TestDenseEstimator.java

/*
 * Copyright (C) 2012 Facebook, Inc.
 *
 * 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.stats.cardinality;

import org.testng.annotations.Test;

import static org.testng.Assert.assertEquals;

public class TestDenseEstimator
  extends TestEstimator {
  @Override
  protected Estimator getEstimator() {
    return new DenseEstimator(1024);
  }

  @Test
  public void testRoundtrip() {
    Estimator estimator = getEstimator();

    for (int i = 0; i < estimator.getNumberOfBuckets(); i++) {
      estimator.setIfGreater(i, i % 16);
    }

    DenseEstimator other = new DenseEstimator(estimator.buckets());
    assertEquals(estimator.buckets(), other.buckets());
  }
}