# encoding: utf-8

require 'spec_helper'

describe Algebra::Extension, '#extensions' do
  subject { object.extensions }

  let(:operand)    { Relation.new([[:id, Integer]], [[1], [2]]) }
  let(:extensions) { { test: 1 }                                }
  let(:object)     { described_class.new(operand, extensions)   }

  it_should_behave_like 'an idempotent method'

  it { should == { Attribute::Object.new(:test) => 1 } }
end