Rakefile in simple-navigation-4.0.3 vs Rakefile in simple-navigation-4.0.4

@@ -1,11 +1,34 @@
-require 'bundler/gem_tasks'
+require 'bundler'
+Bundler::GemHelper.install_tasks
+
+require 'rspec/core'
 require 'rspec/core/rake_task'
+
 require 'rdoc/task'
 
 RSpec::Core::RakeTask.new(:spec)
 
-task default: :spec
+task default: 'spec:all'
+
+namespace :spec do
+  mappers = %w[
+    rails-3-2-stable
+    rails-4-1-stable
+    rails-4-2-stable
+  ]
+
+  mappers.each do |gemfile|
+    desc "Run Tests against #{gemfile}"
+    task gemfile do
+      sh "BUNDLE_GEMFILE='gemfiles/#{gemfile}.gemfile' bundle -j 4 --quiet"
+      sh "BUNDLE_GEMFILE='gemfiles/#{gemfile}.gemfile' bundle exec rake -t spec"
+    end
+  end
+
+  desc 'Run Tests against all ORMs'
+  task all: mappers
+end
 
 RDoc::Task.new do |rdoc|
   rdoc.rdoc_dir = 'rdoc'
   rdoc.title    = 'SimpleNavigation'
   rdoc.options << '--inline-source'