require 'spec_helper'

describe Ci::CreatePipelineService do
  include ProjectForksHelper

  set(:project) { create(:project, :repository) }
  let(:user) { create(:admin) }
  let(:ref_name) { 'refs/heads/master' }

  before do
    stub_repository_ci_yaml_file(sha: anything)
  end

  describe '#execute' do
    def execute_service(
      source: :push,
      after: project.commit.id,
      message: 'Message',
      ref: ref_name,
      trigger_request: nil)
      params = { ref: ref,
                 before: '00000000',
                 after: after,
                 commits: [{ message: message }] }

      described_class.new(project, user, params).execute(
        source, trigger_request: trigger_request)
    end

    context 'valid params' do
      let(:pipeline) { execute_service }

      let(:pipeline_on_previous_commit) do
        execute_service(
          after: previous_commit_sha_from_ref('master')
        )
      end

      it 'creates a pipeline' do
        expect(pipeline).to be_kind_of(Ci::Pipeline)
        expect(pipeline).to be_valid
        expect(pipeline).to be_persisted
        expect(pipeline).to be_push
        expect(pipeline).to eq(project.pipelines.last)
        expect(pipeline).to have_attributes(user: user)
        expect(pipeline).to have_attributes(status: 'pending')
        expect(pipeline.repository_source?).to be true
        expect(pipeline.builds.first).to be_kind_of(Ci::Build)
      end

      it 'increments the prometheus counter' do
        expect(Gitlab::Metrics).to receive(:counter)
          .with(:pipelines_created_total, "Counter of pipelines created")
          .and_call_original

        pipeline
      end

      context 'when merge requests already exist for this source branch' do
        let(:merge_request_1) do
          create(:merge_request, source_branch: 'master', target_branch: "branch_1", source_project: project)
        end
        let(:merge_request_2) do
          create(:merge_request, source_branch: 'master', target_branch: "branch_2", source_project: project)
        end

        context 'when the head pipeline sha equals merge request sha' do
          it 'updates head pipeline of each merge request' do
            merge_request_1
            merge_request_2

            head_pipeline = execute_service

            expect(merge_request_1.reload.head_pipeline).to eq(head_pipeline)
            expect(merge_request_2.reload.head_pipeline).to eq(head_pipeline)
          end
        end

        context 'when the head pipeline sha does not equal merge request sha' do
          it 'raises the ArgumentError error from worker and does not update the head piepeline of MRs' do
            merge_request_1
            merge_request_2

            allow_any_instance_of(Ci::Pipeline).to receive(:latest?).and_return(true)

            expect { execute_service(after: 'ae73cb07c9eeaf35924a10f713b364d32b2dd34f') }.to raise_error(ArgumentError)

            last_pipeline = Ci::Pipeline.last

            expect(merge_request_1.reload.head_pipeline).not_to eq(last_pipeline)
            expect(merge_request_2.reload.head_pipeline).not_to eq(last_pipeline)
          end
        end

        context 'when there is no pipeline for source branch' do
          it "does not update merge request head pipeline" do
            merge_request = create(:merge_request, source_branch: 'feature',
                                                   target_branch: "branch_1",
                                                   source_project: project)

            head_pipeline = execute_service

            expect(merge_request.reload.head_pipeline).not_to eq(head_pipeline)
          end
        end

        context 'when merge request target project is different from source project' do
          let!(:project) { fork_project(target_project, nil, repository: true) }
          let!(:target_project) { create(:project, :repository) }

          it 'updates head pipeline for merge request' do
            merge_request = create(:merge_request, source_branch: 'master',
                                                   target_branch: "branch_1",
                                                   source_project: project,
                                                   target_project: target_project)

            head_pipeline = execute_service

            expect(merge_request.reload.head_pipeline).to eq(head_pipeline)
          end
        end

        context 'when the pipeline is not the latest for the branch' do
          it 'does not update merge request head pipeline' do
            merge_request = create(:merge_request, source_branch: 'master',
                                                   target_branch: "branch_1",
                                                   source_project: project)

            allow_any_instance_of(Ci::Pipeline).to receive(:latest?).and_return(false)

            execute_service

            expect(merge_request.reload.head_pipeline).to be_nil
          end
        end

        context 'when pipeline has errors' do
          before do
            stub_ci_pipeline_yaml_file('some invalid syntax')
          end

          it 'updates merge request head pipeline reference' do
            merge_request = create(:merge_request, source_branch: 'master',
                                                   target_branch: 'feature',
                                                   source_project: project)

            head_pipeline = execute_service

            expect(head_pipeline).to be_persisted
            expect(head_pipeline.yaml_errors).to be_present
            expect(merge_request.reload.head_pipeline).to eq head_pipeline
          end
        end

        context 'when pipeline has been skipped' do
          before do
            allow_any_instance_of(Ci::Pipeline)
              .to receive(:git_commit_message)
              .and_return('some commit [ci skip]')
          end

          it 'updates merge request head pipeline' do
            merge_request = create(:merge_request, source_branch: 'master',
                                                   target_branch: 'feature',
                                                   source_project: project)

