pinot-core/src/test/java/org/apache/pinot/core/startree/v2/PreAggregatedDistinctCountHLLStarTreeV2Test.java

/**
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF 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,
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package org.apache.pinot.core.startree.v2;

import com.clearspring.analytics.stream.cardinality.HyperLogLog;
import java.util.Random;
import org.apache.pinot.core.common.ObjectSerDeUtils;
import org.apache.pinot.segment.local.aggregator.DistinctCountHLLValueAggregator;
import org.apache.pinot.segment.local.aggregator.ValueAggregator;
import org.apache.pinot.spi.data.FieldSpec.DataType;

import static org.testng.Assert.assertEquals;


public class PreAggregatedDistinctCountHLLStarTreeV2Test extends BaseStarTreeV2Test<Object, HyperLogLog> {
  // Use non-default log2m
  private static final int LOG2M = 7;

  @Override
  ValueAggregator<Object, HyperLogLog> getValueAggregator() {
    return new DistinctCountHLLValueAggregator();
  }

  @Override
  DataType getRawValueType() {
    return DataType.BYTES;
  }

  @Override
  Object getRandomRawValue(Random random) {
    HyperLogLog hyperLogLog = new HyperLogLog(LOG2M);
    hyperLogLog.offer(random.nextInt(100));
    hyperLogLog.offer(random.nextInt(100));
    return ObjectSerDeUtils.HYPER_LOG_LOG_SER_DE.serialize(hyperLogLog);
  }

  @Override
  void assertAggregatedValue(HyperLogLog starTreeResult, HyperLogLog nonStarTreeResult) {
    assertEquals(starTreeResult.cardinality(), nonStarTreeResult.cardinality());
  }
}