require 'spec_helper' describe 'Veritas::Optimizer::Algebra::Rename#header' do subject { object.header } let(:klass) { Optimizer::Algebra::Rename } let(:header) { Relation::Header.new([ [ :id, Integer ] ]) } let(:base) { Relation.new(header, [ [ 1 ] ].each) } let(:aliases) { { :id => :other_id } } let(:relation) { base.rename(aliases) } let(:object) { klass.new(relation) } before do object.operation.should be_kind_of(Algebra::Rename) end it { should eql(Relation::Header.new([ [ :other_id, Integer ] ])) } end