            head_pipeline = execute_service

            expect(head_pipeline).to be_skipped
            expect(head_pipeline).to be_persisted
            expect(merge_request.reload.head_pipeline).to eq head_pipeline
          end
        end
      end

      context 'auto-cancel enabled' do
        before do
          project.update(auto_cancel_pending_pipelines: 'enabled')
        end

        it 'does not cancel HEAD pipeline' do
          pipeline
          pipeline_on_previous_commit

          expect(pipeline.reload).to have_attributes(status: 'pending', auto_canceled_by_id: nil)
        end

        it 'auto cancel pending non-HEAD pipelines' do
          pipeline_on_previous_commit
          pipeline

          expect(pipeline_on_previous_commit.reload).to have_attributes(status: 'canceled', auto_canceled_by_id: pipeline.id)
        end

        it 'does not cancel running outdated pipelines' do
          pipeline_on_previous_commit.run
          execute_service

          expect(pipeline_on_previous_commit.reload).to have_attributes(status: 'running', auto_canceled_by_id: nil)
        end

        it 'cancel created outdated pipelines' do
          pipeline_on_previous_commit.update(status: 'created')
          pipeline

          expect(pipeline_on_previous_commit.reload).to have_attributes(status: 'canceled', auto_canceled_by_id: pipeline.id)
        end

        it 'does not cancel pipelines from the other branches' do
          pending_pipeline = execute_service(
            ref: 'refs/heads/feature',
            after: previous_commit_sha_from_ref('feature')
          )
          pipeline

          expect(pending_pipeline.reload).to have_attributes(status: 'pending', auto_canceled_by_id: nil)
        end
      end

      context 'auto-cancel disabled' do
        before do
          project.update(auto_cancel_pending_pipelines: 'disabled')
        end

        it 'does not auto cancel pending non-HEAD pipelines' do
          pipeline_on_previous_commit
          pipeline

          expect(pipeline_on_previous_commit.reload)
            .to have_attributes(status: 'pending', auto_canceled_by_id: nil)
        end
      end

      def previous_commit_sha_from_ref(ref)
        project.commit(ref).parent.sha
      end
    end

    context "skip tag if there is no build for it" do
      it "creates commit if there is appropriate job" do
        expect(execute_service).to be_persisted
      end

      it "creates commit if there is no appropriate job but deploy job has right ref setting" do
        config = YAML.dump({ deploy: { script: "ls", only: ["master"] } })
        stub_ci_pipeline_yaml_file(config)

        expect(execute_service).to be_persisted
      end
    end

    it 'skips creating pipeline for refs without .gitlab-ci.yml' do
      stub_ci_pipeline_yaml_file(nil)

      expect(execute_service).not_to be_persisted
      expect(Ci::Pipeline.count).to eq(0)
    end

    shared_examples 'a failed pipeline' do
      it 'creates failed pipeline' do
        stub_ci_pipeline_yaml_file(ci_yaml)

        pipeline = execute_service(message: message)

        expect(pipeline).to be_persisted
        expect(pipeline.builds.any?).to be false
        expect(pipeline.status).to eq('failed')
        expect(pipeline.yaml_errors).not_to be_nil
      end
    end

    context 'when yaml is invalid' do
      let(:ci_yaml) { 'invalid: file: fiile' }
      let(:message) { 'Message' }

      it_behaves_like 'a failed pipeline'

      context 'when receive git commit' do
        before do
          allow_any_instance_of(Ci::Pipeline).to receive(:git_commit_message) { message }
        end

        it_behaves_like 'a failed pipeline'
      end
    end

    context 'when commit contains a [ci skip] directive' do
      let(:message) { "some message[ci skip]" }

      ci_messages = [
        "some message[ci skip]",
        "some message[skip ci]",
        "some message[CI SKIP]",
        "some message[SKIP CI]",
        "some message[ci_skip]",
        "some message[skip_ci]",
        "some message[ci-skip]",
        "some message[skip-ci]"
      ]

      before do
        allow_any_instance_of(Ci::Pipeline).to receive(:git_commit_message) { message }
      end

      ci_messages.each do |ci_message|
        it "skips builds creation if the commit message is #{ci_message}" do
          pipeline = execute_service(message: ci_message)

          expect(pipeline).to be_persisted
          expect(pipeline.builds.any?).to be false
          expect(pipeline.status).to eq("skipped")
        end
      end

      shared_examples 'creating a pipeline' do
        it 'does not skip pipeline creation' do
          allow_any_instance_of(Ci::Pipeline).to receive(:git_commit_message) { commit_message }

          pipeline = execute_service(message: commit_message)

          expect(pipeline).to be_persisted
          expect(pipeline.builds.first.name).to eq("rspec")
        end
      end

      context 'when commit message does not contain [ci skip] nor [skip ci]' do
        let(:commit_message) { 'some message' }

