@Test
  public void endDeltaPreparedIncrementsDeltasPrepared() {
    cachePerfStats.endDeltaPrepared(1);

    assertThat(statistics.getLong(deltasPreparedId)).isEqualTo(1);
  }
Characterization test: Note that the only way to increment {@code deltasPrepared} is to invoke
{@code endDeltaPrepared}.
geode-core/src/test/java/org/apache/geode/internal/cache/CachePerfStatsTest.java