Spork and cache_classes problem with rspec, factory_girl and datamapper

Question

I've got a problem with Spork test server.

If I set config.cache_classes = false in config/environments/test.rb then specs start to rasie errors.

Failure/Error: task = Factory(:something, :foo => @foo, :bar => @bar)
     DataMapper::ImmutableError:
       Immutable resource cannot be modified

This is my spec_helper.rb:

require 'spork'

Spork.prefork do
  if ENV['CODE_COVERAGE'] == '1'
    require 'simplecov'
    SimpleCov.start 'rails'
  end

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

  Dir[Rails.root.join("spec/controllers/shared/*.rb")].each { |f| require f }
  Dir[Rails.root.join("spec/support/**/*.rb")].each { |f| require f }

  RSpec.configure do |config|
    config.mock_with :mocha
    config.include Rails.application.routes.url_helpers
    config.include UrlHelper

    config.before(:each) do
      repository(:default) do
        transaction = DataMapper::Transaction.new(repository)
        transaction.begin
        repository.adapter.push_transaction(transaction)
      end
    end

    config.after(:each) do
      repository(:default).adapter.pop_transaction.try(:rollback)
    end

  end
end

# This code will be run each time you run your specs.
Spork.each_run do
  # reload factories
  Factory.definition_file_paths = Dir[File.join(Rails.root, "spec", "factories")]
  Factory.find_definitions

  DatabaseCleaner.strategy = :truncation
  DatabaseCleaner.clean
  LoggedEvent.all.destroy!

end

When I have config.cache_classes = true, then everything works well, but It not reload me a models, controllers classes, so I don't see a point in using spork in this case.

I tried to add to spec_helper.rb something like this, when cache is true:

Spork.each_run do
    Dir.glob("#{Rails.root}/app/models/*.rb").sort.each { |file| load file }
end

But I don't like this solution.

Answer 1

Just add:

ActiveSupport::Dependencies.clear

to the end of the prefork block. this will take care of clearing the models.

Also, you want to move that rspec configure inclusions to Spork.each_run, same goes with requiring spec support and shared files.

This works, I use this setup in 2 projects w/o any troubles.

Answer 2

Try ActionDispatch::Reloader

In addition to setting config.cache_classes = false in config/environments/test.rb, the following seems to make DataMapper and Spork play nicely for our team:

Spork.each_run do

  # Routes
  MyApp::Application.reload_routes!

  if Spork.using_spork?
    # Reload all app files
    ActionDispatch::Reloader.cleanup!
    ActionDispatch::Reloader.prepare!

    # All factories
    FactoryGirl.reload
  end

end