        it_behaves_like 'creating a pipeline'
      end

      context 'when commit message is nil' do
        let(:commit_message) { nil }

        it_behaves_like 'creating a pipeline'
      end

      context 'when there is [ci skip] tag in commit message and yaml is invalid' do
        let(:ci_yaml) { 'invalid: file: fiile' }

        it_behaves_like 'a failed pipeline'
      end
    end

    context 'when there are no jobs for this pipeline' do
      before do
        config = YAML.dump({ test: { script: 'ls', only: ['feature'] } })
        stub_ci_pipeline_yaml_file(config)
      end

      it 'does not create a new pipeline' do
        result = execute_service

        expect(result).not_to be_persisted
        expect(Ci::Build.all).to be_empty
        expect(Ci::Pipeline.count).to eq(0)
      end
    end

    context 'with manual actions' do
      before do
        config = YAML.dump({ deploy: { script: 'ls', when: 'manual' } })
        stub_ci_pipeline_yaml_file(config)
      end

      it 'does not create a new pipeline' do
        result = execute_service

        expect(result).to be_persisted
        expect(result.manual_actions).not_to be_empty
      end
    end

    context 'with environment' do
      before do
        config = YAML.dump(deploy: { environment: { name: "review/$CI_COMMIT_REF_NAME" }, script: 'ls' })
        stub_ci_pipeline_yaml_file(config)
      end

      it 'creates the environment' do
        result = execute_service

        expect(result).to be_persisted
        expect(Environment.find_by(name: "review/master")).not_to be_nil
      end
    end

    context 'when environment with invalid name' do
      before do
        config = YAML.dump(deploy: { environment: { name: 'name,with,commas' }, script: 'ls' })
        stub_ci_pipeline_yaml_file(config)
      end

      it 'does not create an environment' do
        expect do
          result = execute_service

          expect(result).to be_persisted
        end.not_to change { Environment.count }
      end
    end

    context 'when builds with auto-retries are configured' do
      before do
        config = YAML.dump(rspec: { script: 'rspec', retry: 2 })
        stub_ci_pipeline_yaml_file(config)
      end

      it 'correctly creates builds with auto-retry value configured' do
        pipeline = execute_service

        expect(pipeline).to be_persisted
        expect(pipeline.builds.find_by(name: 'rspec').retries_max).to eq 2
      end
    end

    shared_examples 'when ref is protected' do
      let(:user) { create(:user) }

      context 'when user is developer' do
        before do
          project.add_developer(user)
        end

        it 'does not create a pipeline' do
          expect(execute_service).not_to be_persisted
          expect(Ci::Pipeline.count).to eq(0)
        end
      end

      context 'when user is master' do
        let(:pipeline) { execute_service }

        before do
          project.add_master(user)
        end

        it 'creates a protected pipeline' do
          expect(pipeline).to be_persisted
          expect(pipeline).to be_protected
          expect(Ci::Pipeline.count).to eq(1)
        end
      end

      context 'when trigger belongs to no one' do
        let(:user) {}
        let(:trigger_request) { create(:ci_trigger_request) }

        it 'does not create a pipeline' do
          expect(execute_service(trigger_request: trigger_request))
            .not_to be_persisted
          expect(Ci::Pipeline.count).to eq(0)
        end
      end

      context 'when trigger belongs to a developer' do
        let(:user) { create(:user) }
        let(:trigger) { create(:ci_trigger, owner: user) }
        let(:trigger_request) { create(:ci_trigger_request, trigger: trigger) }

        before do
          project.add_developer(user)
        end

        it 'does not create a pipeline' do
          expect(execute_service(trigger_request: trigger_request))
            .not_to be_persisted
          expect(Ci::Pipeline.count).to eq(0)
        end
      end

      context 'when trigger belongs to a master' do
        let(:user) { create(:user) }
        let(:trigger) { create(:ci_trigger, owner: user) }
        let(:trigger_request) { create(:ci_trigger_request, trigger: trigger) }

        before do
          project.add_master(user)
        end

        it 'creates a pipeline' do
          expect(execute_service(trigger_request: trigger_request))
            .to be_persisted
          expect(Ci::Pipeline.count).to eq(1)
        end
      end
    end

    context 'when ref is a protected branch' do
      before do
        create(:protected_branch, project: project, name: 'master')
      end

      it_behaves_like 'when ref is protected'
    end

    context 'when ref is a protected tag' do
      let(:ref_name) { 'refs/tags/v1.0.0' }

      before do
        create(:protected_tag, project: project, name: '*')
      end

      it_behaves_like 'when ref is protected'
    end

    context 'when ref is not protected' do
      context 'when trigger belongs to no one' do
        let(:user) {}
        let(:trigger) { create(:ci_trigger, owner: nil) }
        let(:trigger_request) { create(:ci_trigger_request, trigger: trigger) }
        let(:pipeline) { execute_service(trigger_request: trigger_request) }

        it 'creates an unprotected pipeline' do
          expect(pipeline).to be_persisted
          expect(pipeline).not_to be_protected
          expect(Ci::Pipeline.count).to eq(1)
        end
      end
    end
  end
end