/*
 * Licensed to Elastic Search and Shay Banon under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership. Elastic Search 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.
 */

package org.elasticsearch.test.integration.search.scroll;

import org.elasticsearch.action.search.SearchResponse;
import org.elasticsearch.client.Client;
import org.elasticsearch.common.settings.ImmutableSettings;
import org.elasticsearch.common.unit.TimeValue;
import org.elasticsearch.search.SearchHit;
import org.elasticsearch.search.sort.SortOrder;
import org.elasticsearch.test.integration.AbstractNodesTests;
import org.testng.annotations.AfterClass;
import org.testng.annotations.BeforeClass;
import org.testng.annotations.Test;

import static org.elasticsearch.common.xcontent.XContentFactory.*;
import static org.elasticsearch.index.query.xcontent.QueryBuilders.*;
import static org.hamcrest.MatcherAssert.*;
import static org.hamcrest.Matchers.*;

/**
 * @author kimchy (shay.banon)
 */
public class SearchScrollTests extends AbstractNodesTests {

    private Client client;

    @BeforeClass public void createNodes() throws Exception {
        startNode("node1");
        startNode("node2");
        client = getClient();
    }

    @AfterClass public void closeNodes() {
        client.close();
        closeAllNodes();
    }

    protected Client getClient() {
        return client("node1");
    }

    @Test public void testSimpleScrollQueryThenFetch() throws Exception {
        try {
            client.admin().indices().prepareDelete("test").execute().actionGet();
        } catch (Exception e) {
            // ignore
        }
        client.admin().indices().prepareCreate("test").setSettings(ImmutableSettings.settingsBuilder().put("index.number_of_shards", 3)).execute().actionGet();
        client.admin().cluster().prepareHealth().setWaitForGreenStatus().execute().actionGet();

        client.admin().cluster().prepareHealth().setWaitForGreenStatus().execute().actionGet();

        for (int i = 0; i < 100; i++) {
            client.prepareIndex("test", "type1", Integer.toString(i)).setSource(jsonBuilder().startObject().field("field", i).endObject()).execute().actionGet();
        }

        client.admin().indices().prepareRefresh().execute().actionGet();

        SearchResponse searchResponse = client.prepareSearch()
                .setQuery(matchAllQuery())
                .setSize(35)
                .setScroll(TimeValue.timeValueMinutes(2))
                .addSort("field", SortOrder.ASC)
                .execute().actionGet();

        long counter = 0;

        assertThat(searchResponse.hits().getTotalHits(), equalTo(100l));
        assertThat(searchResponse.hits().hits().length, equalTo(35));
        for (SearchHit hit : searchResponse.hits()) {
            assertThat(((Number) hit.sortValues()[0]).longValue(), equalTo(counter++));
        }

        searchResponse = client.prepareSearchScroll(searchResponse.scrollId())
                .setScroll(TimeValue.timeValueMinutes(2))
                .execute().actionGet();

        assertThat(searchResponse.hits().getTotalHits(), equalTo(100l));
        assertThat(searchResponse.hits().hits().length, equalTo(35));
        for (SearchHit hit : searchResponse.hits()) {
            assertThat(((Number) hit.sortValues()[0]).longValue(), equalTo(counter++));
        }

        searchResponse = client.prepareSearchScroll(searchResponse.scrollId())
                .setScroll(TimeValue.timeValueMinutes(2))
                .execute().actionGet();

        assertThat(searchResponse.hits().getTotalHits(), equalTo(100l));
        assertThat(searchResponse.hits().hits().length, equalTo(30));
        for (SearchHit hit : searchResponse.hits()) {
            assertThat(((Number) hit.sortValues()[0]).longValue(), equalTo(counter++));
        }
    }
}

add a simple integration level test for scroll