Question

我正在进行Michael Hartl's Rails Tutorial的第5章练习，并试图了解Rails / Rspec如何在full_title中测试辅助方法app/helpers/application_helper.rb。我的所有测试都在spec/requests/static_pages_spec.rb，在其中，我正在调用full_title以减少代码膨胀。

因此，为了测试原始full_title，我在spec/helpers/application_helpers_spec.rb中创建了一个测试，并通过spec/support/utilities.rb包含它。代码正在传递，但我想了解正在进行的过程（对操作的顺序）。谢谢。

我可以这样想吗？

Rspec开始运行static_pages_spec.rb（包括utilities.rb）
Rspec在static_pages_spec.rb
Rspec开始运行application_helper_spec.rb
Rspec在describe "full_title" do

application_helper_spec.rb

Rspec查找原始full_title方法并完成application_helper_spec.rb
Rspec在static_pages_spec.rb中完成测试, iterating through above process when full_title`被调用。

static_pages_spec.rb

require 'spec_helper'

describe "Static pages" do

  subject { page }

  shared_examples_for "all static pages" do
    it { should have_selector('h1',    text: heading) }
    it { should have_selector('title', text: full_title(page_title)) }
  end

  describe "Home page" do
    before { visit root_path }
    let(:heading)    { 'Sample App' }
    let(:page_title) { '' }

    it_should_behave_like "all static pages"
    it { should_not have_selector 'title', text: '| Home' }
  end

  describe "Help page" do
    before { visit help_path }
    let(:heading) { 'Help' }
    let(:page_title) { 'Help' }

    it_should_behave_like "all static pages"
  end

  describe "About page" do
    before { visit about_path }
    let(:heading) { 'About' }
    let(:page_title) { 'About Us' }

    it_should_behave_like "all static pages"
  end

  describe "Contact page" do
    before { visit contact_path }
    let(:heading) { 'Contact' }
    let(:page_title) { 'Contact' }

    it_should_behave_like "all static pages"   
  end

  it "should have the right links on the layout" do
    visit root_path
    click_link "About"
    page.should have_selector 'title', text: full_title('About Us')
    click_link "Help"
    page.should have_selector 'title', text: full_title('Help')
    click_link "Contact"
    page.should have_selector 'title', text: full_title('Contact')
    click_link "Home"
    page.should have_selector 'title', text: full_title('')
    click_link "Sign up now!"
    page.should have_selector 'title', text: full_title('Sign up')
    click_link "sample app"
    page.should_not have_selector 'title', text: full_title('| Home')
  end
end

application_helper_spec.rb

require 'spec_helper'

describe ApplicationHelper do

  describe "full_title" do
    it "should include the page title" do
      full_title("foo").should =~ /foo/
    end

    it "should include the base title" do
      full_title("foo").should =~ /^Ruby on Rails Tutorial Sample App/
    end

    it "should not include a bar for the home page" do
      full_title("").should_not =~ /\|/
    end
  end
end

application_helper.rb

module ApplicationHelper

    #Returns the full title on a per-page basis.
    def full_title(page_title)
        base_title = "Ruby on Rails Tutorial Sample App"
        if page_title.empty?
            base_title
        else
            "#{base_title} | #{page_title}"
        end
    end
end

Answer 1

以这种方式思考：

static_pages_spec.rb（包括utilities.rb）中调用的'full_title'正在运行application_helper.rb中描述的'full_title'方法。

application_helper_spec.rb验证通过full_title传递的字符串/值（page_title）。如果我没有弄错的话，每次在测试中调用full_title方法时都会这样做。

Rails / RSpec - 为原始辅助方法编写测试

1 个答案: