@Test
  public void getReadsFromEmptyDB() throws Exception {
    createTable();
    createReplicatedRegionUsingGfsh();
    createJdbcDataSource();
    createMapping(REGION_NAME, DATA_SOURCE_NAME, true);
    dataserver.invoke(() -> {
      String key = "emp1";
      Region<Object, Object> region = ClusterStartupRule.getCache().getRegion(REGION_NAME);
      Object value = region.get(key);
      assertThat(value).isNull();
      assertThat(region.size()).isEqualTo(0);
    });
  }
End-to-end dunits for JDBC connector
geode-connectors/src/acceptanceTest/java/org/apache/geode/connectors/jdbc/JdbcDistributedTest.java