Copyright Rails Helper

# Pretty formatting of the copyright for the footer of your pages
module CopyrightHelper
  def copyright(year, now=Time.now)
    if now.year == year
      year.to_s
    elsif year / 1000 == now.year / 1000 # same century
      year.to_s + "–" + now.year.to_s[-2..3]
    else
      year.to_s + "–" + now.year.to_s
    end
  end
end

if $0 == __FILE__
  require 'test/unit'
  class CopyrightHelperTest < Test::Unit::TestCase
    include CopyrightHelper
    
    def test_should_return_year_if_copyright_year_is_the_same
      assert_equal "2000", copyright(2000, Time.local(2000))
    end
    def test_should_return_year_range_minus_century_if_the_same_century
      assert_equal "2000&ndash;01", copyright(2000, Time.local(2001))
    end
    def test_should_return_full_year_range_if_different_century
      assert_equal "1999&ndash;2000", copyright(1999, Time.local(2000))
    end
  end
end