# encoding: utf-8 require 'spec_helper' describe Optimizer::Algebra::Rename::OrderOperand, '#optimizable?' do subject { object.optimizable? } let(:base) { Relation.new([[:id, Integer]], LazyEnumerable.new([[1]])) } let(:aliases) { { id: :other_id } } let(:relation) { operand.rename(aliases) } let(:object) { described_class.new(relation) } before do expect(object.operation).to be_kind_of(Algebra::Rename) end context 'when the operand is an order operation' do let(:operand) { base.sort_by { |r| r.id } } it { should be(true) } end context 'when the operand is not an order operation' do let(:operand) { base } it { should be(false) } end end