Use spork to run spec tests.

Spork initialises rails once and thereafter uses that copy of rails to
run spec tests, leading to much faster test runs. On my machine, testing
index.html.haml takes 2s instead of 7s after this change, and `rake`
takes ~9s instead of ~18s.

Instructions once again taken from
http://www.rubyinside.com/how-to-rails-3-and-rspec-2-4336.html, though I
didn't copy any code for this commit.

.rspec

@@ -1 +1 @@
---color
+--color --drb

Gemfile

@@ -52,4 +52,5 @@ group :development, :test do
   gem 'rspec-rails'
   gem 'webrat'
   gem 'watchr'
+  gem 'spork', '~> 0.9.0.rc'
 end

Gemfile.lock

@@ -108,6 +108,7 @@ GEM
       railties (~> 3.2.0)
       sass (>= 3.1.10)
       tilt (~> 1.3)
+    spork (0.9.2)
     sprockets (2.1.3)
       hike (~> 1.2)
       rack (~> 1.0)
@@ -144,6 +145,7 @@ DEPENDENCIES
   rails (= 3.2.8)
   rspec-rails
   sass-rails (~> 3.2.3)
+  spork (~> 0.9.0.rc)
   sqlite3
   therubyracer
   uglifier (>= 1.0.3)

config/environments/test.rb

@@ -5,7 +5,9 @@ Growstuff::Application.configure do
   # 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
+
+  # Reload model classes when changed: otherwise Spork tests old versions.
+  config.cache_classes = false
 
   # Configure static asset server for tests with Cache-Control for performance
   config.serve_static_assets = true

spec/spec_helper.rb

@@ -1,39 +1,84 @@
-# This file is copied to spec/ when you run 'rails generate rspec:install'
-ENV["RAILS_ENV"] ||= 'test'
-require File.expand_path("../../config/environment", __FILE__)
-require 'rspec/rails'
-require 'rspec/autorun'
+require 'spork'
+#uncomment the following line to use spork with the debugger
+#require 'spork/ext/ruby-debug'
 
-# Requires supporting ruby files with custom matchers and macros, etc,
-# in spec/support/ and its subdirectories.
-Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}
+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.
 
-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
+  # This file is copied to spec/ when you run 'rails generate rspec:install'
+  ENV["RAILS_ENV"] ||= 'test'
+  require File.expand_path("../../config/environment", __FILE__)
+  require 'rspec/rails'
+  require 'rspec/autorun'
 
-  # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
-  config.fixture_path = "#{::Rails.root}/spec/fixtures"
+  # Requires supporting ruby files with custom matchers and macros, etc,
+  # in spec/support/ and its subdirectories.
+  Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}
 
-  # If you're not using ActiveRecord, or you'd prefer not to run each of your
-  # examples within a transaction, remove the following line or assign false
-  # instead of true.
-  config.use_transactional_fixtures = true
+  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
 
-  # If true, the base class of anonymous controllers will be inferred
-  # automatically. This will be the default behavior in future versions of
-  # rspec-rails.
-  config.infer_base_class_for_anonymous_controllers = false
+    # Remove this line if you're not using ActiveRecord or ActiveRecord fixtures
+    config.fixture_path = "#{::Rails.root}/spec/fixtures"
 
-  # Run specs in random order to surface order dependencies. If you find an
-  # order dependency and want to debug it, you can fix the order by providing
-  # the seed, which is printed after each run.
-  #     --seed 1234
-  config.order = "random"
+    # If you're not using ActiveRecord, or you'd prefer not to run each of your
+    # examples within a transaction, remove the following line or assign false
+    # instead of true.
+    config.use_transactional_fixtures = true
+
+    # If true, the base class of anonymous controllers will be inferred
+    # automatically. This will be the default behavior in future versions of
+    # rspec-rails.
+    config.infer_base_class_for_anonymous_controllers = false
+
+    # Run specs in random order to surface order dependencies. If you find an
+    # order dependency and want to debug it, you can fix the order by providing
+    # the seed, which is printed after each run.
+    #     --seed 1234
+    config.order = "random"
+
+  end
+end
+
+Spork.each_run do
+  # This code will be run each time you run your specs.
 
 end
+
+# --- Instructions ---
+# The Spork.prefork block is run only once when the spork server is started.
+# You typically want to place most of your (slow) initializer code in here, in
+# particular, require'ing any 3rd-party gems that you don't normally modify
+# during development.
+#
+# The Spork.each_run block is run each time you run your specs.  In case you
+# need to load files that tend to change during development, require them here.
+# With Rails, your application modules are loaded automatically, so sometimes
+# this block can remain empty.
+#
+# Note: You can modify files loaded *from* the Spork.each_run block without
+# restarting the spork server.  However, this file itself will not be reloaded,
+# so if you change any of the code inside the each_run block, you still need to
+# restart the server.  In general, if you have non-trivial code in this file,
+# it's advisable to move it into a separate file so you can easily edit it
+# without restarting spork.  (For example, with RSpec, you could move
+# non-trivial code into a file spec/support/my_helper.rb, making sure that the
+# spec/support/* files are require'd from inside the each_run block.)
+#
+# Any code that is left outside the two blocks will be run during preforking
+# *and* during each_run -- that's probably not what you want.
+#
+# These instructions should self-destruct in 10 seconds.  If they don't, feel
+# free to delete them.
+
+
+
+