如何使用Capybara 2.0测试页面标题？ [英] How can I test the page title with Capybara 2.0?
问题描述
尝试测试该页面包含< title>我的标题< / title> 并带有：
Trying to test that page contains <title>My Title</title> with:
# spec/features/reports_spec.rb
require 'spec_helper'
feature "Archive Management" do
subject { page }
describe "Index Page" do
before(:all) { 10.times { FactoryGirl.create(:randomreport) } }
after(:all) { Report.delete_all }
describe "when no search terms present" do
before { visit reports_path }
it { should have_selector('title', text: 'My Title') } # <= Fails w/Capybara 2.0
it { should have_selector('title') } # <= passes
it { should have_text('My Title') } # <= passes
it { should have_selector('h2', text: "Welcome") } # <= passes
end
end
end
错误消息：
Failure/Error: it { should have_selector('title', text: base_title) }
Capybara::ExpectationNotMet:
expected to find css "title" with text "My Title" but there were no matches. Also found "", which matched the selector but not all filters.
我知道我正在忽略明显的痛苦，但无法弄清楚这是什么吗？ < title> 标签不再被视为选择器吗？！要么...？！？
I know I'm overlooking the painfully obvious but can't figure out what it is? Are <title> tags no longer considered 'selectors'?!? Or...?!?
编辑（调试器信息）：
如果我进入调试器正如@shioyama巧妙建议的那样，很明显page.body包含< title>我的标题< / title> 。包含< h2>欢迎访问我的标题项目< / h2> 的同一page.body并通过！
If I drop down into the debugger as cleverly suggested by @shioyama it is clear that the page.body contains <title>My Title</title>. The same page.body that contains <h2>Welcome to My Title Project</h2> and passes!
似乎找到了< title> ... < / title> ; 标记，但其中没有 My Title 标记。但是它确实会在页面< a href = \ / \ class = \ brand\内的页面中找到和/或我的标题 >我的标题< / a> < h2>欢迎来到我的标题项目< / h2> ：
It appears to find the <title>...</title> tag but not My Title within it. But it does find My Title later in the page within <a href=\"/\" class=\"brand\">My Title</a> and/or in <h2>Welcome to The My Title Project</h2>:
(rdb:1) p page
#<Capybara::Session>
(rdb:1) p page.body
"<!DOCTYPE html>\n<html>\n<head>\n<title>My Title</title>\n
<meta content='research, report, technology' name='keywords'>\n<meta
content='Some Project' name='description'>\n<link href=\"/assets/application.css\"
...
</head>\n<body>\n<header class='navbar navbar-fixed-top
navbar-inverse'>\n<div class='navbar-inner'>\n<div class='container'>\n
<a href=\"/\" class=\"brand\">My Title</a>\n<div class='pull-right'>\n
<ul class='nav'>\n<li><a href=\"/about\">About</a></li>\n<li><a href=\"/help\">Help</a>
</li>\n</ul>\n<form accept-charset=\"UTF-8\" action=\"/reports\"
class=\"navbar-search\" method=\"get\"><div style=\"margin:0;padding:0;display:inline\">
<input name=\"utf8\" type=\"hidden\" value=\"✓\" /></div>\n
<input class=\"search-query\" id=\"query\" name=\"query\"
placeholder=\"Search\" type=\"text\" />\n</form>\n\n</div>\n</div>\n</div>\n</header>\n\n
<div class='container'>\n<div class='hero-unit center'>\n<h1>My Title</h1>\n
<h2>Welcome to The My Title Project</h2>\n<p>Lorem ipsum dolor sit amet, consectetur
adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
...
我还可以在调试器中尝试什么以找出为什么have_selector？ （'title'，text：...）失败了？
What else could I try in the debugger to figure out why have_selector?('title', text: ...) is failing?
那么，在Capybara 2.0中测试标题的正确方法是什么？
推荐答案
升级到Capybara 2.0时遇到了相同的问题，并通过创建以下自定义RSpec来解决了这些问题使用 Capybara.string ：
I had the same issues when I upgraded to Capybara 2.0, and managed to solve them by creating the following custom RSpec matcher using Capybara.string:
spec / support / utilities.rb
RSpec::Matchers::define :have_title do |text|
match do |page|
Capybara.string(page.body).has_selector?('title', text: text)
end
end
现在，在主题{页面} 的规范文件中，我可以使用：
Now, in a spec file where subject { page }, I can use:
it { should have_title("My Title") }
it { should_not have_title("My Title") }
顺便说一句，关于这个问题的讨论对我找到答案非常有帮助，所以谢谢！
As an aside, the conversation on this question was extremely helpful in getting me to this answer, so thank you!
如果您不想创建自定义RSpec匹配器，请使用用户 dimuch 给出的StackOverflow答案，我现在知道您可以直接在have_selector nofollow noreferrer> page.source （别名为 page.body ）来测试是否不可见e DOM元素：
If you don't want to create a custom RSpec matcher, thanks to this StackOverflow answer by user dimuch I now know that you can call have_selector directly on page.source (aliased page.body) to test for non-visible DOM elements:
it "should show the correct title" do
page.source.should have_selector('title', text: 'My Title')
end
或其中主题{页面} ：
its(:source) { should have_selector('title', text: 'My Title') }
更新2：
从Capybara 2.1开始，内置了 have_title / has_title？匹配器，不需要此答案中的自定义RSpec匹配器。此外，更新1中描述的 its（：source）{...} 测试似乎在Capybara 2.1下无法使用；我已经确认 have_title / has_title？可以正常工作，所以如果可能，最好使用以下语法您计划升级：
Update 2:
From Capybara 2.1, there are built-in have_title/has_title? matchers, negating the need for the custom RSpec matcher in this answer. Furthermore, the its(:source) { ... } tests described in Update 1 seem to break under Capybara 2.1; I've confirmed the have_title/has_title? work as expected, so it's probably best to go with the following syntax if you plan on upgrading:
当主题{页面} ：
it { should have_title("My Title") }
it { should_not have_title("My Title") }
在内使用 / expect 语法时场景块：
expect(page).to have_title("My Title")
expect(page).to_not have_title("My Title")
这篇关于如何使用Capybara 2.0测试页面标题？的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！
