@Test
  public void verifyServerAPIs() {
    assertThat(region.sizeOnServer()).isEqualTo(bulkData.size());
    Set<String> keysOnServer = region.keySetOnServer();
    for (String entry : bulkData.keySet()) {
      assertThat(region.containsKeyOnServer(entry)).isTrue();
      assertThat(keysOnServer).contains(entry);
    }
  }
A test of the Region API's methods that directly access the server cache
geode-assembly/src/acceptanceTest/java/org/apache/geode/client/sni/SingleServerSNIAcceptanceTest.java