require 'test/unit'
require 'date'
require 'birthday'

class BirthdayCalculationTest < Test::Unit::TestCase
  def setup
    @birthday = Birthday.new(1981, 11, 4)
  end

  def test_later_month
    today = Date.new(2008, 12, 4)
    assert_equal 335, @birthday.days_from(today)
  end

  def test_earlier_month
    today = Date.new(2008, 10, 4)
    assert_equal 31, @birthday.days_from(today)
  end

  def test_earlier_day
    today = Date.new(2008,11,3)
    assert_equal 1, @birthday.days_from(today)
  end

  def test_later_day
    today = Date.new(2008,11,5)
    assert_equal 364, @birthday.days_from(today)
  end

  def test_same_day
    assert_equal 0, @birthday.days_from(@birthday)
  end

  def test_leap_year
    today = Date.new(2008, 2, 4)
    assert_equal 274, @birthday.days_from(today)

    today = Date.new(2009, 2, 4)
    assert_equal 273, @birthday.days_from(today)
  end
end