@Test
  public void testSpecialException() {
    DiskStoreID id0 = new DiskStoreID(0, 0);
    DiskStoreID id1 = new DiskStoreID(0, 1);
    DiskStoreID id2 = new DiskStoreID(1, 0);

    DiskRegionVersionVector rvv0 = new DiskRegionVersionVector(id0);
    rvv0.getNextVersion();
    rvv0.getNextVersion();
    rvv0.getNextVersion();

    rvv0.recordVersion(id1, 1);
    rvv0.recordVersion(id1, 2);

    DiskRegionVersionVector rvv1 = new DiskRegionVersionVector(id1);
    rvv1.recordVersions(rvv0);

    rvv1.recordVersion(id1, 3);
    RegionVersionHolder holder_at_rvv1 = rvv1.getLocalExceptions();
    RegionVersionHolder holder_at_rvv0 = rvv0.getMemberToVersion().get(id1);
    holder_at_rvv1.addException(2, 4);
    assertFalse(rvv1.isNewerThanOrCanFillExceptionsFor(rvv0));
    assertFalse(rvv0.isNewerThanOrCanFillExceptionsFor(rvv1));
    assertTrue(rvv1.dominates(rvv0));
    assertTrue(rvv0.dominates(rvv1));
  }
Test that we can copy the member to version map correctly.
geode-core/src/test/java/org/apache/geode/internal/cache/versions/RegionVersionVectorTest.java