FIX: Load .js files from plugins in qunit testing env (#11304)

app/assets/javascripts/admin.js.erb

@@ -3,10 +3,10 @@ require_asset("main_include_admin.js")
 
 DiscoursePluginRegistry.admin_javascripts.each { |js| require_asset(js) }
 
-DiscoursePluginRegistry.each_globbed_asset(admin: true) do |f, ext|
+DiscoursePluginRegistry.each_globbed_asset(admin: true) do |f|
   if File.directory?(f)
     depend_on(f)
-  elsif f.to_s.end_with?(".#{ext}")
+  else
     require_asset(f)
   end
 end

app/assets/javascripts/discourse/tests/plugin_tests.js.erb

@@ -1,10 +1,10 @@
 <%
   DiscoursePluginRegistry.javascripts.each { |js| require_asset(js) }
   DiscoursePluginRegistry.handlebars.each { |hb| require_asset(hb) }
-  DiscoursePluginRegistry.each_globbed_asset do |f, ext|
+  DiscoursePluginRegistry.each_globbed_asset do |f|
     if File.directory?(f)
       depend_on(f)
-    elsif f.to_s.end_with?(".#{ext}")
+    else
       require_asset(f)
     end
   end

lib/discourse_plugin_registry.rb

@@ -131,8 +131,8 @@ class DiscoursePluginRegistry
         next if each_options[:admin]
       end
 
-      Dir.glob("#{root}/**/*") do |f|
-        yield f, ext
+      Dir.glob("#{root}/**/*.#{ext}") do |f|
+        yield f
       end
     end
   end

lib/plugin/instance.rb

@@ -588,11 +588,13 @@ class Plugin::Instance
 
       # Automatically include all ES6 JS and hbs files
       root_path = "#{root_dir_name}/assets/javascripts"
+      DiscoursePluginRegistry.register_glob(root_path, 'js') if transpile_js
       DiscoursePluginRegistry.register_glob(root_path, 'js.es6')
       DiscoursePluginRegistry.register_glob(root_path, 'hbs')
       DiscoursePluginRegistry.register_glob(root_path, 'hbr')
 
       admin_path = "#{root_dir_name}/admin/assets/javascripts"
+      DiscoursePluginRegistry.register_glob(admin_path, 'js', admin: true) if transpile_js
       DiscoursePluginRegistry.register_glob(admin_path, 'js.es6', admin: true)
       DiscoursePluginRegistry.register_glob(admin_path, 'hbs', admin: true)
       DiscoursePluginRegistry.register_glob(admin_path, 'hbr', admin: true)