最后与规范代码相关的重构

Question

我使用的是Ruby on Rails 3.1.0和rspec-rails 2 gem。我想在我的规范文件中重构以下示例代码：

describe "Making things" do
  it "should make a thing" do
    # Make the thing
    ...

    # This is the same statement as that present in the "should make another
    # thing" example (read below for more information)
    response.body.should include("Hello World")
  end

  it "should make another thing" do
    # Make another thing
    ...

    # The same statement as that present in the "should make a thing" example
    response.body.should include("Hello World")
  end
end

我如何重构上面的response.body.should include("Hello World")代码，以便编写更少的代码？也就是说，如何使用一个对两个规范示例都有效的语句来测试response.body内容？

Answer 1

使用shared_examples_for。

如下所示：

describe "Making things" do
  before do
    @user.new
  end

  shared_examples_for "normal case" do
    it "shows hello world" do
      response.body.should include("Hello World")
    end

    # more tests could be here

  end

  context "making a thing" do
    before(:each) do
      # make thing
    end
    it_should_behave_like_a "normal case"          
  end

  context "making another thing" do
    before(:each) do
      # make another thing
    end
    it_should_behave_like_a "normal case"          
  end
end

请参阅文档here。