# encoding: utf-8

require 'spec_helper'

describe Relation::Header, '#rename' do
  subject { object.rename(aliases) }

  let(:object)  { described_class.coerce([[:id, Integer], [:name, String]], keys: keys) }
  let(:aliases) { Algebra::Rename::Aliases.coerce(object, id: :other_id)                }
  let(:keys)    { Relation::Keys.new([described_class.coerce([[:id, Integer]])])        }

  it { should be_instance_of(described_class) }

  it { should_not be(object) }

  its(:to_ary) { should == [[:other_id, Integer], [:name, String]] }

  its(:keys) { should eql(Relation::Keys.new([described_class.coerce([[:other_id, Integer]])])) }
end