在Ruby 1.9.3中通过RSpec配置包含命名空间模块

I like to use RSpec's include configuration method to include modules which are only for namespacing so that I don't have to use fully-qualified names for their inner classes and modules. This worked fine with RSpec 2.11.0 in Ruby 1.9.2. But now on Ruby 1.9.3 this doesn't work anymore. How can I get it working again?

我喜欢使用RSpec的包含配置方法来包含仅用于命名空间的模块，这样我就不必为它们的内部类和模块使用完全限定的名称。这在Ruby 1.9.2中的RSpec 2.11.0中运行良好。但是现在在Ruby 1.9.3上，它已经不能工作了。我怎么才能让它再次工作呢?

Here an example foobar_spec.rb:

这里foobar_spec.rb一个例子:

module Foo
  class Bar
  end
end

RSpec.configure do |config|
  config.include Foo
end

describe Foo::Bar do
  it "should work" do
    Bar.new
  end
end

If you call it by the following command:

如果您用以下命令调用它:

rspec foobar_spec.rb

It will work in Ruby 1.9.2 just fine. But it will raise the following error in Ruby 1.9.3:

它将在Ruby 1.9.2中正常工作。但是会在Ruby 1.9.3中出现如下错误:

Failure/Error: Bar.new
     NameError:
       uninitialized constant Bar

3 个解决方案

#1

This mailing list entry discusses the root change in 1.9.3 as to how constants are looked up, so it looks like a deliberate change.

这个邮件列表条目讨论了1.9.3中关于如何查找常量的根更改，因此它看起来像是一个经过深思熟虑的更改。

You could scope the whole test, like this:

您可以对整个测试进行限定，如下所示:

module Foo
  describe Bar do
    it "should work" do
      Bar.new
    end
  end
end

As another solution, you could extract the new object creation to a before or let or just define the object as the subject of the test.

作为另一种解决方案，您可以将新的对象创建提取到一个之前，或者将对象定义为测试的主题。

#2

If your goal is to only have to specify the namespace once, then the idiomatic RSpec way is to use described_class. Like this:

如果您的目标是只指定名称空间一次，那么惯用的RSpec方法是使用descripbed_class。是这样的:

module Foo
  class Bar
  end
end

describe Foo::Bar do
  it "should work" do
    described_class.new
  end
end

#3

You need to use Foo::Bar in the it block as well as in the describe argument.

您需要使用Foo::Bar在it块中以及在描述参数中。

#1