可以选择在Rails 3功能测试中测试缓存 [英] Optionally testing caching in Rails 3 functional tests

问题描述

通常，我希望功能测试不执行动作缓存。 Rails似乎支持我，在 environment / test.rb 中默认为 config.action_controller.perform_caching = false 。这样会导致正常的功能测试没有测试缓存。

Generally, I want my functional tests to not perform action caching. Rails seems to be on my side, defaulting to config.action_controller.perform_caching = false in environment/test.rb. This leads to normal functional tests not testing the caching.

所以我该如何在Rails 3中测试缓存。

So how do I test caching in Rails 3.

此主题中提出的解决方案似乎很笨拙或对Rails 2不屑一顾：
如何在Rails的功能测试中启用页面缓存？

The solutions proposed in this thread seem rather hacky or taylored towards Rails 2: How to enable page caching in a functional test in rails?

我要执行以下操作：

test "caching of index method" do
  with_caching do
    get :index
    assert_template 'index'
    get :index
    assert_template ''
  end
end

也许还有更好的方法测试缓存是否被命中？

Maybe there is also a better way of testing that the cache was hit?

推荐答案

您可能会终止互相踩踏的测试。您应该使用sure来包装它，并适当地将其重置为旧值。示例：

You're liable to end up with tests stomping on each other. You should wrap this up with ensure and reset it to old values appropriately. An example:

module ActionController::Testing::Caching
  def with_caching(on = true)
    caching = ActionController::Base.perform_caching
    ActionController::Base.perform_caching = on
    yield
  ensure
    ActionController::Base.perform_caching = caching
  end

  def without_caching(&block)
    with_caching(false, &block)
  end
end

我也将其放入模块中，因此您可以将其包含在测试类或父类中。

I've also put this into a module so you can just include this in your test class or parent class.

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