Capybara 找不到元标记

Question

Capybara 2.1.0 似乎没有找到任何元标记：

(rdb:1) p page.find 'meta'
*** Capybara::ElementNotFound Exception: Unable to find css "meta"

即使它们出现在page.source ：

(rdb:1) p page.source
"<!doctype html>\n<html>\n<head>\n<title>MyTitle</title>\n<meta charset='utf-8'>\n<meta content='IE=edge,chrome=1' http-equiv='X-UA-Compatible'>\n<meta content='width=device-width, initial-scale=1' name='viewport'>\n<meta name='description'>\n\n..."

Answer 1

解决方案是在find或have_selector使用:visible => false ：

page.should have_css 'meta[name="description"]', visible: false

要么：

page.find 'meta[name="description"]', visible: false

Answer 2

如果您想检查更具体的元数据，包括描述文本等：

https://gist.github.com/Lordnibbler/6247531

RSpec::Matchers.define :have_meta do |name, expected|
  match do |actual|
    has_css?("meta[name='#{name}'][content='#{expected}']")
  end

  failure_message_for_should do |actual|
    actual = first("meta[name='#{name}']")
    if actual
      "expected that meta #{name} would have content='#{expected}' but was '#{actual[:content]}'"
    else
      "expected that meta #{name} would exist with content='#{expected}'"
    end
  end
end

RSpec::Matchers.define :have_title do |expected|
  match do |actual|
    has_css?("title", :text => expected)
  end

  failure_message_for_should do |actual|
    actual = first("title")
    if actual
      "expected that title would have been '#{expected}' but was '#{actual.text}'"
    else
      "expected that title would exist with '#{expected}'"
    end
  end
end

然后，像这样查找元数据：

page.should have_meta(:description, 'Brand new Ruby on Rails TShirts')

从 Spree 借来的爱： https : //github.com/spree/spree/blob/master/core/lib/spree/testing_support/capybara_ext.rb

Answer 3

提议的解决方案在 2021 年不起作用，但以下方法起作用了

page.find('//head/meta[name="description"]', visible: false)[:content]

根据https://rubydoc.info/github/jnicklas/capybara/Capybara/Node/Element

Element 还可以访问元素的 HTML 属性和其他属性：

bar.value bar.text bar[:title]