# encoding: utf-8 require 'spec_helper' describe Algebra::Summarization, '#hash' do subject { object.hash } let(:operand) { Relation.new([[:id, Integer]], [[1], [2]]) } let(:summarize_by) { operand.project([]) } let(:summarizers) { { count: ->(acc, tuple) { acc.to_i + 1 } } } let(:object) { described_class.new(operand, summarize_by, summarizers) } it_should_behave_like 'a hash method' it { should == described_class.hash ^ operand.hash ^ summarize_by.hash ^ summarizers.hash } end