Clean up test for delete_queue. Add assertion for queue deletion. Fix a copy paste error.

Author: shashankmehra

spec/integration/api_endpoints_spec.rb

@@ -505,6 +505,7 @@ def await_event_propagation
     it "deletes a queue" do
       q = @channel.queue(queue_name, durable: false)
       subject.delete_queue("/", queue_name)
+      expect { subject.queue_info("/", queue_name) }.to raise_error(Faraday::ResourceNotFound)
     end
 
     it "doesn't delete non-empty queue if if-empty is set" do
@@ -516,21 +517,20 @@ def await_event_propagation
 
       subject.purge_queue("/", q.name)
       subject.delete_queue("/", queue_name, false, true)
+      expect { subject.queue_info("/", queue_name) }.to raise_error(Faraday::ResourceNotFound)
     end
 
     it "doesn't delete used queue if if-unused is set" do
       q = @channel.queue(queue_name, durable: false)
-      # Simulate the queue being used by creating a consumer
-      consumer = q.subscribe do |_delivery_info, _properties, _body|
-        # consumer block
-      end
+      consumer = q.subscribe
 
       expect do
         subject.delete_queue("/", queue_name, true, false)
       end.to raise_error(Faraday::ClientError)
 
       consumer.cancel
-      subject.delete_queue("/", queue_name, false, true)
+      subject.delete_queue("/", queue_name, true, false)
+      expect { subject.queue_info("/", queue_name) }.to raise_error(Faraday::ResourceNotFound)
     end
   end