capybara-validate_html5 validates the HTML5 for each page accessed, and fails if there are any HTML5 parse errors on the page. This makes it easy to automatically test for HTML5 validity when running your normal capybara test suite.

This only works for the rack-test driver, and only works when using minitest-global_expectations for testing.

gem install capybara-validate_html5

Source code is available on GitHub at github.com/jeremyevans/capybara-validate_html5

require 'capybara'
require 'capybara/validate_html5'
require 'minitest/global_expectations'

describe 'capybara-validate_html5' do
  include Rack::Test::Methods
  include Capybara::DSL

  def app
    MyRackApp
  end

  it "should allow restoring of state" do
    visit '/' # validates HTML, fails spec if not valid

    skip_html_validation do
      click_button 'Submit' # doesn't validate resulting HTML
    end

    click_link 'Go Somewhere' # validates HTML, fails spec if not valid
  end
end

MIT

Jeremy Evans <code@jeremyevans.net>