require 'spec_helper'

describe Immutable::SortedSet do
  describe '#at' do
    [
      [[], 10, nil],
      [['A'], 10, nil],
      [%w[A B C], 0, 'A'],
      [%w[A B C], 1, 'B'],
      [%w[A B C], 2, 'C'],
      [%w[A B C], 3, nil],
      [%w[A B C], -1, 'C'],
      [%w[A B C], -2, 'B'],
      [%w[A B C], -3, 'A'],
      [%w[A B C], -4, nil]
    ].each do |values, number, expected|
      describe "#{values.inspect} with #{number}" do
        it "returns #{expected.inspect}" do
          SS[*values].at(number).should == expected
        end
      end
    end
  end
end
