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path: root/spec/services/merge_requests/update_service_spec.rb
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require 'spec_helper'

describe MergeRequests::UpdateService, services: true do
  let(:user) { create(:user) }
  let(:user2) { create(:user) }
  let(:user3) { create(:user) }
  let(:merge_request) { create(:merge_request, :simple, title: 'Old title', assignee_id: user3.id) }
  let(:project) { merge_request.project }
  let(:label) { create(:label) }

  before do
    project.team << [user, :master]
    project.team << [user2, :developer]
  end

  describe 'execute' do
    def find_note(starting_with)
      @merge_request.notes.find do |note|
        note && note.note.start_with?(starting_with)
      end
    end

    def update_merge_request(opts)
      @merge_request = MergeRequests::UpdateService.new(project, user, opts).execute(merge_request)
      @merge_request.reload
    end

    context 'valid params' do
      let(:opts) do
        {
          title: 'New title',
          description: 'Also please fix',
          assignee_id: user2.id,
          state_event: 'close',
          label_ids: [label.id],
          target_branch: 'target'
        }
      end

      let(:service) { MergeRequests::UpdateService.new(project, user, opts) }

      before do
        allow(service).to receive(:execute_hooks)

        perform_enqueued_jobs do
          @merge_request = service.execute(merge_request)
          @merge_request.reload
        end
      end

      it { expect(@merge_request).to be_valid }
      it { expect(@merge_request.title).to eq('New title') }
      it { expect(@merge_request.assignee).to eq(user2) }
      it { expect(@merge_request).to be_closed }
      it { expect(@merge_request.labels.count).to eq(1) }
      it { expect(@merge_request.labels.first.title).to eq(label.name) }
      it { expect(@merge_request.target_branch).to eq('target') }

      it 'should execute hooks with update action' do
        expect(service).to have_received(:execute_hooks).
                               with(@merge_request, 'update')
      end

      it 'should send email to user2 about assign of new merge request and email to user3 about merge request unassignment' do
        deliveries = ActionMailer::Base.deliveries
        email = deliveries.last
        recipients = deliveries.last(2).map(&:to).flatten
        expect(recipients).to include(user2.email, user3.email)
        expect(email.subject).to include(merge_request.title)
      end

      it 'should create system note about merge_request reassign' do
        note = find_note('Reassigned to')

        expect(note).not_to be_nil
        expect(note.note).to include "Reassigned to \@#{user2.username}"
      end

      it 'should create system note about merge_request label edit' do
        note = find_note('Added ~')

        expect(note).not_to be_nil
        expect(note.note).to include "Added ~#{label.id} label"
      end

      it 'creates system note about title change' do
        note = find_note('Title changed')

        expect(note).not_to be_nil
        expect(note.note).to eq 'Title changed from **Old title** to **New title**'
      end

      it 'creates system note about branch change' do
        note = find_note('Target')

        expect(note).not_to be_nil
        expect(note.note).to eq 'Target branch changed from `master` to `target`'
      end
    end

    context 'todos' do
      let!(:pending_todo) { create(:todo, :assigned, user: user, project: project, target: merge_request, author: user2) }

      context 'when the title change' do
        before do
          update_merge_request({ title: 'New title' })
        end

        it 'marks pending todos as done' do
          expect(pending_todo.reload).to be_done
        end
      end

      context 'when the description change' do
        before do
          update_merge_request({ description: 'Also please fix' })
        end

        it 'marks pending todos as done' do
          expect(pending_todo.reload).to be_done
        end
      end

      context 'when is reassigned' do
        before do
          update_merge_request({ assignee: user2 })
        end

        it 'marks previous assignee pending todos as done' do
          expect(pending_todo.reload).to be_done
        end

        it 'creates a pending todo for new assignee' do
          attributes = {
            project: project,
            author: user,
            user: user2,
            target_id: merge_request.id,
            target_type: merge_request.class.name,
            action: Todo::ASSIGNED,
            state: :pending
          }

          expect(Todo.where(attributes).count).to eq 1
        end
      end

      context 'when the milestone change' do
        before do
          update_merge_request({ milestone: create(:milestone) })
        end

        it 'marks pending todos as done' do
          expect(pending_todo.reload).to be_done
        end
      end

      context 'when the labels change' do
        before do
          update_merge_request({ label_ids: [label.id] })
        end

        it 'marks pending todos as done' do
          expect(pending_todo.reload).to be_done
        end
      end

      context 'when the target branch change' do
        before do
          update_merge_request({ target_branch: 'target' })
        end

        it 'marks pending todos as done' do
          expect(pending_todo.reload).to be_done
        end
      end
    end

    context "when the merge request is relabeled" do
      it "sends notifications for subscribers of newly added labels" do
        subscriber, non_subscriber = create_list(:user, 2)
        label.toggle_subscription(subscriber)
        2.times { label.toggle_subscription(non_subscriber) }

        opts = { label_ids: [label.id] }

        perform_enqueued_jobs do
          @merge_request = MergeRequests::UpdateService.new(project, user, opts).execute(merge_request)
        end

        @merge_request.reload
        should_email(subscriber)
        should_not_email(non_subscriber)
      end

      it "does send notifications for existing labels" do
        second_label = create(:label)
        merge_request.labels << label
        subscriber, non_subscriber = create_list(:user, 2)
        label.toggle_subscription(subscriber)
        2.times { label.toggle_subscription(non_subscriber) }

        opts = { label_ids: [label.id, second_label.id] }

        perform_enqueued_jobs do
          @merge_request = MergeRequests::UpdateService.new(project, user, opts).execute(merge_request)
        end

        @merge_request.reload
        should_email(subscriber)
        should_not_email(non_subscriber)
      end

      it "does not send notifications for removed labels" do
        second_label = create(:label)
        merge_request.labels << label
        subscriber, non_subscriber = create_list(:user, 2)
        label.toggle_subscription(subscriber)
        2.times { label.toggle_subscription(non_subscriber) }

        opts = { label_ids: [second_label.id] }

        perform_enqueued_jobs do
          @merge_request = MergeRequests::UpdateService.new(project, user, opts).execute(merge_request)
        end

        @merge_request.reload
        should_not_email(subscriber)
        should_not_email(non_subscriber)
      end
    end

    context 'when MergeRequest has tasks' do
      before { update_merge_request({ description: "- [ ] Task 1\n- [ ] Task 2" }) }

      it { expect(@merge_request.tasks?).to eq(true) }

      context 'when tasks are marked as completed' do
        before { update_merge_request({ description: "- [x] Task 1\n- [X] Task 2" }) }

        it 'creates system note about task status change' do
          note1 = find_note('Marked the task **Task 1** as completed')
          note2 = find_note('Marked the task **Task 2** as completed')

          expect(note1).not_to be_nil
          expect(note2).not_to be_nil
        end
      end

      context 'when tasks are marked as incomplete' do
        before do
          update_merge_request({ description: "- [x] Task 1\n- [X] Task 2" })
          update_merge_request({ description: "- [ ] Task 1\n- [ ] Task 2" })
        end

        it 'creates system note about task status change' do
          note1 = find_note('Marked the task **Task 1** as incomplete')
          note2 = find_note('Marked the task **Task 2** as incomplete')

          expect(note1).not_to be_nil
          expect(note2).not_to be_nil
        end
      end
    end
  end
end