Rails 3 + Heroku: cannot load such file -- test/unit/testcase (LoadError)

Question

I'm having the following error when running the console in heroku (heroku run console...). The application is running without problems, but I seem to be unable to run the console because of this and in development I'm not having this issue.

/app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require': cannot load such file -- test/unit/testcase (LoadError) from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `block in require' from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:236:in `load_dependency' from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require' from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/test_case.rb:1:in `<top (required)>' from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require' from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `block in require' from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:236:in `load_dependency' from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require' from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/console/app.rb:2:in `<top (required)>' from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require' from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `block in require' from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:236:in `load_dependency' from /app/vendor/bundle/ruby/1.9.1/gems/activesupport-3.2.9/lib/active_support/dependencies.rb:251:in `require' from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/application.rb:304:in `initialize_console' from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/application.rb:152:in `load_console' from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/commands/console.rb:27:in `start' from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/commands/console.rb:8:in `start' from /app/vendor/bundle/ruby/1.9.1/gems/railties-3.2.9/lib/rails/commands.rb:41:in `<top (required)>' from script/rails:6:in `require' from script/rails:6:in `<main>' 

This is my Gemfile:

source 'http://rubygems.org' ruby '1.9.3'  gem 'rails', '3.2.9'  gem 'oauth', '~> 0.4.4' gem 'twitter', '~> 1.4.1' gem 'sendgrid' gem 'koala'  gem 'therubyracer', '0.10.2' gem 'execjs'  # Rails 3.1 - Asset Pipeline gem 'json'  group :assets do   gem 'sass-rails', "  >= 3.2.3"   gem 'coffee-rails', ">= 3.2.1"   gem 'uglifier', '>= 1.0.3'   gem 'bootstrap-sass' end  gem 'coffee-script'  gem 'jquery-rails'  gem "fog" gem 'bootstrap-wysihtml5-rails', '0.3.1.10'  group :production do   gem "heroku"   gem 'pg', '0.13'   gem 'newrelic_rpm'   gem 'newrelic_api' end  group :test do   gem 'email_spec'   gem "cucumber-rails"   gem "rspec-rails"   gem "capybara"   gem 'culerity'   gem "selenium-webdriver"   gem "database_cleaner"   gem 'factory_girl_rails' end  group :development, :grades, :test do   gem "launchy"   gem "mysql2"   gem "letter_opener"   gem "pry"   gem "rails-erd" end  gem "airbrake" gem "authlogic" gem 'awesome_print' gem 'cancan' gem 'dalli'  #gem "oink" gem 'validates_timeliness', '~> 3.0.2' gem 'hpricot' gem "ruby_parser" gem "prawn_rails" gem "thin" gem "nested_form", :git => "git://github.com/ryanb/nested_form.git" gem "meta_search" gem "carrierwave" gem "aws-s3" gem "mini_magick" gem 'will_paginate' gem "spreadsheet" gem "oauth-plugin", ">= 0.4.0.pre1" gem 'flash_cookie_session' gem 'haml-rails' gem 'squeel' gem 'rails_best_practices', :group => :development gem 'simple_form' gem 'taps', :group => :development gem 'resque' gem "audited-activerecord", "~> 3.0" gem "lograge" gem 'quiet_assets' gem 'yajl-ruby', :require => "yajl" gem 'switch_user' 

I've got no idea why I'm getting this error. Any thoughts? Thanks

Answer 1

With Rails 3.1.12 and Ruby 2.2.0 I had to add

gem 'test-unit' 

to my Gemfile.

Answer 2

Removing test in the .slugignore file works for me.