"requiert": impossible de charger le fichier — capybara/rspec (LoadError)

J'ai essayé de tester mon projet. Il travaillait avant et je ne sais pas ce que j'ai fait à chaque fois que je tape bundle exec rspec spec/ il dit cannot load such file -- capybara/rspec (LoadError). Et s'il vous Plaît j'ai besoin d'un avis laquelle est la bonne pour tester mon MVC dans ruby on rails comme un débutant.

Gemfile:
------------

group :test do
  # Pretty printed test output
  gem 'turn', :require => false
  gem 'minitest'
  gem 'capybara', '1.1.2'
  gem 'rb-inotify', '0.8.8'
  gem 'libnotify', '0.5.9'
  gem 'guard-spork', '0.3.2'
  gem 'spork', '0.9.0'
  gem 'spork-testunit'
  gem 'guard-test'
  gem 'ruby-prof'
  gem 'factory_girl_rails', '1.4.0' 
  if RUBY_PLATFORM =~ /linux/
    gem 'capybara-webkit'
  end
  gem 'launchy'
end

group :development, :test do
  gem 'rspec-rails', '2.10.0'
  gem 'guard-rspec', '0.5.5'
end

spec_helper.rb:

require 'rubygems'
#require 'factory_girl'
#uncomment the following line to use spork with the debugger
#require 'spork/ext/ruby-debug'


  ENV["RAILS_ENV"] ||= 'test'
  require File.expand_path("../../config/environment", __FILE__)
  require 'rspec/rails'
  require 'rspec/autorun'
  require 'capybara/rspec'
  require 'capybara/rails'

  # Requires supporting ruby files with custom matchers and macros, etc,
  # in spec/support/and its subdirectories.
  Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}

  RSpec.configure do |config|
  # ## Mock Framework
  #
  # If you prefer to use mocha, flexmock or RR, uncomment the appropriate line:
  #
  # config.mock_with :mocha
  # config.mock_with :flexmock
  # config.mock_with :rr
  config.mock_with :rspec

  # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
  config.fixture_path = "#{::Rails.root}/spec/fixtures"

  # If you're not using ActiveRecord, or you'd prefer not to run each of your
  # examples within a transaction, remove the following line or assign false
  # instead of true.
  config.use_transactional_fixtures = false

  # If true, the base class of anonymous controllers will be inferred
  # automatically. This will be the default behavior in future versions of
  # rspec-rails.
  config.infer_base_class_for_anonymous_controllers = false

  #Capybara.default_driver = :selenium
  Capybara.javascript_driver = :webkit
end

Erreur:

/home/IN4SYSTEMS/sri.kalai/Desktop/gems/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require': cannot load such file -- capybara/rspec (LoadError)
        from /home/IN4SYSTEMS/sri.kalai/Desktop/gems/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `block in require'
        from /home/IN4SYSTEMS/sri.kalai/Desktop/gems/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:236:in `load_dependency'
        from /home/IN4SYSTEMS/sri.kalai/Desktop/gems/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require'
        from /home/IN4SYSTEMS/sri.kalai/Documents/promaster/spec/spec_helper.rb:11:in `<top (required)>'
        from /home/IN4SYSTEMS/sri.kalai/Documents/promaster/spec/helpers/loc/epcs_helper_spec.rb:1:in `require'
        from /home/IN4SYSTEMS/sri.kalai/Documents/promaster/spec/helpers/loc/epcs_helper_spec.rb:1:in `<top (required)>'
        from /home/IN4SYSTEMS/sri.kalai/Desktop/gems/ruby/1.9.1/gems/rspec-core-2.10.1/lib/rspec/core/configuration.rb:746:in `load'
        from /home/IN4SYSTEMS/sri.kalai/Desktop/gems/ruby/1.9.1/gems/rspec-core-2.10.1/lib/rspec/core/configuration.rb:746:in `block in load_spec_files'
        from /home/IN4SYSTEMS/sri.kalai/Desktop/gems/ruby/1.9.1/gems/rspec-core-2.10.1/lib/rspec/core/configuration.rb:746:in `map'
        from /home/IN4SYSTEMS/sri.kalai/Desktop/gems/ruby/1.9.1/gems/rspec-core-2.10.1/lib/rspec/core/configuration.rb:746:in `load_spec_files'
        from /home/IN4SYSTEMS/sri.kalai/Desktop/gems/ruby/1.9.1/gems/rspec-core-2.10.1/lib/rspec/core/command_line.rb:22:in `run'
        from /home/IN4SYSTEMS/sri.kalai/Desktop/gems/ruby/1.9.1/gems/rspec-core-2.10.1/lib/rspec/core/runner.rb:66:in `rescue in run'
        from /home/IN4SYSTEMS/sri.kalai/Desktop/gems/ruby/1.9.1/gems/rspec-core-2.10.1/lib/rspec/core/runner.rb:62:in `run'
        from /home/IN4SYSTEMS/sri.kalai/Desktop/gems/ruby/1.9.1/gems/rspec-core-2.10.1/lib/rspec/core/runner.rb:10:in `block in autorun'

Merci d'avance!!!

OriginalL'auteur Sri | 2012-11-27