protected int expectedUpdates() {
    return getVMCount() + 1;
  }
Verifies {@code CacheListener} invocations for {@code Region} operations in multiple members.

<p>
Converted from JUnit 3.

@since GemFire 2.0
geode-core/src/distributedTest/java/org/apache/geode/cache/ReplicateCacheListenerDistributedTest.java