require 'spec_helper' describe 'Veritas::Optimizer::Algebra::Summarization::UnoptimizedOperand#optimizable?' do subject { object.optimizable? } let(:klass) { Optimizer::Algebra::Summarization::UnoptimizedOperand } let(:header) { Relation::Header.new([ [ :id, Integer ] ]) } let(:base) { Relation.new(header, [ [ 1 ] ].each) } let(:summarizers) { [ :text, lambda { |acc, tuple| 1 } ] } let(:relation) { operand.summarize(operand) { |r| r.add(*summarizers) } } let(:object) { klass.new(relation) } before do object.operation.should be_kind_of(Algebra::Summarization) end context 'when the operand is optimizable' do let(:operand) { base.project(header) } it { should be(true) } end context 'when the operand is not optimizable' do let(:operand) { base } it { should be(false) } end end