Code examples from my post 'Testing PURE javascript templates from RSpec'

_person_template.html.erb

<div id="person-template" class="name"/>
 

_person_template.html.erb_spec.rb

require 'spec_helper'

describe "persons/_person_template.html.erb" do
  it "should render a proper container for the person" do
    person = {:name=>"Jorge"}
    render_javascript_template(person) do |rendered_text|
      rendered_text.should have_selector("div.name", :content=>"Jorge")
    end
  end
end

gistfile4.txt

ViewHelpers.rb

module ViewHelpers
  
  def render_javascript_template(data)
    render
    include_javascript_files
    yield do_render_javascript_template(data)    
  end
  
  def include_javascript_files
    %w{jquery.js pure.js}.each {|file| js("load('public/javascripts/#{file}');")}
  end
  
  def as_javascript_string(text)
    text.split("\n").collect{|line| "'#{line}'"}.join('+')
  end
  
  def template_id_from_path(template_path)
    template_path.gsub(/^(.+\/_)/, "").gsub(/_/, "-").gsub(/.html.erb$/, "")
  end
  
  def do_render_javascript_template(data)
    json_data = as_javascript_string(data.to_json)
    template_id = template_id_from_path(self.class.description_parts.first)
    js("var data=$.parseJSON(#{json_data});")
    js("var $template = $('##{template_id}').clone().appendTo($('<div></div>'));")
    js("var renderedElement = $template.autoRender(data);")
    return js("$('<div></div>').append(renderedElement).html()")
  end
  
end

Code from the post Testing PURE javascript templates from RSpec