Не знаю, не может найти генератор.
gem install rspec Fetching: rspec-core-2.8.0.gem (100%) Fetching: rspec-expectations-2.8.0.gem (100%) Fetching: rspec-mocks-2.8.0.gem (100%) Fetching: rspec-2.8.0.gem (100%) Successfully installed rspec-core-2.8.0 Successfully installed rspec-expectations-2.8.0 Successfully installed rspec-mocks-2.8.0 Successfully installed rspec-2.8.0 4 gems installed Installing ri documentation for rspec-core-2.8.0... Installing ri documentation for rspec-expectations-2.8.0... Installing ri documentation for rspec-mocks-2.8.0... Installing ri documentation for rspec-2.8.0... Installing RDoc documentation for rspec-core-2.8.0... Installing RDoc documentation for rspec-expectations-2.8.0... Installing RDoc documentation for rspec-mocks-2.8.0... Installing RDoc documentation for rspec-2.8.0... $bundle install ... Your bundle is complete! Use `bundle show [gemname]` to see where a bundled gem is installed. $ script/rails generate rspec:install Could not find generator rspec:install.
Я бы добавил следующее в ваш Gemfile, я думаю, что вы упускаете драгоценный камень rspec-rails.
group :development, :test do gem "rspec-rails" end