@Test
  public void testEmptyRegionRecover() {
    diskProps.setDiskDirs(dirs);
    region = DiskRegionHelperFactory.getSyncPersistOnlyRegion(cache, diskProps, Scope.LOCAL);
    Assert.assertTrue(region.size() == 0);
    verifyOplogSizeZeroAfterRecovery(region);
    region.close();
    region = DiskRegionHelperFactory.getSyncPersistOnlyRegion(cache, diskProps, Scope.LOCAL);
    Assert.assertTrue(region.size() == 0);
    verifyOplogSizeZeroAfterRecovery(region);
    region.close();
    region = DiskRegionHelperFactory.getSyncPersistOnlyRegion(cache, diskProps, Scope.LOCAL);
    Assert.assertTrue(region.size() == 0);
    verifyOplogSizeZeroAfterRecovery(region);
    region.close();
    region = DiskRegionHelperFactory.getSyncPersistOnlyRegion(cache, diskProps, Scope.LOCAL);
    Assert.assertTrue(region.size() == 0);
    verifyOplogSizeZeroAfterRecovery(region);
    region.close();
    region = DiskRegionHelperFactory.getSyncPersistOnlyRegion(cache, diskProps, Scope.LOCAL);
    Assert.assertTrue(region.size() == 0);
    verifyOplogSizeZeroAfterRecovery(region);
    // region.close();
  }
to validate the get operation performed on a byte array of length zero
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/DiskRegRecoveryJUnitTest.java