Merge pull request #123897 from p0lyn0mial/upstream-cacher-decrease-running-time-of-empty-watch-event-cache

apiserver/storage/cacher: decrease of running time of TestEmptyWatchEventCache

staging/src/k8s.io/apiserver/pkg/storage/cacher/cacher_whitebox_test.go

@@ -431,7 +431,14 @@ func TestEmptyWatchEventCache(t *testing.T) {
 				if e, a := tt.expectedEvent.Object, event.Object; !apiequality.Semantic.DeepDerivative(e, a) {
 					t.Errorf("Expected: %#v, got: %#v", e, a)
 				}
-			case <-time.After(3 * time.Second):
+			case <-time.After(1 * time.Second):
+				// the watch was established otherwise
+				// we would be blocking on cache.Watch(...)
+				// in addition to that, the tests are serial in nature,
+				// meaning that there is no other actor
+				// that could add items to the database,
+				// which could result in receiving new items.
+				// given that waiting 1s seems okay
 				if tt.expectedEvent != nil {
 					t.Errorf("Failed to get an event")
 				}