/*
* 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.TestingBatchIterators;
import org.junit.Test;
import java.util.List;
import java.util.function.BooleanSupplier;
import java.util.function.Function;
import java.util.stream.Collectors;
import java.util.stream.IntStream;
public class FilteringBatchIteratorTest {
private Function<Columns, BooleanSupplier> evenRow = inputs -> {
final Input<?> input = inputs.get(0);
return () -> ((Integer) input.value()) % 2 == 0;
};
@Test
public void testFilteringBatchIterator() throws Exception {
List<Object[]> expectedResult = IntStream.iterate(0, l -> l + 2).limit(10).mapToObj(
l -> new Object[]{l}).collect(Collectors.toList());
BatchIteratorTester tester = new BatchIteratorTester(
() -> new FilteringBatchIterator(TestingBatchIterators.range(0, 20), evenRow));
tester.verifyResultAndEdgeCaseBehaviour(expectedResult);
}
}