@Override
      public Object call() throws Exception {
        Region r = getCache().getRegion(rName);
        for (int i = 0; i <= 113; i++) {
          assertNull("Expected null but was " + r.get(i), r.get(i));
        }
        return null;
      }
This tests invalidateRegion functionality on partitioned regions
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/PartitionedRegionInvalidateDUnitTest.java