[Test] opal-rspec tests setup for running in both opal 0.8 & 0.9

Author: zetachang

.gitignore

@@ -33,3 +33,4 @@ spec/test_app
 Gemfile.lock
 
 /gemfiles/*.lock
+/tmp

config.ru

@@ -1,16 +1,32 @@
 require 'bundler'
 Bundler.require
 
-require "opal-rspec"
+require "opal/rspec"
 require "opal-jquery"
-#require "react/source"
 
-Opal.append_path File.expand_path('../spec', __FILE__)
+begin
+  require "react-rails"
+rescue NameError
+end
 
-run Opal::Server.new { |s|
-  s.main = 'opal/rspec/sprockets_runner'
-  s.append_path 'spec'
-  #s.append_path File.dirname(::React::Source.bundled_path_for("react-with-addons.js"))
-  s.debug = true
-  s.index_path = 'spec/index.html.erb'
-}
+if Opal::RSpec.const_defined?("SprocketsEnvironment")
+  sprockets_env = Opal::RSpec::SprocketsEnvironment.new
+  sprockets_env.cache = Sprockets::Cache::FileStore.new("tmp")
+  sprockets_env.add_spec_paths_to_sprockets
+  run Opal::Server.new(sprockets: sprockets_env) { |s|
+    s.main = 'opal/rspec/sprockets_runner'
+    s.append_path React::Rails::AssetVariant.new(addons: true).react_directory
+    s.debug = false
+    s.append_path 'spec/vendor'
+    s.index_path = 'spec/index.html.erb'
+  }
+else
+  run Opal::Server.new { |s|
+    s.main = 'opal/rspec/sprockets_runner'
+    s.append_path React::Rails::AssetVariant.new(addons: true).react_directory
+    s.append_path 'spec'
+    s.append_path 'spec/vendor'
+    s.debug = false
+    s.index_path = 'spec/index.html.erb'
+  }
+end