@Test
  public void testSetNamespaceOwnership() throws TException {
    setNamespaceOwnershipAndVerify(
        "set_individual_ownership_on_default_owner",
        ImmutableMap.of(),
        ImmutableMap.of(
            HiveCatalog.HMS_DB_OWNER,
            "some_individual_owner",
            HiveCatalog.HMS_DB_OWNER_TYPE,
            PrincipalType.USER.name()),
        System.getProperty("user.name"),
        PrincipalType.USER,
        "some_individual_owner",
        PrincipalType.USER);

    setNamespaceOwnershipAndVerify(
        "set_group_ownership_on_default_owner",
        ImmutableMap.of(),
        ImmutableMap.of(
            HiveCatalog.HMS_DB_OWNER,
            "some_group_owner",
            HiveCatalog.HMS_DB_OWNER_TYPE,
            PrincipalType.GROUP.name()),
        System.getProperty("user.name"),
        PrincipalType.USER,
        "some_group_owner",
        PrincipalType.GROUP);

    setNamespaceOwnershipAndVerify(
        "change_individual_to_group_ownership",
        ImmutableMap.of(HiveCatalog.HMS_DB_OWNER, "some_owner"),
        ImmutableMap.of(
            HiveCatalog.HMS_DB_OWNER,
            "some_group_owner",
            HiveCatalog.HMS_DB_OWNER_TYPE,
            PrincipalType.GROUP.name()),
        "some_owner",
        PrincipalType.USER,
        "some_group_owner",
        PrincipalType.GROUP);

    setNamespaceOwnershipAndVerify(
        "change_group_to_individual_ownership",
        ImmutableMap.of(
            HiveCatalog.HMS_DB_OWNER,
            "some_group_owner",
            HiveCatalog.HMS_DB_OWNER_TYPE,
            PrincipalType.GROUP.name()),
        ImmutableMap.of(
            HiveCatalog.HMS_DB_OWNER,
            "some_individual_owner",
            HiveCatalog.HMS_DB_OWNER_TYPE,
            PrincipalType.USER.name()),
        "some_group_owner",
        PrincipalType.GROUP,
        "some_individual_owner",
        PrincipalType.USER);

    assertThatThrownBy(
        () ->
            setNamespaceOwnershipAndVerify(
                "set_owner_without_setting_owner_type",
                ImmutableMap.of(),
                ImmutableMap.of(HiveCatalog.HMS_DB_OWNER, "some_individual_owner"),
                System.getProperty("user.name"),
                PrincipalType.USER,
                "no_post_setting_expectation_due_to_exception_thrown",
                null))
        .isInstanceOf(IllegalArgumentException.class)
        .hasMessage(
            String.format(
                "Setting %s and %s has to be performed together or not at all",
                HiveCatalog.HMS_DB_OWNER_TYPE, HiveCatalog.HMS_DB_OWNER));

    assertThatThrownBy(
        () ->
            setNamespaceOwnershipAndVerify(
                "set_owner_type_without_setting_owner",
                ImmutableMap.of(HiveCatalog.HMS_DB_OWNER, "some_owner"),
                ImmutableMap.of(HiveCatalog.HMS_DB_OWNER_TYPE, PrincipalType.GROUP.name()),
                "some_owner",
                PrincipalType.USER,
                "no_post_setting_expectation_due_to_exception_thrown",
                null))
        .isInstanceOf(IllegalArgumentException.class)
        .hasMessage(
            String.format(
                "Setting %s and %s has to be performed together or not at all",
                HiveCatalog.HMS_DB_OWNER_TYPE, HiveCatalog.HMS_DB_OWNER));

    assertThatThrownBy(
        () ->
            setNamespaceOwnershipAndVerify(
                "set_invalid_owner_type",
                ImmutableMap.of(),
                ImmutableMap.of(
                    HiveCatalog.HMS_DB_OWNER, "iceberg",
                    HiveCatalog.HMS_DB_OWNER_TYPE, "invalidOwnerType"),
                System.getProperty("user.name"),
                PrincipalType.USER,
                "no_post_setting_expectation_due_to_exception_thrown",
                null))
        .isInstanceOf(IllegalArgumentException.class)
        .hasMessage(
            "No enum constant org.apache.hadoop.hive.metastore.api.PrincipalType.invalidOwnerType");
  }
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