Fix tests related to new JavaScript path for generators

- Followup of https://github.com/rails/rails/commit/4838c1716a0340137d858fab49bf460e23be5a4b

railties/test/generators/app_generator_test.rb

@@ -603,7 +603,7 @@ def test_does_not_generate_system_test_files_if_skip_system_test_is_given
   def test_javascript_is_skipped_if_required
     run_generator [destination_root, "--skip-javascript"]
 
-    assert_no_file "app/assets/javascripts"
+    assert_no_file "app/javascript"
 
     assert_file "app/views/layouts/application.html.erb" do |contents|
       assert_match(/stylesheet_link_tag\s+'application', media: 'all' %>/, contents)

railties/test/generators/channel_generator_test.rb

@@ -57,7 +57,7 @@ def test_channel_asset_is_not_created_when_skip_assets_is_passed
     assert_no_file "app/javascript/channels/chat_channel.js"
   end
 
-  def test_cable_js_is_created_if_not_present_already
+  def test_consumer_js_is_created_if_not_present_already
     run_generator ["chat"]
     FileUtils.rm("#{destination_root}/app/javascript/channels/index.js")
     FileUtils.rm("#{destination_root}/app/javascript/channels/consumer.js")
@@ -72,7 +72,7 @@ def test_channel_on_revoke
     run_generator ["chat"], behavior: :revoke
 
     assert_no_file "app/channels/chat_channel.rb"
-    assert_no_file "app/assets/javascripts/channels/chat.js"
+    assert_no_file "app/javascript/channels/chat_channel.js"
 
     assert_file "app/channels/application_cable/channel.rb"
     assert_file "app/channels/application_cable/connection.rb"
@@ -86,7 +86,7 @@ def test_channel_suffix_is_not_duplicated
     assert_no_file "app/channels/chat_channel_channel.rb"
     assert_file "app/channels/chat_channel.rb"
 
-    assert_no_file "app/assets/javascripts/channels/chat_channel.js"
+    assert_no_file "app/javascript/channels/chat_channel_channel.js"
     assert_file "app/javascript/channels/chat_channel.js"
   end
 end

railties/test/generators/controller_generator_test.rb

@@ -130,8 +130,6 @@ def test_controller_suffix_is_not_duplicated
     assert_no_file "app/helpers/account_controller_helper.rb"
     assert_file "app/helpers/account_helper.rb"
 
-    assert_no_file "app/assets/javascripts/account_controller.js"
-
     assert_no_file "app/assets/stylesheets/account_controller.css"
     assert_file "app/assets/stylesheets/account.css"
   end

railties/test/generators/shared_generator_tests.rb

@@ -305,8 +305,8 @@ def test_generator_if_skip_action_cable_is_given
     run_generator [destination_root, "--skip-action-cable"]
     assert_file "#{application_path}/config/application.rb", /#\s+require\s+["']action_cable\/engine["']/
     assert_no_file "#{application_path}/config/cable.yml"
-    assert_no_file "#{application_path}/app/assets/javascripts/cable.js"
-    assert_no_directory "#{application_path}/app/assets/javascripts/channels"
+    assert_no_file "#{application_path}/app/javascript/consumer.js"
+    assert_no_directory "#{application_path}/app/javascript/channels"
     assert_no_directory "#{application_path}/app/channels"
     assert_file "Gemfile" do |content|
       assert_no_match(/redis/, content)