NameError: uninitialized constant in Rails app when testing with RSpec and Spork

ruby-on-rails rspec2 spork
Rich picture Rich · Dec 18, 2010 · Viewed 8.6k times · Source

I am trying to run my tests in my first Rails app using the following command in Terminal:

rspec spec/

But it is only resulting in the following error(s):

Exception encountered: #<NameError: uninitialized constant PagesController>
backtrace:
/Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/rspec-core-2.3.0/lib/rspec/core/backward_compatibility.rb:20:in `const_missing'
/Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/rspec-expectations-2.3.0/lib/rspec/expectations/backward_compatibility.rb:6:in `const_missing'
/Users/rich/dev/rails_projects/abunchofletters/spec/controllers/pages_controller_spec.rb:3:in `<top (required)>'
/Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/rspec-core-2.3.0/lib/rspec/core/configuration.rb:388:in `block in load_spec_files'
/Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/rspec-core-2.3.0/lib/rspec/core/configuration.rb:388:in `map'
/Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/rspec-core-2.3.0/lib/rspec/core/configuration.rb:388:in `load_spec_files'
/Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/rspec-core-2.3.0/lib/rspec/core/command_line.rb:18:in `run'
/Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/rspec-core-2.3.0/lib/rspec/monkey/spork/test_framework/rspec.rb:4:in `run_tests'
/Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/spork-0.9.0.rc2/lib/spork/run_strategy/forking.rb:13:in `block in run'
/Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/spork-0.9.0.rc2/lib/spork/forker.rb:21:in `block in initialize'
/Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/spork-0.9.0.rc2/lib/spork/forker.rb:18:in `fork'
/Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/spork-0.9.0.rc2/lib/spork/forker.rb:18:in `initialize'
/Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/spork-0.9.0.rc2/lib/spork/run_strategy/forking.rb:9:in `new'
/Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/spork-0.9.0.rc2/lib/spork/run_strategy/forking.rb:9:in `run'
/Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/spork-0.9.0.rc2/lib/spork/server.rb:47:in `run'
/Users/rich/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/drb/drb.rb:1558:in `perform_without_block'
/Users/rich/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/drb/drb.rb:1518:in `perform'
/Users/rich/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/drb/drb.rb:1592:in `block (2 levels) in main_loop'
/Users/rich/.rvm/rubies/ruby-1.9.2-p0/lib/ruby/1.9.1/drb/drb.rb:1588:in `loop'

I can run the site successfully in the browser, and "Spork is ready and listening", which makes me think there is a problem with the Gems I'm running, RSpec, Spork or... something? Rather than the tests I've written as the PagesController and RSpec test were based on the RailsTutorial.org book. I am at a loss.

Here's my Gemfile:

source 'http://rubygems.org'

gem 'rails', '3.0.3'
gem 'sqlite3-ruby', '1.2.5', :require => 'sqlite3'
gem 'gravatar_image_tag', '0.1.0'
gem "nokogiri", '1.4.4'
gem 'will_paginate', '3.0.pre2'

group :development do
  gem 'rspec-rails', '2.3.0'
  gem 'annotate-models', '1.0.4'
  gem 'faker', '0.3.1'
end

group :test do
  gem 'rspec', '2.3.0'
  gem 'webrat', '0.7.1'
  gem 'spork', '0.9.0.rc2'
  gem 'factory_girl_rails', '1.0'
end

Followed by my local gems list:

abstract (1.0.0)
actionmailer (3.0.3)
actionpack (3.0.3)
activemodel (3.0.3)
activerecord (3.0.3)
activeresource (3.0.3)
activesupport (3.0.3)
annotate-models (1.0.4)
arel (2.0.6)
autotest (4.3.2)
autotest-fsevent (0.2.2)
autotest-growl (0.2.4)
autotest-rails-pure (4.1.0)
builder (2.1.2)
bundler (1.0.3)
diff-lcs (1.1.2)
erubis (2.6.6)
factory_girl (1.3.2)
factory_girl_rails (1.0)
faker (0.3.1)
gravatar_image_tag (0.1.0)
i18n (0.5.0)
mail (2.2.12)
mime-types (1.16)
nokogiri (1.4.4)
polyglot (0.3.1)
rack (1.2.1)
rack-mount (0.6.13)
rack-test (0.5.6)
rails (3.0.3)
railties (3.0.3)
rake (0.8.7)
rdoc (2.5.11)
rspec (2.3.0)
rspec-core (2.3.0)
rspec-expectations (2.3.0)
rspec-mocks (2.3.0)
rspec-rails (2.3.0)
spork (0.9.0.rc2)
sqlite3-ruby (1.2.5)
sys-uname (0.8.4)
thor (0.14.6)
treetop (1.4.9)
tzinfo (0.3.23)
webrat (0.7.1)
will_paginate (3.0.pre2)

Does anyone have any ideas or can I help by providing more information? I'm a Rails novice coming back to it every now and then seem to encounter problems before giving up again...

Update My Spec/spec_helper.rb file:

require 'rubygems'
require 'spork'

Spork.prefork do
  # Loading more in this block will cause your tests to run faster. However, 
  # if you change any configuration or code from libraries loaded here, you'll
  # need to restart spork for it take effect.
  ENV["RAILS_ENV"] ||= 'test'
  unless defined?(Rails)
    require File.dirname(__FILE__) + "/../config/environment"
  end
  require 'rspec/rails'

  # Requires supporting files with custom matchers and macros, etc,
  # in ./support/ and its subdirectories.
  Dir["#{File.dirname(__FILE__)}/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

    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, comment the following line or assign false
    # instead of true.
    config.use_transactional_fixtures = true

    ### Part of a Spork hack. See http://bit.ly/arY19y
    # Emulate initializer set_clear_dependencies_hook in 
    # railties/lib/rails/application/bootstrap.rb
    ActiveSupport::Dependencies.clear
  end
end

Spork.each_run do
end

And here is the output from Terminal when the contents of spec_helper are removed:

No DRb server is running. Running in local process instead ...
/Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/rspec-core-2.3.0/lib/rspec/core/backward_compatibility.rb:20:in `const_missing': uninitialized constant Object::PagesController (NameError)
    from /Users/rich/dev/rails_projects/abunchofletters/spec/controllers/pages_controller_spec.rb:3:in `<top (required)>'
    from /Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/rspec-core-2.3.0/lib/rspec/core/configuration.rb:388:in `load'
    from /Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/rspec-core-2.3.0/lib/rspec/core/configuration.rb:388:in `block in load_spec_files'
    from /Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/rspec-core-2.3.0/lib/rspec/core/configuration.rb:388:in `map'
    from /Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/rspec-core-2.3.0/lib/rspec/core/configuration.rb:388:in `load_spec_files'
    from /Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/rspec-core-2.3.0/lib/rspec/core/command_line.rb:18:in `run'
    from /Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/rspec-core-2.3.0/lib/rspec/core/runner.rb:55:in `run_in_process'
    from /Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/rspec-core-2.3.0/lib/rspec/core/runner.rb:44:in `run'
    from /Users/rich/.rvm/gems/ruby-1.9.2-p0@abunchofletters/gems/rspec-core-2.3.0/lib/rspec/core/runner.rb:10:in `block in autorun'

Answer

Rich picture Rich · Dec 20, 2010

It turned out that the problem was caused by a bad validation rule in a different model. It took a lot of random thoughts and attempts but got there in the end without much help from the error message.

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