/*
* Licensed 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 com.facebook.presto.operator.aggregation;
import com.facebook.presto.spi.block.Block;
import com.facebook.presto.spi.block.BlockBuilder;
import com.facebook.presto.spi.block.BlockBuilderStatus;
import org.testng.annotations.Test;
import java.util.function.IntUnaryOperator;
import java.util.stream.IntStream;
import static com.facebook.presto.spi.type.BigintType.BIGINT;
import static org.testng.Assert.assertEquals;
public class TestTypedHistogram
{
@Test
public void testMassive()
throws Exception
{
BlockBuilder inputBlockBuilder = BIGINT.createBlockBuilder(new BlockBuilderStatus(), 5000);
TypedHistogram typedHistogram = new TypedHistogram(BIGINT, 1000);
IntStream.range(1, 2000)
.flatMap(i -> IntStream.iterate(i, IntUnaryOperator.identity()).limit(i))
.forEach(j -> BIGINT.writeLong(inputBlockBuilder, j));
Block inputBlock = inputBlockBuilder.build();
for (int i = 0; i < inputBlock.getPositionCount(); i++) {
typedHistogram.add(i, inputBlock, 1);
}
Block outputBlock = typedHistogram.serialize();
for (int i = 0; i < outputBlock.getPositionCount(); i += 2) {
assertEquals(BIGINT.getLong(outputBlock, i + 1), BIGINT.getLong(outputBlock, i));
}
}
}