Rails教程测试失败

Question

我正在关注Rails教程.. 这是我的测试文件

require 'test_helper'

class StaticPagesControllerTest < ActionDispatch::IntegrationTest

  def setup
    @base_title = "Ruby on Rails Tutorial Sample App"
  end

  test "should get home" do
    get static_pages_home_url
    assert_response :success
    assert_select "title", "Home | #{@base_title}"
  end

  test "should get help" do
    get static_pages_help_url
    assert_response :success
    assert_select "title", "Help | #{@base_title}"
  end

  test "should get about" do
    get static_pages_about_url
    assert_response :success
    assert_select "title", "About | #{@base_title}"
  end
end

这是我收到的错误消息：

Failure:
StaticPagesControllerTest#test_should_get_home 
[c:/Sites/workspace/sample_app/te
st/controllers/static_pages_controller_test.rb:12]:
<Home | Ruby on Rails Tutorial Sample App> expected but was
<Home>..
Expected 0 to be >= 1.

请注意，错误有时会显示“关于/帮助”而不是“家庭”。

顺便说一句，当我在第5到7行注释掉并在每个测试中替换＃{@ base_title}时，rails测试结果就成功了。

与此处发生的事情完全冲突。