Rails 4.2, rspec 3.3, capybara 2.4 gives f.QueryInterface not a function?

Question

I want to run function specifications in my rails application that runs on ubuntu.

I ran into this error:

f.QueryInterface is not a function 

The following are the steps to reproduce this problem:

 Install ubuntu Install ruby 2.2.2p95 gem install rails -v 4.2.1 cd /tmp/ rails new myapp 

vi gemfile, so I have the following:

 ruby "2.2.2" source 'https://rubygems.org' gem 'thin' ,'1.6.3' gem 'rails_12factor','0.0.3' gem 'haml', '4.0.6' gem 'haml-rails', '0.9.0' gem 'pg', '0.18.1' gem 'rails', '4.2.1' gem 'sass-rails', '~> 5.0' gem 'uglifier', '>= 1.3.0' gem 'coffee-rails', '~> 4.1.0' gem 'jquery-rails' gem 'turbolinks' gem 'jbuilder', '~> 2.0' group :development, :test do gem 'websocket' ,'1.2.2' gem 'ffi' ,'1.9.8' gem 'childprocess' ,'0.5.6' gem 'rubyzip' ,'1.1.7' gem 'selenium-webdriver','2.46.2' gem 'xpath' ,'2.0.0' gem 'capybara' ,'2.4.4' gem 'rspec-support' ,'3.3.0' gem 'diff-lcs' ,'1.2.5' gem 'rspec-mocks' ,'3.3.0' gem 'rspec-expectations','3.3.0' gem 'rspec-core' ,'3.3.1' gem 'rspec-rails' ,'3.3.2' gem 'therubyracer', platforms: :ruby gem 'byebug' gem 'web-console', '~> 2.0' end 

Then do the following:

 cd /tmp/myapp/ bundle install bin/rails g rspec:install echo "require 'capybara/rspec'" >> spec/spec_helper.rb mkdir spec/features/ 

Then do the following:

 vi spec/features/myfeature_spec.rb 

so i have this syntax:

 describe 'some stuff which requires js', :js => true, :type => :feature do it 'does something' do visit '/hi/index' end end 

Then do the following:

 bin/rails g controller hi index bundle exec rspec spec/features/myfeature_spec.rb 

screen dump of what i see:

 dan@ann15 :/tmp/myapp $ bundle exec rspec spec/features/myfeature_spec.rb F Failures: 1) some stuff which requires js does something Failure/Error: visit '/hi/index' Selenium::WebDriver::Error::UnknownError: f.QueryInterface is not a function # [remote server] file:///tmp/webdriver-profile20150621-14411-2ycb1y/extensions/ [e-mail] /components/driver-component.js:10160:in `FirefoxDriver.prototype.get' # [remote server] file:///tmp/webdriver-profile20150621-14411-2ycb1y/extensions/ [e-mail] /components/command-processor.js:12282:in `DelayedCommand.prototype.executeInternal_/h' # [remote server] file:///tmp/webdriver-profile20150621-14411-2ycb1y/extensions/ [e-mail] /components/command-processor.js:12287:in `DelayedCommand.prototype.executeInternal_' # [remote server] file:///tmp/webdriver-profile20150621-14411-2ycb1y/extensions/ [e-mail] /components/command-processor.js:12229:in `DelayedCommand.prototype.execute/<' # ./spec/features/myfeature_spec.rb:4:in `block (2 levels) in <top (required)>' Finished in 7 seconds (files took 0.35894 seconds to load) 1 example, 1 failure Failed examples: rspec ./spec/features/myfeature_spec.rb:3 # some stuff which requires js does something dan@ann15 :/tmp/myapp $ dan@ann15 :/tmp/myapp $ dan@ann15 :/tmp/myapp $ 

I think this should not cause errors.

I follow the instructions that I see at this URL: https://github.com/jnicklas/capybara#using-capybara-with-rspec

I suspect a mistake in the documentation. I doubt that I have all the steps that I need to complete.

What steps should I follow to get this to work?