2 files changed, 31 insertions, 4 deletions
diff --git a/guides/source/active_storage_overview.md b/guides/source/active_storage_overview.md
index 474a93c83e..e3bb41ae32 100644
--- a/guides/source/active_storage_overview.md
+++ b/guides/source/active_storage_overview.md
@@ -434,7 +434,7 @@ original blob into the specified format and redirect to its new service
 location.
 
 ```erb
-<%= image_tag user.avatar.variant(resize_to_fit: [100, 100]) %>
+<%= image_tag user.avatar.variant(resize_to_limit: [100, 100]) %>
 ```
 
 To switch to the Vips processor, you would add the following to
diff --git a/guides/source/testing.md b/guides/source/testing.md
index f9661c52a0..9667521f3b 100644
--- a/guides/source/testing.md
+++ b/guides/source/testing.md
@@ -1806,16 +1806,16 @@ require "test_helper"
 
 class WebNotificationsChannelTest < ActionCable::Channel::TestCase
   test "subscribes and stream for user" do
-    stub_connection current_user: users[:john]
+    stub_connection current_user: users(:john)
 
     subscribe
 
-    assert_has_stream_for users[:john]
+    assert_has_stream_for users(:john)
   end
 end
 ```
 
-See the API documentation for [`AcionCable::Channel::TestCase`](http://api.rubyonrails.org/classes/ActionCable/Channel/TestCase.html) for more information.
+See the API documentation for [`ActionCable::Channel::TestCase`](http://api.rubyonrails.org/classes/ActionCable/Channel/TestCase.html) for more information.
 
 ### Custom Assertions And Testing Broadcasts Inside Other Components
 
@@ -1837,6 +1837,33 @@ class ProductTest < ActionCable::TestCase
 end
 ```
 
+If you want to test the broadcasting made with `Channel.broadcast_to`, you shoud use
+`Channel.broadcasting_for` to generate an underlying stream name:
+
+```ruby
+# app/jobs/chat_relay_job.rb
+class ChatRelayJob < ApplicationJob
+  def perform_later(room, message)
+    ChatChannel.broadcast_to room, text: message
+  end
+end
+
+# test/jobs/chat_relay_job_test.rb
+require 'test_helper'
+
+class ChatRelayJobTest < ActiveJob::TestCase
+  include ActionCable::TestHelper
+
+  test "broadcast message to room" do
+    room = rooms(:all)
+
+    assert_broadcast_on(ChatChannel.broadcasting_for(room), text: "Hi!") do
+      ChatRelayJob.perform_now(room, "Hi!")
+    end
+  end
+end
+```
+
 Additional Testing Resources
 ----------------------------