require 'spec_helper'

feature 'View the homepage' do
  scenario 'user sees relevant page title' do
    visit root_path
    expect(page).to have_css('title',text: "Todo")
  end
end

失败的消息是：

1) View the homepage user sees relevant page title
 Failure/Error: expect(page).to have_css('title',text: "Todo")
 Capybara::ExpectationNotMet:
   expected to find css "title" with text "Todo" but there were no matches. Also
   found "",which matched the selector but not all filters.

标题元素和正确的文本在渲染页面上

但是当我在功能规格中更改这一行时：

expect(page).to have_css('title',text: "Todo")

到这个：

page.has_css?('title',text: "Todo")

然后测试通过. [编辑 – 但是从@JustinKo看到这个测试不是一个很好的测试,因为它总是会通过]

如何获得has_css(…)表单的工作？是配置问题吗？

这是我的Gemfile的相关部分：

group :development,:test do
  gem 'rspec-rails' 
  gem 'capybara'
end

而我的spec / spec_helper.rb设置如下：

ENV["RAILS_ENV"] ||= 'test'
require File.expand_path("../../config/environment",__FILE__)
require 'rspec/rails'
require 'rspec/autorun'
require 'capybara/rails'
require 'capybara/rspec'

Dir[Rails.root.join("spec/support/**/*.rb")].each { |f| require f }

RSpec.configure do |config|

  # out of the Box rspec config code ommitted

  config.include Capybara::DSL
end

任何人知道我可能做错了什么？