have_tag matcher for HTML build on top of Nokogiri.

Usage

get "/home_page"
response.should be_ok

response.body.should have_tag "#account" do
  with_tag "a", :href => /log_out/
  without_tag "a", :href => /log_in/
end

As shown above have_tag matcher operates on plain strings; however, since it is mostly used with other testing libraries it can also be called directly on response (RSpec) and page (Capybara) i.e.

response.should have_tag...
page.should have_tag

RSpec integration:

require "have_tag"
RSpec.configure do |config|
  config.include HaveTag
end

More examples

html.should have_tag "#header"

html.should have_tag "span", :text => "exact text match"
html.should have_tag "span", :text => /\d{3}-\d{4}/

html.should have_tag "li", :exactly => 3
html.should have_tag "li", :at_least => 1 # default
html.should have_tag "li", :at_most => 10

html.should have_tag "img", :src => "/exact/attribute/match.gif"
html.should have_tag "img", :src => %r{beacon.gif}

html.should have_tag "a", :href => "http://google.com", :target => "_blank"

# using both attribute matching and text/count options
html.should have_tag "li a", {:href => /\?product_id=\d+/}, {:text => /product/, :exactly => 10}

Limiting by context

html.should have_tag "#account" do |account_html|
  # account_html is plain string that holds inner html of #account
  account_html.should include "Welcome, Dmitriy Kalinin"

  account_html.should have_tag "a", :href => /logout/

  with_tag "a", :href => /logout/ # for convenience =)
end

html.should have_tag "#bank_balance.chart" do |chart_html, chart_attributes|
  chart_attributes["data-title"].should == "Bank balance"
  chart_attributes["data-values"].should == [33,293,38,93].join(",")

  with_tag ".legend" do
    with_tag "span.label", {:style => /color:/}, :exactly => 4
  end
end

page.should have_tag "ul#projects" do
  %w(Marketing Dev Support).each do |project|
    with_tag "li a", {:href => /projects\/#{project}/}, :text => project, :exactly => 1
  end
end

response.should have_tag :form, :action => signup_path, :method => :post do
  with_tag :input, :type => :text, :name => :email
  with_tag :input, :type => :password, :name => :password
  with_tag :input, :type => :submit
end

Todos

• make at_least and at_most work together
• keep on improving error reporting