/*
 * 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.BatchIteratorTester;
import io.crate.testing.BatchSimulatingIterator;
import io.crate.testing.RowGenerator;
import org.junit.Test;

import java.util.Arrays;
import java.util.List;
import java.util.function.Supplier;
import java.util.stream.Collectors;
import java.util.stream.StreamSupport;

public class RowsBatchIteratorTest {

    @Test
    public void testCollectRows() throws Exception {
        List<Row> rows = Arrays.asList(new Row1(10), new Row1(20));
        Supplier<BatchIterator> batchIteratorSupplier = () -> RowsBatchIterator.newInstance(rows, 1);
        BatchIteratorTester tester = new BatchIteratorTester(batchIteratorSupplier);
        List<Object[]> expectedResult = Arrays.asList(new Object[]{10}, new Object[]{20});
        tester.verifyResultAndEdgeCaseBehaviour(expectedResult);
    }

    @Test
    public void testCollectRowsWithSimulatedBatches() throws Exception {
        Iterable<Row> rows = RowGenerator.range(0, 50);
        Supplier<BatchIterator> batchIteratorSupplier = () -> new CloseAssertingBatchIterator(
            new BatchSimulatingIterator(
                RowsBatchIterator.newInstance(rows, 1),
                10,
                5,
                null
            )
        );
        BatchIteratorTester tester = new BatchIteratorTester(batchIteratorSupplier);
        List<Object[]> expectedResult = StreamSupport.stream(rows.spliterator(), false)
            .map(Row::materialize)
            .collect(Collectors.toList());
        tester.verifyResultAndEdgeCaseBehaviour(expectedResult);
    }
}