Restore rails-ujs.js UMD module support

1 files changed, 42 insertions, 1 deletions

diff --git a/actionview/Rakefile b/actionview/Rakefile
index 00ab92129d..4adcc723b1 100644
--- a/actionview/Rakefile
+++ b/actionview/Rakefile
@@ -1,10 +1,13 @@
 require "rake/testtask"
 require "fileutils"
+require "open3"
+
+dir = File.dirname(__FILE__)
 
 desc "Default Task"
 task default: :test
 
-task package: "assets:compile"
+task package: %w( assets:compile assets:verify )
 
 # Run the unit tests
 
@@ -84,8 +87,46 @@ namespace :assets do
   desc "Compile Action View 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/rails-ujs.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 "
+    js = <<-JS
+      window = { Event: class {} }
+      class Element {}
+      require('#{dir}')
+    JS
+    stdout, stderr, status = Open3.capture3("node", "--print", js)
+    if status.success?
+      puts "[OK]"
+    else
+      $stderr.puts "[FAIL]\n#{stderr}"
+      fail
+    end
+  end
 end
 
 task :lines do