require File.join(File.expand_path(File.dirname(__FILE__)), 'test_utils')

include TZInfo

class TCDataTimezone < Minitest::Test
  
  class TestTimezoneInfo < TimezoneInfo
    attr_reader :utc
    attr_reader :local
    attr_reader :utc_to
    attr_reader :utc_from
    
    def initialize(identifier, utc_period, local_periods, transitions_up_to)
      super(identifier)
      @utc_period = utc_period
      @local_periods = local_periods || []
      @transitions_up_to = transitions_up_to
    end
    
    def period_for_utc(utc)
      @utc = utc
      @utc_period     
    end
    
    def periods_for_local(local)
      @local = local      
      @local_periods
    end
    
    def transitions_up_to(utc_to, utc_from = nil)
      @utc_to = utc_to
      @utc_from = utc_from
      @transitions_up_to
    end
  end    

  def test_identifier
    tz = DataTimezone.new(TestTimezoneInfo.new('Test/Zone', nil, [], []))
    assert_equal('Test/Zone', tz.identifier)
  end
  
  def test_period_for_utc
    # Don't need actual TimezonePeriods. DataTimezone isn't supposed to do
    # anything with them apart from return them.
    period = Object.new 
    tti = TestTimezoneInfo.new('Test/Zone', period, [], [])
    tz = DataTimezone.new(tti)
    
    t = Time.utc(2006, 6, 27, 22, 50, 12)
    assert_same(period, tz.period_for_utc(t))
    assert_same(t, tti.utc)    
  end
  
  def test_periods_for_local
    # Don't need actual TimezonePeriods. DataTimezone isn't supposed to do
    # anything with them apart from return them.
    periods = [Object.new, Object.new] 
    tti = TestTimezoneInfo.new('Test/Zone', nil, periods, [])
    tz = DataTimezone.new(tti)
    
    t = Time.utc(2006, 6, 27, 22, 50, 12)
    assert_same(periods, tz.periods_for_local(t))
    assert_same(t, tti.local)  
  end
  
  def test_periods_for_local_not_found
    periods = []
    tti = TestTimezoneInfo.new('Test/Zone', nil, periods, [])
    tz = DataTimezone.new(tti)
    
    t = Time.utc(2006, 6, 27, 22, 50, 12)
    assert_same(periods, tz.periods_for_local(t))
    assert_same(t, tti.local)
  end
  
  def test_transitions_up_to
    # Don't need actual TimezoneTransition instances. DataTimezone isn't
    # supposed to do anything with them apart from return them.
    transitions = [Object.new, Object.new]
    tti = TestTimezoneInfo.new('Test/Zone', nil, nil, transitions)
    tz = DataTimezone.new(tti)
    
    utc_to = Time.utc(2013, 1, 1, 0, 0, 0)
    utc_from = Time.utc(2012, 1, 1, 0, 0, 0)
    assert_same(transitions, tz.transitions_up_to(utc_to, utc_from))
    assert_same(utc_to, tti.utc_to)
    assert_same(utc_from, tti.utc_from)
  end
  
  def test_canonical_identifier
    tz = DataTimezone.new(TestTimezoneInfo.new('Test/Zone', nil, [], []))
    assert_equal('Test/Zone', tz.canonical_identifier)    
  end
  
  def test_canonical_zone
    tz = DataTimezone.new(TestTimezoneInfo.new('Test/Zone', nil, [], []))
    assert_same(tz, tz.canonical_zone)
  end
end