@Test
  public void testToStringWithoutSetConf() {
    assertThatNoException()
        .isThrownBy(
            () -> {
              HiveCatalog hiveCatalog = new HiveCatalog();
              hiveCatalog.toString();
            });
  }
Run all the tests from abstract of {@link CatalogTests} with few specific tests related to HIVE.
iceberg/iceberg-catalog/src/test/java/org/apache/iceberg/hive/TestHiveCatalog.java