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have_tag() without Rails' assert_select()
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= rspec_hpricot_matchers An implementation of have_tag(), as in rspec_on_rails, but sitting atop Nokogiri rather than merely wrapping assert_select(). So at one point it was on Hpricot. But it's not now. Misnomers are more fun. You're probably better off using something like Webrat::Matchers anyhow. == Installation To use rspec_hpricot_matchers in your project, install the gem, and add the following to your spec_helper.rb file: require 'rspec_hpricot_matchers' Spec::Runner.configure do |config| config.include(RspecHpricotMatchers) end Similarly, to make the matchers available to stories, you can add the following to your stories/helper.rb file: require 'rspec_hpricot_matchers' include RspecHpricotMatchers == Usage As its first argument, have_tag() accepts any CSS or XPath selectors which are supported by Hpricot. 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 Regexp: 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) The :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 == Notes Currently, this implementation does not support substitution values as assert_select did (by way of HTML::Selector): # Not yet supported: body.should have_tag('li[class=?]', dom_class) body.should have_tag('tr.person#?', /^person-\d+$/) I personally 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. This 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.