@Test
  public void testQueriesForValueInMapFieldWithoutIndex() throws Exception {
    region =
        CacheUtils.getCache().createRegionFactory(RegionShortcut.REPLICATE).create("portfolio");
    qs = CacheUtils.getQueryService();
    testQueriesForValueInMapField(region, qs);
  }
Test index object's comapreTo Function implementation correctness for indexes.
geode-core/src/integrationTest/java/org/apache/geode/cache/query/internal/index/MapRangeIndexMaintenanceJUnitTest.java