Implementation of have_tag() RSpec matcher using Nokogiri.
An implementation of rspec_on_rails’
have_tag() matcher which does not depend on Rails’
assert_select(). Using Nokogiri instead, the matcher is available to non-Rails projects, and enjoys the full flexibility of Nokogiri’s advanced and blazing fast CSS and XPath selector support.
sudo gem install rspec_tag_matchers --source http://gemcutter.org
- rspec (stating the obvious)
require 'rspec_tag_matchers' Spec::Runner.configure do |config| config.include(RspecTagMatchers) end
As its first argument,
have_tag() accepts any CSS or XPath selectors which are supported by Nokogiri.
body.should have_tag('form[@action*=session]') body.should have_tag('ul > li + li')
Expectations can be placed upon the inner text of the matched element by providing another argument, which should be either a
String or a
body.should have_tag('h1', 'Welcome') body.should have_tag('p', /a very important blurb/i)
Expectations can be placed upon the number of matched elements by passing an options hash:
body.should have_tag('abbr', :count => 1) # exactly one body.should have_tag('dt', :minimum => 4) # at least 4 body.should have_tag('dd', :maximum => 4) # at most 4 body.should have_tag('a.outgoing', /rspec/i, :count => 2)
:count key also accepts a
Range, making the following equivalent:
body.should have_tag('tr', :count => 3..5) body.should have_tag('tr', :minimum => 3, :maximum => 5)
The usage of
with_tag(), however, is no longer supported. Instead, a block passed to
have_tag() will have each matched element successively yielded to it. If none of the blocks return without raising an
ExpectationNotMetError, the outer
have_tag() is treated as having failed:
body.should have_tag('thead') do |thead| thead.should have_tag('th', :count => 5) end
This also allows arbitrary expectations to be applied from within the block, such as:
body.should have_tag('dl dd.sha1') do |dd| dd.inner_text.length.should == 40 end
Currently, this implementation does not support substitution values as assert_select did (by way of
body.should have_tag('li[class=?]', dom_class) body.should have_tag('tr.person#?', /^person-\d+$/)
I (Kyle Hargraves, original author) rarely use these, and Hpricot’s advanced selectors make them mostly useless, as far as I can tell, so I am unlikely to implement them myself.
have_tag() further differs from the
assert_select-based implementation in that the nested
have_tag() calls must all pass on a single selected element in order to be true. This was a source of confusion in RSpec ticket #316. There is a spec covering this case if you need an example.
This project was originally forked from:
Released under the MIT license.
Copyright © 2008 Kyle Hargraves