private long getDestroyCount(PartitionedRegion pr) {
    return pr.getCache().getCachePerfStats().getDestroys();
  }
This is a test for PartitionedRegion destroy(key) operation.
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/PartitionedRegionSingleNodeOperationsJUnitTest.java