# encoding: utf-8

require 'spec_helper'

describe Algebra::Rename::Aliases, '#to_hash' do
  subject { object.to_hash }

  let(:attribute) { Attribute::Integer.new(:id)  }
  let(:object)    { described_class.new(aliases) }

  context 'when aliases is frozen' do
    let(:aliases) { { attribute => attribute.rename(:other_id) }.freeze }

    it_should_behave_like 'an idempotent method'

    it { should equal(aliases) }
  end

  context 'when aliases is not frozen' do
    let(:aliases) { { attribute => attribute.rename(:other_id) } }

    it_should_behave_like 'an idempotent method'

    it { should_not equal(aliases) }

    it { should be_instance_of(Hash) }

    it { should == aliases }

    it { should be_frozen }
  end
end