From e0ac3498c669fad7aab18436fc84f9e52b72bc8a Mon Sep 17 00:00:00 2001
From: Javan Makhmali <javan@javan.us>
Date: Thu, 30 Mar 2017 14:40:39 -0400
Subject: Restore rails-ujs.js UMD module support

---
 actionview/Rakefile | 43 ++++++++++++++++++++++++++++++++++++++++++-
 1 file changed, 42 insertions(+), 1 deletion(-)

(limited to 'actionview')

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
-- 
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