ruby-on-rails – 如何正确冻结时间w / Timecop在我的规格？

我正在尝试使用Timecop的组合并查询其中的isl where_sql数据,但是我似乎无法让Timecop实际上冻结时间.我已经尝试了Timecop.freeze和Timecop.freeze(Time.now),当我在规范中使用Time.now时,这两个都是稍微关闭的.

我失踪了什么Ruby 1.9.2,Rails 3.1.0.rc5

–

错误

Failure/Error: Game.unreleased.arel.where_sql.should eq("WHERE (release_date > '#{Time.now}')")


     expected "WHERE (release_date > '0000-01-01 00:00:00 -0500')"
     got "WHERE (release_date > '0000-01-01 05:00:00.000000')"

模型

scope :unreleased,lambda { |limit = 4| where('release_date > ?',Time.now).
                                        order('release_date asc').
                                        limit(limit) }

规范

it "should retrieve games with a release date later than today" do
  Timecop.freeze
  Game.unreleased.arel.where_sql.should eq("WHERE (release_date > '#{Time.now}')")
end

Timecop.travel(Time.zone.local(2010,6,1,13,0)) do
  .. time sensitive spec here ..
end