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 * 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
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package org.elasticsearch.percolator;

import org.elasticsearch.Version;
import org.elasticsearch.action.index.IndexRequestBuilder;
import org.elasticsearch.action.percolate.PercolateResponse;
import org.elasticsearch.action.percolate.PercolateSourceBuilder;
import org.elasticsearch.index.percolator.PercolatorException;
import org.elasticsearch.index.query.QueryParsingException;
import org.elasticsearch.test.ESIntegTestCase;
import org.junit.Test;

import static org.elasticsearch.common.xcontent.XContentFactory.jsonBuilder;
import static org.elasticsearch.index.query.QueryBuilders.termQuery;
import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertAcked;
import static org.elasticsearch.test.hamcrest.ElasticsearchAssertions.assertMatchCount;
import static org.hamcrest.Matchers.instanceOf;

/**
 */
public class PercolatorBackwardsCompatibilityIT extends ESIntegTestCase {

    @Test
    public void testPercolatorUpgrading() throws Exception {
        // Simulates an index created on an node before 1.4.0 where the field resolution isn't strict.
        assertAcked(prepareCreate("test")
                .setSettings(settings(Version.V_1_3_0).put(indexSettings())));
        ensureGreen();
        int numDocs = randomIntBetween(100, 150);
        IndexRequestBuilder[] docs = new IndexRequestBuilder[numDocs];
        for (int i = 0; i < numDocs; i++) {
            docs[i] = client().prepareIndex("test", PercolatorService.TYPE_NAME)
                    .setSource(jsonBuilder().startObject().field("query", termQuery("field1", "value")).endObject());
        }
        indexRandom(true, docs);
        PercolateResponse response = client().preparePercolate().setIndices("test").setDocumentType("type")
                .setPercolateDoc(new PercolateSourceBuilder.DocBuilder().setDoc("field1", "value"))
                .get();
        assertMatchCount(response, (long) numDocs);

        // After upgrade indices, indices created before the upgrade allow that queries refer to fields not available in mapping
        client().prepareIndex("test", PercolatorService.TYPE_NAME)
                .setSource(jsonBuilder().startObject().field("query", termQuery("field2", "value")).endObject()).get();

        // However on new indices, the field resolution is strict, no queries with unmapped fields are allowed
        createIndex("test2");
        try {
            client().prepareIndex("test2", PercolatorService.TYPE_NAME)
                    .setSource(jsonBuilder().startObject().field("query", termQuery("field1", "value")).endObject()).get();
            fail();
        } catch (PercolatorException e) {
            e.printStackTrace();
            assertThat(e.getRootCause(), instanceOf(QueryParsingException.class));
        }
    }

}