Use the generators options to not generate channel assets

actioncable/lib/rails/generators/channel/channel_generator.rb

@@ -5,11 +5,14 @@ class ChannelGenerator < NamedBase
 
       argument :actions, type: :array, default: [], banner: "method method"
 
+      class_option :assets, type: :boolean
+
       check_class_collision suffix: "Channel"
 
       def create_channel_file
         template "channel.rb", File.join('app/channels', class_path, "#{file_name}_channel.rb")
-        if Rails::Generators.options[:rails][:assets]
+
+        if options[:assets]
           template "assets/channel.coffee", File.join('app/assets/javascripts/channels', class_path, "#{file_name}.coffee")
         end
       end

railties/test/generators/channel_generator_test.rb

@@ -17,17 +17,13 @@ def test_channel_is_created
     end
   end
 
-  def test_channel_asset_is_not_created
-    enable_assets = Rails::Generators.options[:rails][:assets]
-    Rails::Generators.options[:rails][:assets] = false
-    run_generator ['chat']
+  def test_channel_asset_is_not_created_when_skip_assets_is_passed
+    run_generator ['chat', '--skip-assets']
 
     assert_file "app/channels/chat_channel.rb" do |channel|
       assert_match(/class ChatChannel < ApplicationCable::Channel/, channel)
     end
 
     assert_no_file "app/assets/javascripts/channels/chat.coffee"
-  ensure
-    Rails::Generators.options[:rails][:assets] = enable_assets
   end
 end