@Test
  public void testRedefineOfDefaultDiskStore() throws Exception {
    CacheCreation cache = new CacheCreation();
    DiskStoreFactory dsf = cache.createDiskStoreFactory();
    dsf.setAutoCompact(!DiskStoreFactory.DEFAULT_AUTO_COMPACT);
    DiskStore ds1 = dsf.create(DiskStoreFactory.DEFAULT_DISK_STORE_NAME);

    RegionAttributesCreation attrs = new RegionAttributesCreation(cache);
    attrs.setScope(Scope.DISTRIBUTED_ACK);
    attrs.setDataPolicy(DataPolicy.PERSISTENT_REPLICATE);
    AttributesFactory factory = new AttributesFactory(attrs);
    RegionAttributes ra = factory.create();

    RegionCreation root = (RegionCreation) cache.createRegion("root", ra);

    testXml(cache);

    Cache c = getCache();
    assertNotNull(c);

    DiskStore ds2 = c.findDiskStore(DiskStoreFactory.DEFAULT_DISK_STORE_NAME);
    assertNotNull(ds2);
    assertEquals(ds1.getAutoCompact(), ds2.getAutoCompact());
  }
test for enabling PRsingleHop feature. Test for enabling multiuser-authentication attribute.
geode-core/src/distributedTest/java/org/apache/geode/cache30/CacheXml66DUnitTest.java