require 'spec_helper'

describe Ci::ProcessPipelineService, services: true do
  let(:pipeline) { create(:ci_pipeline, ref: 'master') }
  let(:user) { create(:user) }
  let(:config) { nil }

  before do
    allow(pipeline).to receive(:ci_yaml_file).and_return(config)
  end

  describe '#execute' do
    def all_builds
      pipeline.builds
    end

    def builds
      all_builds.where.not(status: [:created, :skipped])
    end

    def create_builds
      described_class.new(pipeline.project, user).execute(pipeline)
    end

    def succeed_pending
      builds.pending.update_all(status: 'success')
    end

    context 'start queuing next builds' do
      before do
        create(:ci_build, :created, pipeline: pipeline, name: 'linux', stage_idx: 0)
        create(:ci_build, :created, pipeline: pipeline, name: 'mac', stage_idx: 0)
        create(:ci_build, :created, pipeline: pipeline, name: 'rspec', stage_idx: 1)
        create(:ci_build, :created, pipeline: pipeline, name: 'rubocop', stage_idx: 1)
        create(:ci_build, :created, pipeline: pipeline, name: 'deploy', stage_idx: 2)
      end

      it 'processes a pipeline' do
        expect(create_builds).to be_truthy
        succeed_pending
        expect(builds.success.count).to eq(2)

        expect(create_builds).to be_truthy
        succeed_pending
        expect(builds.success.count).to eq(4)

        expect(create_builds).to be_truthy
        succeed_pending
        expect(builds.success.count).to eq(5)

        expect(create_builds).to be_falsey
      end

      it 'does not process pipeline if existing stage is running' do
        expect(create_builds).to be_truthy
        expect(builds.pending.count).to eq(2)

        expect(create_builds).to be_falsey
        expect(builds.pending.count).to eq(2)
      end
    end

    context 'custom stage with first job allowed to fail' do
      before do
        create(:ci_build, :created, pipeline: pipeline, name: 'clean_job', stage_idx: 0, allow_failure: true)
        create(:ci_build, :created, pipeline: pipeline, name: 'test_job', stage_idx: 1, allow_failure: true)
      end

      it 'automatically triggers a next stage when build finishes' do
        expect(create_builds).to be_truthy
        expect(builds.pluck(:status)).to contain_exactly('pending')

        pipeline.builds.running_or_pending.each(&:drop)
        expect(builds.pluck(:status)).to contain_exactly('failed', 'pending')
      end
    end

    context 'properly creates builds when "when" is defined' do
      before do
        create(:ci_build, :created, pipeline: pipeline, name: 'build', stage_idx: 0)
        create(:ci_build, :created, pipeline: pipeline, name: 'test', stage_idx: 1)
        create(:ci_build, :created, pipeline: pipeline, name: 'test_failure', stage_idx: 2, when: 'on_failure')
        create(:ci_build, :created, pipeline: pipeline, name: 'deploy', stage_idx: 3)
        create(:ci_build, :created, pipeline: pipeline, name: 'production', stage_idx: 3, when: 'manual')
        create(:ci_build, :created, pipeline: pipeline, name: 'cleanup', stage_idx: 4, when: 'always')
        create(:ci_build, :created, pipeline: pipeline, name: 'clear cache', stage_idx: 4, when: 'manual')
      end

      context 'when builds are successful' do
        it 'properly creates builds' do
          expect(create_builds).to be_truthy
          expect(builds.pluck(:name)).to contain_exactly('build')
          expect(builds.pluck(:status)).to contain_exactly('pending')
          pipeline.builds.running_or_pending.each(&:success)

          expect(builds.pluck(:name)).to contain_exactly('build', 'test')
          expect(builds.pluck(:status)).to contain_exactly('success', 'pending')
          pipeline.builds.running_or_pending.each(&:success)

          expect(builds.pluck(:name)).to contain_exactly('build', 'test', 'deploy')
          expect(builds.pluck(:status)).to contain_exactly('success', 'success', 'pending')
          pipeline.builds.running_or_pending.each(&:success)

          expect(builds.pluck(:name)).to contain_exactly('build', 'test', 'deploy', 'cleanup')
          expect(builds.pluck(:status)).to contain_exactly('success', 'success', 'success', 'pending')
          pipeline.builds.running_or_pending.each(&:success)

          expect(builds.pluck(:status)).to contain_exactly('success', 'success', 'success', 'success')
          pipeline.reload
          expect(pipeline.status).to eq('success')
        end
      end

