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 * 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
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package org.elasticsearch.action.admin.cluster.settings;

import org.elasticsearch.common.bytes.BytesReference;
import org.elasticsearch.common.xcontent.ToXContent;
import org.elasticsearch.common.xcontent.XContentParser;
import org.elasticsearch.common.xcontent.XContentType;
import org.elasticsearch.test.ESTestCase;
import org.elasticsearch.test.XContentTestUtils;

import java.io.IOException;
import java.util.Collections;

import static org.hamcrest.CoreMatchers.equalTo;

public class ClusterUpdateSettingsRequestTests extends ESTestCase {

    public void testFromXContent() throws IOException {
        doFromXContentTestWithRandomFields(false);
    }

    public void testFromXContentWithRandomFields() throws IOException {
        doFromXContentTestWithRandomFields(true);
    }

    private void doFromXContentTestWithRandomFields(boolean addRandomFields) throws IOException {
        final ClusterUpdateSettingsRequest request = createTestItem();
        boolean humanReadable = randomBoolean();
        final XContentType xContentType = XContentType.JSON;
        BytesReference originalBytes = toShuffledXContent(request, xContentType, ToXContent.EMPTY_PARAMS, humanReadable);

        if (addRandomFields) {
            String unsupportedField = "unsupported_field";
            BytesReference mutated = XContentTestUtils.insertIntoXContent(xContentType.xContent(), originalBytes,
                    Collections.singletonList(""), () -> unsupportedField, () -> randomAlphaOfLengthBetween(3, 10)).bytes();
            IllegalArgumentException iae = expectThrows(IllegalArgumentException.class,
                    () -> ClusterUpdateSettingsRequest.fromXContent(createParser(xContentType.xContent(), mutated)));
            assertThat(iae.getMessage(),
                    equalTo("[cluster_update_settings_request] unknown field [" + unsupportedField + "], parser not found"));
        } else {
            XContentParser parser = createParser(xContentType.xContent(), originalBytes);
            ClusterUpdateSettingsRequest parsedRequest = ClusterUpdateSettingsRequest.fromXContent(parser);

            assertNull(parser.nextToken());
            assertThat(parsedRequest.transientSettings(), equalTo(request.transientSettings()));
            assertThat(parsedRequest.persistentSettings(), equalTo(request.persistentSettings()));
        }
    }

    private static ClusterUpdateSettingsRequest createTestItem() {
        ClusterUpdateSettingsRequest request = new ClusterUpdateSettingsRequest();
        request.persistentSettings(ClusterUpdateSettingsResponseTests.randomClusterSettings(0, 2));
        request.transientSettings(ClusterUpdateSettingsResponseTests.randomClusterSettings(0, 2));
        return request;
    }
}
