Question

给出Rails的rspec视图规范，

RSpec.describe "plots/show", type: :view do
  describe "displaying inoculation" do
    context "inoculated" do
      it "displays 'Yes'" do
        assign(:plot, build(:plot))
        render
        expect(rendered).to have_content("Inoculated? Yes")
      end
    end
  end
end

当我尝试将隐式主题样式与it {}，

一起使用时

context "inoculated" do
  before do
    assign(:plot, build(:plot))
    render
  end
  it { is_expected.to have_content("Inoculated? Yes") }
end

测试失败，期望找到文本＆＃34;接种？是＆＃34; in＆＃34; inoculated＆＃34; 。

我预计隐式主题将是视图，但主题是传递给context的字符串。为什么不查看规范将视图作为规范的隐含主题？

Answer 1

与视图规格无关。在确定默认主题时，它会尝试在嵌套描述链中查找类引用。如果找到，则采用最内层的类。如果没有找到，它会取最里面的值（大概是一个字符串）。

RSpec.describe User do
  describe 'foo' do
    describe 'bar' do
      it { puts subject }
      it { puts subject.class }
    end
  end
end

RSpec.describe 'User' do
  describe 'foo' do
    describe 'bar' do
      it { puts subject }
      it { puts subject.class }
    end
  end
end

RSpec.describe 'User' do
  describe Project do
    describe 'bar' do
      it { puts subject }
      it { puts subject.class }
    end
  end
end

输出

#<User:0x007fe77593af80>
User
bar
String
#<Project:0x007fe7924f9170>
Project

一切都从这里开始，顺便说一下（如果你也倾向于做一些挖掘）：

From: /Users/sergio/.gem/ruby/2.4.1/gems/rspec-core-3.6.0/lib/rspec/core/memoized_helpers.rb @ line 57:
Owner: RSpec::Core::MemoizedHelpers
Visibility: public
Number of lines: 6

def subject
  __memoized.fetch_or_store(:subject) do
    described = described_class || self.class.metadata.fetch(:description_args).first
    Class === described ? described.new : described
  end
end

rspec视图规范的默认主题是什么？

1 个答案:

输出