      context 'when test job fails' do
        it 'properly creates builds' do
          expect(create_builds).to be_truthy
          expect(builds.pluck(:name)).to contain_exactly('build')
          expect(builds.pluck(:status)).to contain_exactly('pending')
          pipeline.builds.running_or_pending.each(&:success)

          expect(builds.pluck(:name)).to contain_exactly('build', 'test')
          expect(builds.pluck(:status)).to contain_exactly('success', 'pending')
          pipeline.builds.running_or_pending.each(&:drop)

          expect(builds.pluck(:name)).to contain_exactly('build', 'test', 'test_failure')
          expect(builds.pluck(:status)).to contain_exactly('success', 'failed', 'pending')
          pipeline.builds.running_or_pending.each(&:success)

          expect(builds.pluck(:name)).to contain_exactly('build', 'test', 'test_failure', 'cleanup')
          expect(builds.pluck(:status)).to contain_exactly('success', 'failed', 'success', 'pending')
          pipeline.builds.running_or_pending.each(&:success)

          expect(builds.pluck(:status)).to contain_exactly('success', 'failed', 'success', 'success')
          pipeline.reload
          expect(pipeline.status).to eq('failed')
        end
      end

      context 'when test and test_failure jobs fail' do
        it 'properly creates builds' do
          expect(create_builds).to be_truthy
          expect(builds.pluck(:name)).to contain_exactly('build')
          expect(builds.pluck(:status)).to contain_exactly('pending')
          pipeline.builds.running_or_pending.each(&:success)

          expect(builds.pluck(:name)).to contain_exactly('build', 'test')
          expect(builds.pluck(:status)).to contain_exactly('success', 'pending')
          pipeline.builds.running_or_pending.each(&:drop)

          expect(builds.pluck(:name)).to contain_exactly('build', 'test', 'test_failure')
          expect(builds.pluck(:status)).to contain_exactly('success', 'failed', 'pending')
          pipeline.builds.running_or_pending.each(&:drop)

          expect(builds.pluck(:name)).to contain_exactly('build', 'test', 'test_failure', 'cleanup')
          expect(builds.pluck(:status)).to contain_exactly('success', 'failed', 'failed', 'pending')
          pipeline.builds.running_or_pending.each(&:success)

          expect(builds.pluck(:name)).to contain_exactly('build', 'test', 'test_failure', 'cleanup')
          expect(builds.pluck(:status)).to contain_exactly('success', 'failed', 'failed', 'success')
          pipeline.reload
          expect(pipeline.status).to eq('failed')
        end
      end

      context 'when deploy job fails' do
        it 'properly creates builds' do
          expect(create_builds).to be_truthy
          expect(builds.pluck(:name)).to contain_exactly('build')
          expect(builds.pluck(:status)).to contain_exactly('pending')
          pipeline.builds.running_or_pending.each(&:success)

          expect(builds.pluck(:name)).to contain_exactly('build', 'test')
          expect(builds.pluck(:status)).to contain_exactly('success', 'pending')
          pipeline.builds.running_or_pending.each(&:success)

          expect(builds.pluck(:name)).to contain_exactly('build', 'test', 'deploy')
          expect(builds.pluck(:status)).to contain_exactly('success', 'success', 'pending')
          pipeline.builds.running_or_pending.each(&:drop)

          expect(builds.pluck(:name)).to contain_exactly('build', 'test', 'deploy', 'cleanup')
          expect(builds.pluck(:status)).to contain_exactly('success', 'success', 'failed', 'pending')
          pipeline.builds.running_or_pending.each(&:success)

          expect(builds.pluck(:status)).to contain_exactly('success', 'success', 'failed', 'success')
          pipeline.reload
          expect(pipeline.status).to eq('failed')
        end
      end

      context 'when build is canceled in the second stage' do
        it 'does not schedule builds after build has been canceled' do
          expect(create_builds).to be_truthy
          expect(builds.pluck(:name)).to contain_exactly('build')
          expect(builds.pluck(:status)).to contain_exactly('pending')
          pipeline.builds.running_or_pending.each(&:success)

          expect(builds.running_or_pending).not_to be_empty

          expect(builds.pluck(:name)).to contain_exactly('build', 'test')
          expect(builds.pluck(:status)).to contain_exactly('success', 'pending')
          pipeline.builds.running_or_pending.each(&:cancel)

          expect(builds.running_or_pending).to be_empty
          expect(pipeline.reload.status).to eq('canceled')
        end
      end

      context 'when listing manual actions' do
        it 'returns only for skipped builds' do
          # currently all builds are created
          expect(create_builds).to be_truthy
          expect(manual_actions).to be_empty

