@After
  public void tearDown() throws IOException {
    PartitionedRegionTestHelper.closeCache();
    FileUtils.deleteDirectory(DISK_DIR);
  }
This test verifies that stats are collected properly for the SingleNode and Single
PartitionedRegion
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/PartitionedRegionStatsJUnitTest.java