require 'spec_helper'

describe Immutable::Hash do
  let(:hash) { H['A' => 'aye', 'B' => 'bee', 'C' => 'see'] }

  describe '#reverse_each' do
    context 'with a block' do
      it 'returns self' do
        hash.reverse_each {}.should be(hash)
      end

      it 'yields all key/value pairs in the opposite order as #each' do
        result = []
        hash.reverse_each { |entry| result << entry }
        result.should eql(hash.to_a.reverse)
      end
    end

    context 'with no block' do
      it 'returns an Enumerator' do
        result = hash.reverse_each
        result.class.should be(Enumerator)
        result.to_a.should eql(hash.to_a.reverse)
      end
    end
  end
end