require 'spec_helper'

describe Immutable::Vector do
  describe '#reverse_each' do
    [2, 31, 32, 33, 1000, 1024, 1025, 2000].each do |size|
      context "on a #{size}-item vector" do
        let(:vector) { V[1..size] }

        context 'with a block (internal iteration)' do
          it 'returns self' do
            vector.reverse_each {}.should be(vector)
          end

          it 'yields all items in the opposite order as #each' do
            result = []
            vector.reverse_each { |item| result << item }
            result.should eql(vector.to_a.reverse)
          end
        end

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