src/test/java/org/apache/datasketches/quantiles/ItemsSketchSerDeTest.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,
 * 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 org.apache.datasketches.quantiles;

import static org.apache.datasketches.common.TestUtil.*;
import static org.testng.Assert.assertEquals;

import java.io.IOException;
import java.nio.file.Files;
import java.util.Comparator;

import org.apache.datasketches.common.ArrayOfStringsSerDe;
import org.testng.annotations.Test;

public class ItemsSketchSerDeTest {

  @Test(groups = {GENERATE_JAVA_FILES})
  public void generateBinariesForCompatibilityTesting() throws IOException {
    final int[] nArr = {0, 1, 10, 100, 1000, 10_000, 100_000, 1_000_000};
    for (final int n: nArr) {
      final ItemsSketch<String> sk = ItemsSketch.getInstance(String.class, new Comparator<String>() {
        @Override
        public int compare(final String s1, final String s2) {
          final Integer i1 = Integer.parseInt(s1);
          final Integer i2 = Integer.parseInt(s2);
          return i1.compareTo(i2);
        }
      });
      for (int i = 1; i <= n; i++) sk.update(Integer.toString(i));
      if (n > 0) {
        assertEquals(sk.getMinItem(), "1");
        assertEquals(sk.getMaxItem(), Integer.toString(n));
      }
      Files.newOutputStream(javaPath.resolve("quantiles_string_n" + n + "_java.sk"))
        .write(sk.toByteArray(new ArrayOfStringsSerDe()));
    }
  }

}