/**
 * 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.hadoop.hive.common.type;

import static org.junit.Assert.*;
import org.junit.Test;

/**
 * This code was based on code from Microsoft's PolyBase.
 */
public class TestSqlMathUtil {
  @Test
  public void testDivision() {
    {
      int[] dividend = new int[] { 1 + 33, 2 + 21, 3, 4 + 10, 20, 30, 40, 0 };
      int[] divisor = new int[] { 1, 2, 3, 4 };
      int[] quotient = new int[5];
      int[] remainder = SqlMathUtil.divideMultiPrecision(dividend, divisor,
          quotient);
      assertArrayEquals(new int[] { 1, 0, 0, 10, 0 }, quotient);
      assertArrayEquals(new int[] { 33, 21, 0, 0, 0, 0, 0, 0, 0 }, remainder);
    }

    {
      int[] dividend = new int[] { 0xF7000000, 0, 0x39000000, 0 };
      int[] divisor = new int[] { 0xF700, 0, 0x3900, 0 };
      int[] quotient = new int[5];
      int[] remainder = SqlMathUtil.divideMultiPrecision(dividend, divisor,
          quotient);
      assertArrayEquals(new int[] { 0x10000, 0, 0, 0, 0 }, quotient);
      assertArrayEquals(new int[] { 0, 0, 0, 0, 0 }, remainder);
    }

    {
      // Zero dividend
      int[] dividend = new int[] { 0, 0, 0, 0 };
      int[] divisor = new int[] { 0xF700, 0, 0x3900, 0 };
      int[] quotient = new int[5];
      int[] remainder = SqlMathUtil.divideMultiPrecision(dividend, divisor,
          quotient);
      assertArrayEquals(new int[] { 0, 0, 0, 0, 0 }, quotient);
      assertArrayEquals(new int[] { 0, 0, 0, 0, 0 }, remainder);
    }
  }
}
