Javascript tests with RSpec, Capybara and PhantomJS. An example.

Gemfile

group :test do
  gem 'capybara'
  gem 'poltergeist'
end

javascript.rb

RSpec.configure do |config|

  config.before :suite do
    DatabaseCleaner.strategy = :transaction
    DatabaseCleaner.clean_with :truncation
    Capybara.javascript_driver = :poltergeist
  end

  config.before :each do
    if example.metadata[:js]
      DatabaseCleaner.strategy = :truncation
    else
      DatabaseCleaner.strategy = :transaction
      DatabaseCleaner.start
    end
  end

  config.after :each do
    DatabaseCleaner.clean
  end

end

search_movie_spec.rb

require 'spec_helper'

describe 'search for a movie' do

  let(:tmdb_movie) { tmdb_result }

  it 'searches for the given title', js: true do
    visit new_movie_path
    page.should_not have_content('Star Wars Episode VII')
    fill_in 'title', with: 'Star Wars'
    page.should have_content('Star Wars Episode VII')
  end
end

spec_helper.rb

require 'capybara/rspec'
require 'capybara/rails'
require 'capybara/poltergeist'
require 'database_cleaner'

RSpec.configure do |config|
  config.use_transactional_fixtures = false
end