1 files changed, 35 insertions, 1 deletions
diff --git a/actioncable/Rakefile b/actioncable/Rakefile
index 87d443919c..bda8c7b6c8 100644
--- a/actioncable/Rakefile
+++ b/actioncable/Rakefile
@@ -1,12 +1,13 @@
 require "rake/testtask"
 require "pathname"
+require "open3"
 require "action_cable"
 
 dir = File.dirname(__FILE__)
 
 task default: :test
 
-task package: "assets:compile"
+task package: %w( assets:compile assets:verify )
 
 Rake::TestTask.new do |t|
   t.libs << "test"
@@ -37,6 +38,39 @@ namespace :assets do
   desc "Compile Action Cable assets"
   task :compile do
     require "blade"
+    require "sprockets"
+    require "sprockets/export"
     Blade.build
   end
+
+  desc "Verify compiled Action Cable assets"
+  task :verify do
+    file = "lib/assets/compiled/action_cable.js"
+    pathname = Pathname.new("#{dir}/#{file}")
+
+    print "[verify] #{file} exists "
+    if pathname.exist?
+      puts "[OK]"
+    else
+      $stderr.puts "[FAIL]"
+      fail
+    end
+
+    print "[verify] #{file} is a UMD module "
+    if pathname.read =~ /module\.exports.*define\.amd/m
+      puts "[OK]"
+    else
+      $stderr.puts "[FAIL]"
+      fail
+    end
+
+    print "[verify] #{dir} can be required as a module "
+    stdout, stderr, status = Open3.capture3("node", "--print", "window = {}; require('#{dir}');")
+    if status.success?
+      puts "[OK]"
+    else
+      $stderr.puts "[FAIL]\n#{stderr}"
+      fail
+    end
+  end
 end