Rspec 让范围界定 [英] Rspec let scoping

问题描述

我相信我在 rspec let 和范围界定方面有问题.我可以在示例中使用 let 定义的方法(it"块)，但不能在外部(我执行 let 的 describe 块)中使用.

I believe I have a problem with rspec let and scoping. I can use the methods defined with let in examples (the "it" blocks), but not outside (the describe block where I did the let).

5   describe Connection do
8     let(:connection) { described_class.new(connection_settings) }
9 
10    it_behaves_like "any connection", connection
24  end

当我尝试运行此规范时，出现错误:

When I try to run this spec, I get the error:

connection_spec.rb:10: 未定义的本地变量或方法连接"类:0xae8e5b8(NameError)

connection_spec.rb:10: undefined local variable or method `connection' for Class:0xae8e5b8 (NameError)

如何将连接参数传递给 it_behaves_like?

How can I pass the connection parameter to the it_behaves_like?

推荐答案

我找到了适合我的方法:

I found what works for me:

   describe Connection do
     it_behaves_like "any connection", new.connection
     # new.connection: because we're in the class context 
     # and let creates method in the instance context, 
     # instantiate a instance of whatever we're in
   end

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