/*
 * SPDX-License-Identifier: Apache-2.0
 *
 * The OpenSearch Contributors require contributions made to
 * this file be licensed under the Apache-2.0 license or a
 * compatible open source license.
 */

/*
 * Licensed to Elasticsearch under one or more contributor
 * license agreements. See the NOTICE file distributed with
 * this work for additional information regarding copyright
 * ownership. Elasticsearch licenses this file to you under
 * the Apache License, Version 2.0 (the "License"); you may
 * not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

/*
 * Modifications Copyright OpenSearch Contributors. See
 * GitHub history for details.
 */

package org.opensearch.index.mapper;

import static org.hamcrest.core.IsEqual.equalTo;

public class MultiFieldCopyToMapperTests extends MapperServiceTestCase {

    public void testExceptionForCopyToInMultiFields() {

        Exception e = expectThrows(IllegalArgumentException.class, () -> createMapperService(mapping(b -> {
            b.startObject("a").field("type", "text").endObject();
            b.startObject("b");
            {
                b.field("type", "text");
                b.startObject("fields");
                {
                    b.startObject("subfield");
                    {
                        b.field("type", "text");
                        b.field("copy_to", "a");
                    }
                    b.endObject();
                }
                b.endObject();
            }
            b.endObject();
        })));

        assertThat(e.getMessage(), equalTo("[copy_to] may not be used to copy from a multi-field: [b.subfield]"));
    }

}