Duct-tape HTML testing. No capybaras were required and/or harmed during development

css_matchers.rb

require "nokogiri"

RSpec::Matchers.define :have_elements_matching do |selector|
  match do |view|
    Nokogiri::HTML(view).match(selector).any?
  end
end

RSpec::Matchers.define :have_one_element_matching do |selector|
  match do |view|
    Nokogiri::HTML(view).match(selector).size == 1
  end
end

RSpec::Matchers.define :have_input do |name|
  match do |view|
    # Workaround for Nokogiri weirdness since it apparently doesn't understand
    # escaped CSS selectors
    Nokogiri::HTML(view).css("input").any? { |e| e["name"] == name }
  end
end

# Type-specific matchers lol
%w[text email password].each do |type|
  RSpec::Matchers.define :"have_#{type}_input" do |name = nil|
    match do |view|
      # See above
      if name
        Nokogiri::HTML(view).css("input").any? { |e| e["name"] == name && e["type"] == type }
      else
        Nokogiri::HTML(view).css("input").any? { |e| e["type"] == type }
      end
    end
  end
end