# encoding: utf-8 require 'spec_helper' describe Optimizer::Relation::Operation::Unary::SortedOperand, '#optimizable?' do subject { object.optimizable? } let(:described_class) { Class.new(Optimizer::Relation::Operation::Unary) } let(:base) { Relation.new([[:id, Integer]], LazyEnumerable.new) } let(:relation) { operand.project([]) } let(:object) { described_class.new(relation) } before do described_class.class_eval { include Optimizer::Relation::Operation::Unary::SortedOperand } end context 'when operand is sorted' do let(:operand) { base.sort_by { |r| r.id } } it { should be(true) } end context 'when operand is not sorted' do let(:operand) { base } it { should be(false) } end end