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path: root/spec/services/discussions/resolve_service_spec.rb
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# frozen_string_literal: true

require 'spec_helper'

RSpec.describe Discussions::ResolveService do
  describe '#execute' do
    let_it_be(:project) { create(:project, :repository) }
    let_it_be(:user) { create(:user, developer_projects: [project]) }
    let_it_be(:merge_request) { create(:merge_request, :merge_when_pipeline_succeeds, source_project: project) }
    let(:discussion) { create(:diff_note_on_merge_request, noteable: merge_request, project: project).to_discussion }
    let(:service) { described_class.new(project, user, one_or_more_discussions: discussion) }

    it "doesn't resolve discussions the user can't resolve" do
      expect(discussion).to receive(:can_resolve?).with(user).and_return(false)

      service.execute

      expect(discussion).not_to be_resolved
    end

    it 'resolves the discussion' do
      service.execute

      expect(discussion).to be_resolved
    end

    it 'executes the notification service' do
      expect_next_instance_of(MergeRequests::ResolvedDiscussionNotificationService) do |instance|
        expect(instance).to receive(:execute).with(discussion.noteable)
      end

      service.execute
    end

    it 'schedules an auto-merge' do
      expect(AutoMergeProcessWorker).to receive(:perform_async).with(discussion.noteable.id)

      service.execute
    end

    context 'with a project that requires all discussion to be resolved' do
      before do
        project.update!(only_allow_merge_if_all_discussions_are_resolved: true)
      end

      after do
        project.update!(only_allow_merge_if_all_discussions_are_resolved: false)
      end

      let_it_be(:other_discussion) { create(:diff_note_on_merge_request, noteable: merge_request, project: project).to_discussion }

      it 'does not schedule an auto-merge' do
        expect(AutoMergeProcessWorker).not_to receive(:perform_async)

        service.execute
      end

      it 'schedules an auto-merge' do
        expect(AutoMergeProcessWorker).to receive(:perform_async)

        described_class.new(project, user, one_or_more_discussions: [discussion, other_discussion]).execute
      end
    end

    it 'adds a system note to the discussion' do
      issue = create(:issue, project: project)

      expect(SystemNoteService).to receive(:discussion_continued_in_issue).with(discussion, project, user, issue)
      service = described_class.new(project, user, one_or_more_discussions: discussion, follow_up_issue: issue)
      service.execute
    end

    it 'can resolve multiple discussions at once' do
      other_discussion = create(:diff_note_on_merge_request, noteable: merge_request, project: project).to_discussion
      service = described_class.new(project, user, one_or_more_discussions: [discussion, other_discussion])
      service.execute

      expect([discussion, other_discussion]).to all(be_resolved)
    end

    it 'raises an argument error if discussions do not belong to the same noteable' do
      other_merge_request = create(:merge_request)
      other_discussion = create(:diff_note_on_merge_request,
                                noteable: other_merge_request,
                                project: other_merge_request.source_project).to_discussion
      expect do
        described_class.new(project, user, one_or_more_discussions: [discussion, other_discussion])
      end.to raise_error(
        ArgumentError,
        'Discussions must be all for the same noteable'
      )
    end

    context 'when discussion is not for a merge request' do
      let_it_be(:design) { create(:design, :with_file, issue: create(:issue, project: project)) }
      let(:discussion) { create(:diff_note_on_design, noteable: design, project: project).to_discussion }

      it 'does not execute the notification service' do
        expect(MergeRequests::ResolvedDiscussionNotificationService).not_to receive(:new)

        service.execute
      end

      it 'does not schedule an auto-merge' do
        expect(AutoMergeProcessWorker).not_to receive(:perform_async)

        service.execute
      end
    end
  end
end