如何将模块混合到 rspec 上下文中 [英] How to mix a module into an rspec context

问题描述

如何将模块混合到 rspec 上下文(又名 describe)中，以便模块的常量可用于规范?

How can I mix a module into an rspec context (aka describe), such that the module's constants are available to the spec?

module Foo
  FOO = 1
end

describe 'constants in rspec' do

  include Foo

  p const_get(:FOO)    # => 1
  p FOO                # uninitialized constant FOO (NameError)

end

const_get 可以在常量名不感兴趣的情况下检索常量.是什么导致了 rspec 的奇怪行为?

That const_get can retrieve the constant when the name of the constant cannot is interesting. What's causing rspec's curious behavior?

我使用的是 MRI 1.9.1 和 rspec 2.8.0.症状与MRI 1.8.7相同.

I am using MRI 1.9.1 and rspec 2.8.0. The symptoms are the same with MRI 1.8.7.

推荐答案

你可以使用RSpec的shared_context:

You can use RSpec's shared_context:

shared_context 'constants' do
  FOO = 1
end

describe Model do
  include_context 'constants'

  p FOO    # => 1
end

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