Test num_events in NumberOfEntities

Signed-off-by: Emerson Knapp <eknapp@amazon.com>

rclpy/test/test_waitable.py

@@ -380,21 +380,23 @@ def test_waitable_with_mutually_exclusive_callback_group(self):
 class TestNumberOfEntities(unittest.TestCase):
 
     def test_add(self):
-        n1 = NumberOfEntities(1, 2, 3, 4, 5)
-        n2 = NumberOfEntities(10, 20, 30, 40, 50)
+        n1 = NumberOfEntities(1, 2, 3, 4, 5, 6)
+        n2 = NumberOfEntities(10, 20, 30, 40, 50, 60)
         n = n1 + n2
         assert n.num_subscriptions == 11
         assert n.num_guard_conditions == 22
         assert n.num_timers == 33
         assert n.num_clients == 44
         assert n.num_services == 55
+        assert n.num_events == 66
 
     def test_add_assign(self):
-        n1 = NumberOfEntities(1, 2, 3, 4, 5)
-        n2 = NumberOfEntities(10, 20, 30, 40, 50)
+        n1 = NumberOfEntities(1, 2, 3, 4, 5, 6)
+        n2 = NumberOfEntities(10, 20, 30, 40, 50, 60)
         n1 += n2
         assert n1.num_subscriptions == 11
         assert n1.num_guard_conditions == 22
         assert n1.num_timers == 33
         assert n1.num_clients == 44
         assert n1.num_services == 55
+        assert n1.num_events == 66