          # succeed stage build
          pipeline.builds.running_or_pending.each(&:success)
          expect(manual_actions).to be_empty

          # succeed stage test
          pipeline.builds.running_or_pending.each(&:success)
          expect(manual_actions).to be_one # production

          # succeed stage deploy
          pipeline.builds.running_or_pending.each(&:success)
          expect(manual_actions).to be_many # production and clear cache
        end

        def manual_actions
          pipeline.manual_actions
        end
      end
    end

    context 'when failed build in the middle stage is retried' do
      context 'when failed build is the only unsuccessful build in the stage' do
        before do
          create(:ci_build, :created, pipeline: pipeline, name: 'build:1', stage_idx: 0)
          create(:ci_build, :created, pipeline: pipeline, name: 'build:2', stage_idx: 0)
          create(:ci_build, :created, pipeline: pipeline, name: 'test:1', stage_idx: 1)
          create(:ci_build, :created, pipeline: pipeline, name: 'test:2', stage_idx: 1)
          create(:ci_build, :created, pipeline: pipeline, name: 'deploy:1', stage_idx: 2)
          create(:ci_build, :created, pipeline: pipeline, name: 'deploy:2', stage_idx: 2)
        end

        it 'does trigger builds in the next stage' do
          expect(create_builds).to be_truthy
          expect(builds.pluck(:name)).to contain_exactly('build:1', 'build:2')

          pipeline.builds.running_or_pending.each(&:success)

          expect(builds.pluck(:name))
            .to contain_exactly('build:1', 'build:2', 'test:1', 'test:2')

          pipeline.builds.find_by(name: 'test:1').success
          pipeline.builds.find_by(name: 'test:2').drop

          expect(builds.pluck(:name))
            .to contain_exactly('build:1', 'build:2', 'test:1', 'test:2')

          Ci::Build.retry(pipeline.builds.find_by(name: 'test:2')).success

          expect(builds.pluck(:name)).to contain_exactly(
            'build:1', 'build:2', 'test:1', 'test:2', 'test:2', 'deploy:1', 'deploy:2')
        end
      end
    end

    context 'creates a builds from .gitlab-ci.yml' do
      let(:config) do
        YAML.dump({
          rspec: {
            stage: 'test',
            script: 'rspec'
          },
          rubocop: {
            stage: 'test',
            script: 'rubocop'
          },
          deploy: {
            stage: 'deploy',
            script: 'deploy'
          }
        })
      end

      # Using stubbed .gitlab-ci.yml created in commit factory
      #

      before do
        stub_ci_pipeline_yaml_file(config)
        create(:ci_build, :created, pipeline: pipeline, name: 'linux', stage: 'build', stage_idx: 0)
        create(:ci_build, :created, pipeline: pipeline, name: 'mac', stage: 'build', stage_idx: 0)
      end

      it 'when processing a pipeline' do
        # Currently we have two builds with state created
        expect(builds.count).to eq(0)
        expect(all_builds.count).to eq(2)

        # Create builds will mark the created as pending
        expect(create_builds).to be_truthy
        expect(builds.count).to eq(2)
        expect(all_builds.count).to eq(2)

        # When we builds succeed we will create a rest of pipeline from .gitlab-ci.yml
        # We will have 2 succeeded, 2 pending (from stage test), total 5 (one more build from deploy)
        succeed_pending
        expect(create_builds).to be_truthy
        expect(builds.success.count).to eq(2)
        expect(builds.pending.count).to eq(2)
        expect(all_builds.count).to eq(5)

        # When we succeed the 2 pending from stage test,
        # We will queue a deploy stage, no new builds will be created
        succeed_pending
        expect(create_builds).to be_truthy
        expect(builds.pending.count).to eq(1)
        expect(builds.success.count).to eq(4)
        expect(all_builds.count).to eq(5)

        # When we succeed last pending build, we will have a total of 5 succeeded builds, no new builds will be created
        succeed_pending
        expect(create_builds).to be_falsey
        expect(builds.success.count).to eq(5)
        expect(all_builds.count).to eq(5)
      end
    end
  end
end