是否在RSpec中访问父作用域主题？

Question

在RSpec中定义当前作用域的主题(细化主题)时，如何访问父作用域的主题？

示例代码：

describe MyModule.method(:some_method) do

  context "when called with a String" do
    let(:string) { "Hey there!" }

    # I want to refine the subject using the parent scope's subject - common case
    # is applying a subject method. Something like:
    subject { super.subject.call string }

    # Use subject...

  end # when called with a String

end # MyModule.some_method

Answer 1

好的，感谢@mudasobwa来自上面的评论，这是解决方案：

您需要显式地不带参数地调用super() -- super本身是行不通的，因为它试图使用Ruby隐式传递参数，但以失败告终。

更正示例：

describe MyModule.method(:some_method) do

  context "when called with a String" do
    let(:string) { "Hey there!" }

    # Note the explicit `()`:
    subject { super().call string }

    # Use subject...

  end # when called with a String

end # MyModule.some_method

Answer 2

你可以给你的主题命名：

context do 
  subject(:my_thing) { described_class.new }

  context '#do_stuff'
    subject { my_thing.do_stuff }

    it { expect(subject).to ... } # or
    it { is_expected.to ... }
  end
end