/*
 * Licensed to Crate under one or more contributor license agreements.
 * See the NOTICE file distributed with this work for additional
 * information regarding copyright ownership.  Crate 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.
 *
 * However, if you have executed another commercial license agreement
 * with Crate these terms will supersede the license and you may use the
 * software solely pursuant to the terms of the relevant commercial
 * agreement.
 */

package io.crate.data;

import io.crate.testing.BatchSimulatingIterator;
import io.crate.testing.TestingBatchIterators;
import org.hamcrest.Matchers;
import org.junit.Test;

import java.util.List;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;
import java.util.stream.IntStream;

import static org.hamcrest.MatcherAssert.assertThat;
import static org.hamcrest.Matchers.is;

public class CollectingBatchConsumerTest {

    @Test
    public void testBatchedIteratorConsumption() throws Exception {
        List<Object[]> expectedResult = IntStream.range(0, 10)
            .mapToObj(i -> new Object[]{i})
            .collect(Collectors.toList());

        BatchSimulatingIterator batchSimulatingIterator =
            new BatchSimulatingIterator(TestingBatchIterators.range(0, 10),
                2,
                5,
                null);

        CollectingBatchConsumer<?, List<Object[]>> batchConsumer =
            new CollectingBatchConsumer(Collectors.mapping(Row::materialize, Collectors.toList()));

        batchConsumer.accept(batchSimulatingIterator, null);

        CompletableFuture<List<Object[]>> result = batchConsumer.resultFuture();
        List<Object[]> consumedRows = result.get(10, TimeUnit.SECONDS);

        assertThat(consumedRows.size(), is(10));
        assertThat(consumedRows, Matchers.contains(expectedResult.toArray(new Object[0])));
    }
}