Date.to_mongo

cached_event.rb

class Date
  def self.to_mongo(value)
    if value.nil? || value == ''
      nil
    else
      date = value.is_a?(::Date) || value.is_a?(::Time) ? value : ::Date.parse(value.to_s)
      ::Time.utc(date.year, date.month, date.day, date.try(:hour), date.try(:min), date.try(:sec))
    end
  rescue
    nil
  end
end

date_test.rb

  def test_Date_to_mongo_method
    datetime = DateTime.new(2011,12,8,11,05,9) #Thu, 08 Dec 2011 11:05:09 +0000
    date = "12/08/2011".to_date # Thu, 08 Dec 2011
    assert_nil Date.to_mongo(nil) #passing nil
    assert_nil Date.to_mongo('') # passing empty string
    assert_nil Date.to_mongo('bla') #passing string
    assert Date.to_mongo('12/08/2011').eql?(date.to_datetime.to_time) #converts stringlike dates without time
    assert Date.to_mongo(datetime).eql?(datetime.to_time) #converts date with hour,min,sec
    assert Date.to_mongo(date).eql?(date.to_datetime.to_time) #converts date without time
  end