Don't reject unknown types.

Sneakers retries rejects, when really we just don't want to do anything.

app/workers/plum_event_handler.rb

@@ -7,11 +7,7 @@ class PlumEventHandler
 
   def work(msg)
     msg = JSON.parse(msg)
-    result = PlumEventProcessor.new(msg).process
-    if result
-      ack!
-    else
-      reject!
-    end
+    PlumEventProcessor.new(msg).process
+    ack!
   end
 end

spec/workers/plum_event_handler_spec.rb

@@ -25,15 +25,15 @@
       expect(PlumEventProcessor).to have_received(:new).with(msg)
       expect(handler).to have_received(:ack!)
     end
-    it "rejects the message if the processing fails" do
+    it "acknowleges the message if the event is unknown" do
       plum_event_processor = instance_double(PlumEventProcessor, process: false)
       allow(PlumEventProcessor).to receive(:new).and_return(plum_event_processor)
 
       handler.work(msg.to_json)
 
       expect(plum_event_processor).to have_received(:process)
       expect(PlumEventProcessor).to have_received(:new).with(msg)
-      expect(handler).to have_received(:reject!)
+      expect(handler).to have_received(:ack!)
     end
   end
 end