Devise の confirmations_controller にて期間丁度に確認した場合、Mac, Linux での挙動が異なることの検証（デバッグコード）

devise_confirmable.rb

module Devise
  module Models
    module Confirmable
      
      # some code

      protected

        # some code

        def confirmation_period_expired?
          t1, t2, t3 = Time.now, self.confirmation_sent_at, self.confirmation_sent_at + self.class.confirm_within
          Rails.logger.debug("[devise][now]     to_s: #{t1.to_s}, to_i: #{t1.to_i}, usec: #{t1.usec}, subsec: #{t1.subsec}")
          Rails.logger.debug("[devise][sent_at] to_s: #{t2.to_s}, to_i: #{t2.to_i}, usec: #{t2.usec}, subsec: #{t2.subsec}")
          Rails.logger.debug("[devise][added]   to_s: #{t3.to_s}, to_i: #{t3.to_i}, usec: #{t3.usec}, subsec: #{t3.subsec}")
          Rails.logger.debug("[devise] now > added: #{t1 > t3}")
          Rails.logger.debug("[devise] now.subsec > added.subsec: #{t1.subsec > added.subsec}")
          self.class.confirm_within && self.confirmation_sent_at && (Time.now > self.confirmation_sent_at + self.class.confirm_within)
        end
        
        # some code
      end
    end
  end

onfirmations_controller_test.rb

require 'test_helper'

class ConfirmationsControllerTest < ActionController::TestCase

  setup do
    @request.env['devise.mapping'] = Devise.mappings[:user]
  end

  test '登録して10日以内なら確認可' do
    user = create(:user)
    Time.stub(:now, user.confirmation_sent_at + 10.days) do
      t1, t2 = user.confirmation_sent_at, user.confirmation_sent_at + 30.days
      Rails.logger.debug("[test-code][sent_at] to_s: #{t1.to_s}, to_i: #{t1.to_i}, usec: #{t1.usec}, subsec: #{t1.subsec}")
      Rails.logger.debug("[test-code][added]   to_s: #{t2.to_s}, to_i: #{t2.to_i}, usec: #{t2.usec}, subsec: #{t2.subsec}")
      get :show, confirmation_token: user.confirmation_token
    end
    assert user.reload.confirmed?
  end
end