts configMap specification in the volume' do
        volume = subject.generate.spec.volumes.first
        expect(volume.configMap['name']).to eq("values-content-configuration-#{app.name}")
        expect(volume.configMap['items'].first['key']).to eq(:'values.yaml')
        expect(volume.configMap['items'].first['path']).to eq(:'values.yaml')
      end

      it 'has no serviceAccountName' do
        spec = subject.generate.spec
        expect(spec.serviceAccountName).to be_nil
      end

      context 'with a service_account_name' do
        let(:service_account_name) { 'sa' }

        it 'uses the serviceAccountName provided' do
          spec = subject.generate.spec
          expect(spec.serviceAccountName).to eq(service_account_name)
        end
      end
    end
  end
end