Add Rails 5 support

Run test suite against the latest `5.0.0.betaX` and `master` branches of
[`rails/rails`][rails].

Since `EmberController` extends `ApplicationController`, which can now
extend from either `ActionController::Base` (which implements
`helper_method`) and `ActionController::API` (which doesn't implement
`helper_method`), we can't depend on that API existing.

Remove call to `helper_method` from `EmberController`, as it is no
longer supported.

Closes [#376].

[#376]: #376
[rails]: https://github.com/rails/rails

.travis.yml

@@ -19,3 +19,5 @@ gemfile:
   - gemfiles/3.2.gemfile
   - gemfiles/4.1.gemfile
   - gemfiles/4.2.gemfile
+  - gemfiles/5.0.0.beta2.gemfile
+  - gemfiles/master.gemfile

Appraisals

@@ -9,3 +9,11 @@ end
 appraise "4.2" do
   gem "rails", "~> 4.2.1"
 end
+
+appraise "5.0.0.beta2" do
+  gem "rails", "5.0.0.beta2"
+end
+
+appraise "master" do
+  gem "rails", git: "https://github.com/rails/rails.git", branch: "master"
+end

Gemfile

@@ -8,7 +8,7 @@ gem "pry"
 
 group :development, :test do
   gem "high_voltage", "~> 2.4.0"
-  gem "rspec-rails", "~> 3.3.0"
+  gem "rspec-rails", "~> 3.4.0"
 end
 
 group :test do

app/controller/ember_cli/ember_controller.rb

@@ -3,10 +3,5 @@ class EmberController < ::ApplicationController
     def index
       render layout: false
     end
-
-    def ember_app
-      params[:ember_app]
-    end
-    helper_method :ember_app
   end
 end

app/views/ember_cli/ember/index.html.erb

@@ -1,4 +1,4 @@
-<%= render_ember_app ember_app do |head| %>
+<%= render_ember_app params[:ember_app] do |head| %>
   <% head.append do %>
     <%= csrf_meta_tags %>
   <% end %>

gemfiles/3.2.gemfile

@@ -3,13 +3,12 @@
 source "https://rubygems.org"
 
 gem "appraisal"
-gem "test-unit", "~> 3.0"
 gem "rails", :git => "https://github.com/rails/rails.git", :branch => "3-2-stable"
 gem "pry"
 
 group :development, :test do
   gem "high_voltage", "~> 2.4.0"
-  gem "rspec-rails", "~> 3.3.0"
+  gem "rspec-rails", "~> 3.4.0"
 end
 
 group :test do

gemfiles/4.1.gemfile

@@ -8,7 +8,7 @@ gem "pry"
 
 group :development, :test do
   gem "high_voltage", "~> 2.4.0"
-  gem "rspec-rails", "~> 3.3.0"
+  gem "rspec-rails", "~> 3.4.0"
 end
 
 group :test do

gemfiles/4.2.gemfile

@@ -8,7 +8,7 @@ gem "pry"
 
 group :development, :test do
   gem "high_voltage", "~> 2.4.0"
-  gem "rspec-rails", "~> 3.3.0"
+  gem "rspec-rails", "~> 3.4.0"
 end
 
 group :test do

gemfiles/5.0.0.beta2.gemfile

@@ -0,0 +1,23 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal"
+gem "rails", "5.0.0.beta2"
+gem "pry"
+
+group :development, :test do
+  gem "high_voltage", github: "thoughtbot/high_voltage"
+  gem "rspec-core", github: "rspec/rspec-core"
+  gem "rspec-support", github: "rspec/rspec-support"
+  gem "rspec-expectations", github: "rspec/rspec-expectations"
+  gem "rspec-mocks", github: "rspec/rspec-mocks"
+  gem "rspec-rails", github: "rspec/rspec-rails"
+end
+
+group :test do
+  gem "poltergeist", "~> 1.8.0"
+  gem "codeclimate-test-reporter", :require => nil
+end
+
+gemspec :path => "../"

gemfiles/master.gemfile

@@ -0,0 +1,23 @@
+# This file was generated by Appraisal
+
+source "https://rubygems.org"
+
+gem "appraisal"
+gem "rails", :git => "https://github.com/rails/rails.git", :branch => "master"
+gem "pry"
+
+group :development, :test do
+  gem "high_voltage", github: "thoughtbot/high_voltage"
+  gem "rspec-core", github: "rspec/rspec-core"
+  gem "rspec-support", github: "rspec/rspec-support"
+  gem "rspec-expectations", github: "rspec/rspec-expectations"
+  gem "rspec-mocks", github: "rspec/rspec-mocks"
+  gem "rspec-rails", github: "rspec/rspec-rails"
+end
+
+group :test do
+  gem "poltergeist", "~> 1.8.0"
+  gem "codeclimate-test-reporter", :require => nil
+end
+
+gemspec :path => "../"