@Test
  public void testDeltaPropagationForPR() throws Exception {
    createCacheInAllPRVms();
    createDeltaPR(false);
    put();
    boolean deltaUsed1 = dataStore1.invoke(this::checkForDelta);
    boolean deltaUsed2 = dataStore2.invoke(this::checkForDelta);
    assertTrue("Delta Propagation Not Used in PR", (deltaUsed1 && deltaUsed2));
  }
1) Put delta objects on accessor node. 2) From accessor to primary delta gets propagated as
part of <code>PutMessage</code> delta. 3) From primary to secondary delta gets propagated as
part RR distribution.
geode-cq/src/distributedTest/java/org/apache/geode/internal/cache/PRDeltaPropagationDistributedTest.java