ruby-on-rails - Michael Hartl RoR Tuotiral による単純な Rspec テストの失敗

Question

私はまったくの初心者で、Michael Hartl のチュートリアルで Ruby on Rails を学んでいます。私は第3章にいて、aboutページのRspecテストが失敗しています(ホームページとヘルプページではまったく同じテストが失敗していません)。

実行中に発生するエラー$ bundle exec rspec spec/requests/static_pages_spec.rbは次のとおりです。

Failures:

1) Static pages About page should have the content 'About Us'←[31mFailure/Error:←[0m ←[31mvisit 'static_pages/about'←[0m←[31mURI::InvalidURIError←[0m:←[31mthe scheme http does not accept registry part: www.example.com:80static_pages (or bad hostname?)←[0m←[36m     # ./spec/requests/static_pages_spec.rb:24:in `block (3 levels) in <top (required)>'←[0m Finished in 0.0776 seconds←[31m3 examples, 1 failure←[0m

Failed examples:

←[31mrspec ./spec/requests/static_pages_spec.rb:23←[0m ←[36m# Static pages About page should have the content 'About Us'←[0m

ページにアクセスするhttp://localhost:3000/static_pages/aboutと、大きな H1 文字で「About Us」が表示されます。

仕様/リクエスト/static_pages_spec.rb:

require 'spec_helper'

describe "Static pages" do

  describe "Home page" do

    it "should have the content 'Sample App'" do
      visit '/static_pages/home'
      expect(page).to have_content('Sample App')
    end
  end

  describe "Help page" do

    it "should have the content 'Help'" do
      visit '/static_pages/help'
      expect(page).to have_content('Help')
    end
  end

  describe "About page" do

    it "should have the content 'About Us'" do
      visit 'static_pages/about'
      expect(page).to have_content('About Us')
    end
  end
end

config/routes.rb:

SampleApp::Application.routes.draw do
  get "static_pages/home"
  get "static_pages/help"
  get "static_pages/about"
end

アプリ/コントローラー/static_pages_controller.rb:

class StaticPagesController < ApplicationController
  def home
  end

  def help
  end

  def about
  end
end

アプリ/ビュー/about.html.erb:

<h1>About Us</h1>
<p>
  The <a href="http://railstutorial.org/">Ruby on Rails Tutorial</a>
  is a project to make a book and screencasts to teach web development
  with <a href="http://rubyonrails.org/">Ruby on Rails</a>. This
  is the sample application for the tutorial.
</p>