require 'test/unit'
require 'tzinfo_timezone'

class TzinfoTimezoneTest < Test::Unit::TestCase
  TzinfoTimezone::MAPPING.keys.each do |name|
    define_method("test_map_#{name.downcase.gsub(/[^a-z]/, '_')}_to_tzinfo") do
      zone = TzinfoTimezone[name]
      assert_not_nil zone.tzinfo
    end
  end

  TzinfoTimezone.all.each do |zone|
    name = zone.name.downcase.gsub(/[^a-z]/, '_')
    define_method("test_from_#{name}_to_map") do
      assert_not_nil TzinfoTimezone[zone.name]
    end

    define_method("test_utc_offset_for_#{name}") do
      period = zone.tzinfo.period_for_utc(Time.utc(2006,1,1,0,0,0))
      assert_equal period.utc_offset, zone.utc_offset
    end
  end
  
  def test_dst_utc_offset_in_standard_time
    zone = TzinfoTimezone["Central Time (US & Canada)"]
    time = Time.utc(2008, 3, 9)
    assert_equal zone.utc_offset, zone.dst_utc_offset(time)
  end
  
  def test_dst_utc_offset_in_daylight_time
    zone = TzinfoTimezone["Central Time (US & Canada)"]
    time = Time.utc(2008, 3, 9, 12)
    assert_equal zone.utc_offset + 3600, zone.dst_utc_offset(time)
  end
end