ActionCable Channel TestCase Behavior CHANNEL_IDENTIFIER constant CHANNEL_IDENTIFIER Ruby on Rails 8.0.4 Since v6.0.6 Available in: v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.0.4 v8.1.2 Compare with: … v6.0.6 v6.1.7.10 v7.0.10 v7.1.6 v7.2.3 v8.1.2 No documentation comment.