feature: add rails 5 support

Update gemspec and add appraisal for rails 5.

Appraisals

@@ -10,3 +10,8 @@ end
 appraise 'rails-41' do
   gem 'rails', '~> 4.1.1'
 end
+
+appraise 'rails-5' do
+  gem 'rails', '~> 5.0'
+  gem 'rails-controller-testing'
+end

fastly-rails.gemspec

@@ -14,7 +14,7 @@ Gem::Specification.new do |s|
   s.files = Dir["{app,config,db,lib}/**/*", "MIT-LICENSE", "Rakefile", "README.rdoc"]
   s.test_files = Dir["test/**/*"]
 
-  s.add_dependency "railties", '< 5'
+  s.add_dependency "railties", '> 2', '< 6'
   s.add_dependency 'fastly', '~> 1.6'
 
   s.add_runtime_dependency('mime-types', ['>= 1.16', '< 3'])

gemfiles/rails_5.gemfile

@@ -0,0 +1,8 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "rails", "~> 5.0"
+gem "rails-controller-testing"
+
+gemspec :path => "../"

test/test_helper.rb

@@ -9,6 +9,11 @@
 require 'factory_girl_rails'
 require 'webmock/minitest'
 
+begin
+  require 'rails-controller-testing'
+rescue LoadError
+end
+
 Rails.backtrace_cleaner.remove_silencers!
 
 #include factories