訪問RSpec中的父範圍主題？

Question

如何在RSpec中定義當前範圍的主題（改進主題）時訪問父範圍的主題？

示例代碼：

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

OK，信貸從上述評論@mudasobwa，這裏的解決方案：

你需要調用super()與明確沒有參數 - super不會單獨工作，因爲它試圖使用Ruby的隱式傳遞參數並失敗。

更正例如：

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

你能說出你的主題：

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