content: /*
   * 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.arrow.gandiva.evaluator;
  
  import static org.junit.jupiter.api.Assertions.assertTrue;
  
  import org.apache.arrow.vector.types.pojo.ArrowType;
  import org.junit.jupiter.api.Test;
  
  public class DecimalTypeUtilTest {
  
    @Test
    public void testOutputTypesForAdd() {
      ArrowType.Decimal operand1 = getDecimal(30, 10);
      ArrowType.Decimal operand2 = getDecimal(30, 10);
      ArrowType.Decimal resultType =
          DecimalTypeUtil.getResultTypeForOperation(
              DecimalTypeUtil.OperationType.ADD, operand1, operand2);
      assertTrue(getDecimal(31, 10).equals(resultType));
  
      operand1 = getDecimal(30, 6);
      operand2 = getDecimal(30, 5);
      resultType =
          DecimalTypeUtil.getResultTypeForOperation(
              DecimalTypeUtil.OperationType.ADD, operand1, operand2);
      assertTrue(getDecimal(32, 6).equals(resultType));
  
      operand1 = getDecimal(30, 10);
      operand2 = getDecimal(38, 10);
      resultType =
          DecimalTypeUtil.getResultTypeForOperation(
              DecimalTypeUtil.OperationType.ADD, operand1, operand2);
      assertTrue(getDecimal(38, 9).equals(resultType));
  
      operand1 = getDecimal(38, 10);
      operand2 = getDecimal(38, 38);
      resultType =
          DecimalTypeUtil.getResultTypeForOperation(
              DecimalTypeUtil.OperationType.ADD, operand1, operand2);
      assertTrue(getDecimal(38, 9).equals(resultType));
  
      operand1 = getDecimal(38, 10);
      operand2 = getDecimal(38, 2);
      resultType =
          DecimalTypeUtil.getResultTypeForOperation(
              DecimalTypeUtil.OperationType.ADD, operand1, operand2);
      assertTrue(getDecimal(38, 6).equals(resultType));
    }
  
    @Test
    public void testOutputTypesForMultiply() {
      ArrowType.Decimal operand1 = getDecimal(30, 10);
      ArrowType.Decimal operand2 = getDecimal(30, 10);
      ArrowType.Decimal resultType =
          DecimalTypeUtil.getResultTypeForOperation(
              DecimalTypeUtil.OperationType.MULTIPLY, operand1, operand2);
      assertTrue(getDecimal(38, 6).equals(resultType));
  
      operand1 = getDecimal(38, 10);
      operand2 = getDecimal(9, 2);
      resultType =
          DecimalTypeUtil.getResultTypeForOperation(
              DecimalTypeUtil.OperationType.MULTIPLY, operand1, operand2);
      assertTrue(getDecimal(38, 6).equals(resultType));
    }
  
    @Test
    public void testOutputTypesForMod() {
      ArrowType.Decimal operand1 = getDecimal(30, 10);
      ArrowType.Decimal operand2 = getDecimal(28, 7);
      ArrowType.Decimal resultType =
          DecimalTypeUtil.getResultTypeForOperation(
              DecimalTypeUtil.OperationType.MOD, operand1, operand2);
      assertTrue(getDecimal(30, 10).equals(resultType));
    }
  
    private ArrowType.Decimal getDecimal(int precision, int scale) {
      return new ArrowType.Decimal(precision, scale, 128);
    }
  }
  