date time abstraction that enables tests to manipulate the current date

d_t.rb

module DT

  extend self

  DEFAULT_TIME_ZONE = 'Lisbon'

  def now
    (mock_data(:now) || DateTime.now).utc
  end

  def datetime_for_query(date, time_zone = DEFAULT_TIME_ZONE)
    I18n.l(date.in_time_zone(time_zone), format: '%Y-%m-%d %H:%M:%S.%6N')
  end

  def set_mock(key, data)
    mocks[key] = data
  end

  protected ######################## PROTECTED ###########################

  def mocks
    @mocks ||= {}
  end

  def mock_data(key)
    return nil if ENV['ENV'] != 'test'

    mocks[key]
  end

end