NameError: uninitialized constant when trying to execute rails tests
In a Rails 3.2.13 app I'm writing right now I have a model called Business. As this model was getting fatter and fatter, I decided to split it up in two, extracting all code related to availability into a Rails concern named Availability, stored at models/concerns/business
class Business
module Availability
extend ActiveSupport::Concern
AVAILABILITY_OPEN = 1
AVAILABILITY_CLOSED = -1
AVAILABILITY_COMPLETE = -2
...
As concerns are not enabled in Rails by default, I've put the following line in config/application.rb in order to autoload them:
config.autoload_paths += %W(#{config.root}/app/models/concerns)
The problem is that, after the split, all my tests have stopped working, returning a NameError: uninitialized constant Availability error. I suppose I need to require this concern somehow in my tests, but I haven't managed to do it yet, and I also don't understand why this concern is needed even in tests which doesn't make use of it.
The following is the stack trace returned after running the tests:
NameError: uninitialized constant Availability
(erb):9:in `<main>'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/erb.rb:849:in `eval'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/erb.rb:849:in `result'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.13/lib/active_record/fixtures/file.rb:51:in `render'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.13/lib/active_record/fixtures/file.rb:43:in `rows'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.13/lib/active_record/fixtures/file.rb:29:in `each'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:670:in `block (2 levels) in read_fixture_files'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.13/lib/active_record/fixtures/file.rb:20:in `open'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:669:in `block in read_fixture_files'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:668:in `each'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:668:in `read_fixture_files'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:548:in `initialize'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:482:in `new'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:482:in `block (2 levels) in create_fixtures'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:479:in `map'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:479:in `block in create_fixtures'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.13/lib/active_record/connection_adapters/abstract_mysql_adapter.rb:232:in `disable_referential_integrity'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:476:in `create_fixtures'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:895:in `load_fixtures'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activerecord-3.2.13/lib/active_record/fixtures.rb:849:in `setup_fixtures'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:407:in `_run__871072887135343583__setup__3260066542044458782__callbacks'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:405:in `__run_callback'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:385:in `_run_setup_callbacks'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-3.2.13/lib/active_support/callbacks.rb:81:in `run_callbacks'
/home/sergio/.rvm/gems/ruby-2.0.0-p247/gems/activesupport-3.2.13/lib/active_support/testing/setup_and_teardown.rb:35:in `run'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/minitest/unit.rb:919:in `block in _run_suite'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/minitest/unit.rb:912:in `map'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/minitest/unit.rb:912:in `_run_suite'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/test/unit.rb:657:in `block in _run_suites'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/test/unit.rb:655:in `each'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/test/unit.rb:655:in `_run_suites'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/minitest/unit.rb:867:in `_run_anything'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/minitest/unit.rb:1060:in `run_tests'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/minitest/unit.rb:1047:in `block in _run'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/minitest/unit.rb:1046:in `each'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/minitest/unit.rb:1046:in `_run'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/minitest/unit.rb:1035:in `run'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/test/unit.rb:21:in `run'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/test/unit.rb:774:in `run'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/test/unit.rb:366:in `block (2 levels) in autorun'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/test/unit.rb:27:in `run_once'
/home/sergio/.rvm/rubies/ruby-2.0.0-p247/lib/ruby/2.0.0/test/unit.rb:365:in `block in autorun'
UPDATE
This is an excerpt of the class Business, which includes the Availability concern:
class Business < ActiveRecord::Base
include Availability
include EmailVirtualAttribute
include TelephoneVirtualAttribute
belongs_to :place
has_many :businesses_users
has_many :users, :through => :businesses_users, :uniq => true
has_many :customers, :inverse_of => :business, :dependent => :destroy
has_many :emails, :as => :contactable, :class_name => 'Email'
has_many :telephones, :as => :contactable, :class_name => 'Telephone'
...
The development/test configs are the standard ones, no changes have been made
test.rb
Rendezvous::Application.configure do
# Settings specified here will take precedence over those in config/application.rb
# The test environment is used exclusively to run your application's
# test suite. You never need to work with it otherwise. Remember that
# your test database is "scratch space" for the test suite and is wiped
# and recreated between test runs. Don't rely on the data there!
config.cache_classes = true
# Configure static asset server for tests with Cache-Control for performance
config.serve_static_assets = true
config.static_cache_control = "public, max-age=3600"
# Log error messages when you accidentally call methods on nil
config.whiny_nils = true
# Show full error reports and disable caching
config.consider_all_requests_local = true
config.action_controller.perform_caching = false
# Raise exceptions instead of rendering exception templates
config.action_dispatch.show_exceptions = false
# Disable request forgery protection in test environment
config.action_controller.allow_forgery_protection = false
# Tell Action Mailer not to deliver emails to the real world.
# The :test delivery method accumulates sent emails in the
# ActionMailer::Base.deliveries array.
config.action_mailer.delivery_method = :test
# Raise exception on mass assignment protection for Active Record models
config.active_record.mass_assignment_sanitizer = :strict
# Print deprecation notices to the stderr
config.active_support.deprecation = :stderr
end
development.rb
Rendezvous::Application.configure do
# Settings specified here will take precedence over those in config/application.rb
# In the development environment your application's code is reloaded on
# every request. This slows down response time but is perfect for development
# since you don't have to restart the web server when you make code changes.
config.cache_classes = false
# Log error messages when you accidentally call methods on nil.
config.whiny_nils = true
# Show full error reports and disable caching
config.consider_all_requests_local = true
config.action_controller.perform_caching = false
# Don't care if the mailer can't send
config.action_mailer.raise_delivery_errors = false
# Print deprecation notices to the Rails logger
config.active_support.deprecation = :log
# Only use best-standards-support built into browsers
config.action_dispatch.best_standards_support = :builtin
# Raise exception on mass assignment protection for Active Record models
config.active_record.mass_assignment_sanitizer = :strict
# Log the query plan for queries taking more than this (works
# with SQLite, MySQL, and PostgreSQL)
config.active_record.auto_explain_threshold_in_seconds = 0.5
# Do not compress assets
config.assets.compress = false
# Expands the lines which load the assets
config.assets.debug = true
end
UPDATE 2
It seems that the errors that happen when executing the tests are caused by the fixtures. If I comment the fixtures :all loading on test_helper.rb and create a simple test that just asserts true, this test pass, but it doesn't when the fixtures are loaded.
Answer
Finally I found the reason why all my tests failed with an error. I was referencing to a constant declared in the Availability concern using Availabiliy:: , instead of using Business::. Also, my tests were not in sync with the current code, which made finding the bug a lot more difficult than it should. Replacing all the references to Availability with Business solved the problem. The lesson here is: keep always application and testing code in sync.
Thank you to Lichtamberg for all his kind support.