@Test
  public void getDeltaFullValuesRequestedDelegatesToStatistics() {
    statistics.incLong(deltaFullValuesRequestedId, Long.MAX_VALUE);

    assertThat(cachePerfStats.getDeltaFullValuesRequested()).isEqualTo(Long.MAX_VALUE);
  }
Characterization test: {@code deltaFullValuesSent} currently wraps to negative from max integer
value.
geode-core/src/test/java/org/apache/geode/internal/cache/CachePerfStatsTest.java