Rakefile in super_exception_notifier-3.0.16 vs Rakefile in super_exception_notifier-3.1.0

@@ -1,10 +1,9 @@
 #!/usr/bin/env rake
 require "bundler/gem_tasks"
 require 'rake'
 require 'rake/testtask'
-require 'rake/rdoctask'
 
 desc 'Default: run unit tests.'
 task :default => :test
 
 desc 'Test exception_notifiable gem.'
@@ -12,10 +11,20 @@
   t.libs << "test"
   t.test_files = FileList['test/*_test.rb']
   t.verbose = true
 end
 
+namespace :test do
+  desc 'Test against all supported Rails versions'
+  task :all do
+    %w(2.0.x 2.1.x 2.2.x 2.3.x).each do |version|
+      sh "BUNDLE_GEMFILE='gemfiles/Gemfile.rails-#{version}' bundle --quiet"
+      sh "BUNDLE_GEMFILE='gemfiles/Gemfile.rails-#{version}' bundle exec rake test"
+    end
+  end
+end
+
 require 'reek/rake/task'
 Reek::Rake::Task.new do |t|
   t.fail_on_error = true
   t.verbose = false
   t.source_files = 'lib/**/*.rb'
@@ -25,12 +34,15 @@
 require 'roodi_task'
 RoodiTask.new do |t|
   t.verbose = false
 end
 
+
 desc 'Generate documentation for exception_notifiable gem.'
 require File.expand_path('../lib/super_exception_notifier/version', __FILE__)
-Rake::RDocTask.new do |rdoc|
+require 'rdoc'
+require 'rdoc/task'
+RDoc::Task.new do |rdoc|
   rdoc.rdoc_dir = 'rdoc'
   rdoc.title    = "exception_notifiable #{SuperExceptionNotifier::VERSION}"
   rdoc.options << '--line-numbers' << '--inline-source'
   rdoc.rdoc_files.include('README.md')
   rdoc.rdoc_files.include('lib/**/*.rb')