It's possible since Rails 6 (3ea2857943dc294d7809930b4cc5b318b9c39577) to let the framework create Event objects, but the guides and docs weren't updated to lead with this example.
Manually instantiating an Event doesn't record CPU time and allocations, I've seen it more than once that people copy-pasting the example code get confused about these stats returning 0. The tests here show that - just like the apps I've worked on - the old pattern keeps getting copy-pasted.
This adds additional coverage to ActionCable::Server to validate that
its output follow the Rack SPEC.
In addition to using Rack::CONTENT_TYPE for the Content-Type header,
there was another change required: the Content-Type header cannot be
specified when the Response status is 204, so the default health check
status was updated to 200
Action Cable can be mounted standalone, but it loses the health check
route provided by the railties.
This change adds configuration for a health check rack app and a
health check route to "mount" the rack app.
Fixes#48185
Remove all `include ActiveSupport::Testing::MethodCallAssertions`
in actioncable's tests since we can do it only in `ActionCable::TestCase`
in order to prevent code duplication.
We use the same approach for other modules of Rails.
We have defined `ActionCable::TestCase` in `actioncable/test/test_helper.rb`
that we can use in order to prevent code duplication and build common
interface for actioncable's test.
Similar to the channel streaming side, these values must be strings for
ActionCable to behave as expected. The conversion will allow users to
send string-convertible values and get the expected behavior.
