fix missing available_events method (#140)

CHANGELOG.md

@@ -2,6 +2,7 @@
 
 ## 2.4.5 (Unreleased)
 - **[Breaking]** Drop Ruby `3.0` support according to the EOL schedule.
+- [Fix] Restore `#available_events` notifications bus method.
 - [Change] Set minimum `karafka-rdkafka` on `0.17.6` to support new features.
 
 ## 2.4.4 (2024-07-20)

lib/karafka/core/monitoring/notifications.rb

@@ -28,6 +28,11 @@ def initialize
           @events_methods_map = {}
         end
 
+        # @return [Array<String>] list of available events
+        def available_events
+          @events_methods_map.keys
+        end
+
         # Registers a new event on which we can publish
         #
         # @param event_id [String] event id

spec/lib/karafka/core/monitoring/notifications_spec.rb

@@ -62,8 +62,11 @@ def on_message_produced_async(_event)
     end
   end
 
-  describe '#clear' do
+  describe '#available_events' do
+    it { expect(notifications.available_events).to eq([event_name]) }
+  end
 
+  describe '#clear' do
     describe 'without an argument' do
       before { notifications.subscribe(event_name) { raise } }