Add Apprails for testing multiple versions.

.gitignore

@@ -2,3 +2,4 @@
 .bundle
 pkg/*
 Gemfile.lock
+gemfiles/*.lock

Appraisals

@@ -0,0 +1,11 @@
+appraise "rails-5" do
+  gem "rails", "5.0.0.beta1"
+end
+
+appraise "rails-4-2" do
+  gem "rails", "4.2.5"
+end
+
+appraise "rails-4-1" do
+  gem "rails", "4.1.14"
+end

Rakefile

@@ -1,5 +1,7 @@
+require "rubygems"
+require "bundler/setup"
 require "bundler/gem_tasks"
-require 'rake/testtask'
+require "rake/testtask"
 
 Rake::TestTask.new do |t|
   t.libs << 'test'

gemfiles/rails_4_1.gemfile

@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "http://rubygems.org"
+
+gem "rails", "4.1.14"
+
+gemspec :path => "../"

gemfiles/rails_4_2.gemfile

@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "http://rubygems.org"
+
+gem "rails", "4.2.5"
+
+gemspec :path => "../"

gemfiles/rails_5.gemfile

@@ -0,0 +1,7 @@
+# This file was generated by Appraisal
+
+source "http://rubygems.org"
+
+gem "rails", "5.0.0.beta1"
+
+gemspec :path => "../"

handlebars_assets.gemspec

@@ -28,7 +28,8 @@ Gem::Specification.new do |s|
   s.add_development_dependency "haml", '~> 4.0'
   s.add_development_dependency "rake", '~> 10.0'
   s.add_development_dependency "slim", '~> 3.0'
-  s.add_development_dependency 'json', '~> 1.7'
+  s.add_development_dependency "json", '~> 1.7'
+  s.add_development_dependency "appraisal"
 
   s.post_install_message = "Remember to rake assets:clean or rake assets:purge on update! this is required because of handlebars updates"
 end