spec/models/preloaders/user_max_access_level_in_projects_preloader_spec.rb


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# frozen_string_literal: true

require 'spec_helper'

RSpec.describe Preloaders::UserMaxAccessLevelInProjectsPreloader do
  let_it_be(:user) { create(:user) }
  let_it_be(:project_1) { create(:project) }
  let_it_be(:project_2) { create(:project) }
  let_it_be(:project_3) { create(:project) }
  let_it_be(:project_4) { create(:project) }
  let_it_be(:project_5) { create(:project) }

  let(:projects) { [project_1, project_2, project_3, project_4, project_5] }
  let(:query) { projects.each { |project| user.can?(:read_project, project) } }

  before do
    project_1.add_developer(user)
    project_2.add_developer(user)
  end

  context 'without preloader' do
    it 'runs some queries' do
      # we have an existing N+1, one for each project for which user is not a member
      # in this spec, project_3, project_4, project_5
      # https://gitlab.com/gitlab-org/gitlab/-/issues/362890
      expect { query }.to make_queries(projects.size + 3)
    end
  end

  describe '#execute', :request_store do
    let(:projects_arg) { projects }

    context 'when user is present' do
      before do
        Preloaders::UserMaxAccessLevelInProjectsPreloader.new(projects_arg, user).execute
      end

      it 'avoids N+1 queries' do
        expect { query }.not_to make_queries
      end

      context 'when projects is an array of IDs' do
        let(:projects_arg) { projects.map(&:id) }

        it 'avoids N+1 queries' do
          expect { query }.not_to make_queries
        end
      end

      # Test for handling of SQL table name clashes.
      context 'when projects is a relation including project_authorizations' do
        let(:projects_arg) do
          Project.where(id: ProjectAuthorization.where(project_id: projects).select(:project_id))
        end

        it 'avoids N+1 queries' do
          expect { query }.not_to make_queries
        end
      end
    end

    context 'when user is not present' do
      before do
        Preloaders::UserMaxAccessLevelInProjectsPreloader.new(projects_arg, nil).execute
      end

      it 'does not avoid N+1 queries' do
        expect { query }.to make_queries
      end
    end
  end
end