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   * 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.cassandra.index.sai.cql.types;
  
  import java.math.BigDecimal;
  import java.math.BigInteger;
  import java.math.RoundingMode;
  import java.nio.ByteBuffer;
  import java.util.Arrays;
  
  import org.junit.Test;
  
  import org.apache.cassandra.db.marshal.DecimalType;
  import org.apache.cassandra.db.marshal.IntegerType;
  import org.apache.cassandra.index.sai.utils.IndexTermType;
  import org.apache.cassandra.index.sai.utils.SAIRandomizedTester;
  
  import static org.junit.Assert.assertTrue;
  
  public class NumericTypeSortingTest extends SAIRandomizedTester
  {
      @Test
      public void testBigDecimalEncoding()
      {
          BigDecimal[] data = new BigDecimal[10000];
          for (int i = 0; i < data.length; i++)
          {
              BigDecimal divider = new BigDecimal(getRandom().nextBigInteger(1000).add(BigInteger.ONE));
              BigDecimal randomNumber = new BigDecimal(getRandom().nextBigInteger(1000)).divide(divider, RoundingMode.HALF_DOWN);
              if (getRandom().nextBoolean())
                  randomNumber = randomNumber.negate();
  
              data[i] = randomNumber;
          }
  
          IndexTermType indexTermType = createIndexTermType(DecimalType.instance);
  
          Arrays.sort(data, BigDecimal::compareTo);
  
          for (int i = 1; i < data.length; i++)
          {
              BigDecimal i0 = data[i - 1];
              BigDecimal i1 = data[i];
              assertTrue(i0 + " <= " + i1, i0.compareTo(i1) <= 0);
  
              ByteBuffer b0 = indexTermType.asIndexBytes(DecimalType.instance.decompose(i0));
  
              ByteBuffer b1 = indexTermType.asIndexBytes(DecimalType.instance.decompose(i1));
  
              assertTrue(i0 + " <= " + i1, indexTermType.compare(b0, b1) <= 0);
          }
      }
  
      @Test
      public void testBigIntEncoding()
      {
          BigInteger[] data = new BigInteger[10000];
          for (int i = 0; i < data.length; i++)
          {
              BigInteger divider = getRandom().nextBigInteger(1000).add(BigInteger.ONE);
              BigInteger randomNumber = getRandom().nextBigInteger(1000).divide(divider);
              if (getRandom().nextBoolean())
                  randomNumber = randomNumber.negate();
  
              data[i] = randomNumber;
          }
  
          Arrays.sort(data, BigInteger::compareTo);
  
          IndexTermType indexTermType = createIndexTermType(IntegerType.instance);
  
          for (int i = 1; i < data.length; i++)
          {
              BigInteger i0 = data[i - 1];
              BigInteger i1 = data[i];
              assertTrue(i0 + " <= " + i1, i0.compareTo(i1) <= 0);
  
              ByteBuffer b0 = indexTermType.asIndexBytes(IntegerType.instance.decompose(i0));
  
              ByteBuffer b1 = indexTermType.asIndexBytes(IntegerType.instance.decompose(i1));
  
              assertTrue(i0 + " <= " + i1, indexTermType.compare(b0, b1) <= 0);
          }
      }
  }
  