如何伪造 Time.now? [英] How to fake Time.now?

问题描述

为了在单元测试中测试时间敏感的方法，设置 Time.now 的最佳方法是什么?

What's the best way to set Time.now for the purpose of testing time-sensitive methods in a unit test?

推荐答案

我真的很喜欢 Timecop 库.您可以以块形式进行时间扭曲(就像时间扭曲一样):

I really like the Timecop library. You can do time warps in block form (just like time-warp):

Timecop.travel(6.days.ago) do
  @model = TimeSensitiveMode.new
end
assert @model.times_up!

(是的，你可以嵌套块形式的时间旅行.)

(Yes, you can nest block-form time travel.)

您也可以进行声明式时间旅行:

You can also do declarative time travel:

class MyTest < Test::Unit::TestCase
  def setup
    Timecop.travel(...)
  end
  def teardown
    Timecop.return
  end
end

我有一些 cucumber 帮助 Timecop 这里.它们让您执行以下操作:

I have some cucumber helpers for Timecop here. They let you do things like:

Given it is currently January 24, 2008
And I go to the new post page
And I fill in "title" with "An old post"
And I fill in "body" with "..."
And I press "Submit"
And we jump in our Delorean and return to the present
When I go to the home page
I should not see "An old post"

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