@Test
  public void incDeltasSentPreparedIncrementsDeltasSent() {
    cachePerfStats.incDeltasSent();

    assertThat(statistics.getLong(deltasSentId)).isEqualTo(1);
  }
Characterization test: {@code deltasPrepared} currently wraps to negative from max integer
value.
geode-core/src/test/java/org/apache/geode/internal/cache/CachePerfStatsTest.java