@Override
          public String description() {
            return "expected " + expectedEvents + " events but received " + actualNoEvents;
          }
In this test do a create , update , update & destroy. The client should receive 3 callbacks (
craete , conflated update & destroy).
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/ha/HAConflationDistributedTest.java