feat(renderer) fix asset test

Author: rmosolgo

test/react_test.rb

@@ -1,26 +1,34 @@
 require 'test_helper'
-require 'fileutils'
-
 class ReactTest < ActionDispatch::IntegrationTest
   setup do
-    Rails.application.assets.send(:expire_index!)
+    FileUtils.rm_r(CACHE_PATH) if CACHE_PATH.exist?
+
+  end
+
+  teardown do
     FileUtils.rm_r(CACHE_PATH) if CACHE_PATH.exist?
   end
 
   test 'asset pipeline should deliver drop-in react file replacement' do
     app_react_file_path = File.expand_path("../dummy/vendor/assets/javascripts/react.js",  __FILE__)
-
-    react_file_token = "'test_confirmation_token_react_content_non_production';\n";
+    react_file_token = "'test_confirmation_token_react_content_non_production';\n"
     File.write(app_react_file_path, react_file_token)
 
-    asset_pipeline_length = Rails.application.assets.find_asset('react').to_s.length
+    react_asset = Rails.application.assets['react.js']
+
+    # Sprockets 2 doesn't expire this asset correctly,
+    # so override `fresh?` to mark it as expired.
+    def react_asset.fresh?(env); false; end
+
+    react_asset = Rails.application.assets['react.js']
+
     get '/assets/react.js'
 
     File.unlink(app_react_file_path)
-    FileUtils.rm_r CACHE_PATH if CACHE_PATH.exist?
+    FileUtils.rm_r(CACHE_PATH) if CACHE_PATH.exist?
 
     assert_response :success
-    assert_equal react_file_token.length, asset_pipeline_length, "The asset pipeline serves the drop-in file"
+    assert_equal react_file_token.length, react_asset.to_s.length, "The asset pipeline serves the drop-in file"
     assert_equal react_file_token.length, @response.body.length, "The asset route serves the drop-in file"
   end