require 'spec_helper'

describe DeleteMergedBranchesService do
  subject(:service) { described_class.new(project, project.owner) }

  let(:project) { create(:project, :repository) }

  context '#execute' do
    it 'deletes a branch that was merged' do
      service.execute

      expect(project.repository.branch_names).not_to include('improve/awesome')
    end

    it 'keeps branch that is unmerged' do
      service.execute

      expect(project.repository.branch_names).to include('feature')
    end

    it 'keeps "master"' do
      service.execute

      expect(project.repository.branch_names).to include('master')
    end

    it 'keeps protected branches' do
      create(:protected_branch, project: project, name: 'improve/awesome')

      service.execute

      expect(project.repository.branch_names).to include('improve/awesome')
    end

    context 'user without rights' do
      let(:user) { create(:user) }

      it 'cannot execute' do
        expect { described_class.new(project, user).execute }.to raise_error(Gitlab::Access::AccessDeniedError)
      end
    end

    context 'open merge requests' do
      it 'does not delete branches from open merge requests' do
        fork_link = create(:forked_project_link, forked_from_project: project)
        create(:merge_request, :reopened, source_project: project, target_project: project, source_branch: 'branch-merged', target_branch: 'master')
        create(:merge_request, :opened, source_project: fork_link.forked_to_project, target_project: project, target_branch: 'improve/awesome', source_branch: 'master')

        service.execute

        expect(project.repository.branch_names).to include('branch-merged')
        expect(project.repository.branch_names).to include('improve/awesome')
      end
    end
  end

  context '#async_execute' do
    it 'calls DeleteMergedBranchesWorker async' do
      expect(DeleteMergedBranchesWorker).to receive(:perform_async)

      service.async_execute
    end
  end
end