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package org.apache.velocity.test;
/*
* 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.
*/
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
import org.apache.velocity.runtime.parser.node.MathUtils;
import java.math.BigDecimal;
import java.math.BigInteger;
/**
* Test arithmetic operations. Introduced after extending from Integer-only
* to Number-handling.
*
* @author <a href="mailto:pero@antaramusic.de">Peter Romianowski</a>
*/
public class ArithmeticTestCase extends TestCase
{
public ArithmeticTestCase(String testName)
{
super(testName);
}
public static Test suite()
{
return new TestSuite(ArithmeticTestCase.class);
}
public void testAdd()
{
addHelper (10, (short) 20, 30, Integer.class);
addHelper ((byte) 10, (short) 20, 30, Short.class);
addHelper (10f, (short) 20, 30, Float.class);
addHelper ((byte) 10, 20d, 30, Double.class);
addHelper (BigInteger.valueOf(10), 20, 30, BigInteger.class);
addHelper (20, BigDecimal.valueOf(10), 30, BigDecimal.class);
// Test overflow
addHelper (Integer.MAX_VALUE, (short) 20, (double)Integer.MAX_VALUE+20, Long.class);
addHelper (20, Long.MAX_VALUE, (double)Long.MAX_VALUE+20, BigInteger.class);
addHelper (-20, Long.MIN_VALUE, (double)Long.MIN_VALUE-20, BigInteger.class);
}
private void addHelper (Number n1, Number n2, double expectedResult, Class expectedResultType)
{
Number result = MathUtils.add( n1, n2);
assertEquals("The arithmetic operation produced an unexpected result.", expectedResult, result.doubleValue(), 0.01);
assertEquals("ResultType does not match.", expectedResultType, result.getClass());
}
public void testSubtract()
{
subtractHelper (100, (short) 20, 80, Integer.class);
subtractHelper ((byte) 100, (short) 20, 80, Short.class);
subtractHelper (100f, (short) 20, 80, Float.class);
subtractHelper ((byte) 100, 20d, 80, Double.class);
subtractHelper (BigInteger.valueOf(100), 20, 80, BigInteger.class);
subtractHelper (100, BigDecimal.valueOf(20), 80, BigDecimal.class);
// Test overflow
subtractHelper (Integer.MIN_VALUE, (short) 20, (double)Integer.MIN_VALUE-20, Long.class);
subtractHelper(-20, Long.MAX_VALUE, -20d - (double) Long.MAX_VALUE, BigInteger.class);
subtractHelper(Integer.MAX_VALUE, Long.MIN_VALUE, (double) Long.MAX_VALUE + (double) Integer.MAX_VALUE, BigInteger.class);
}
private void subtractHelper (Number n1, Number n2, double expectedResult, Class expectedResultType)
{
Number result = MathUtils.subtract( n1, n2);
assertEquals("The arithmetic operation produced an unexpected result.", expectedResult, result.doubleValue(), 0.01);
assertEquals("ResultType does not match.", expectedResultType, result.getClass());
}
public void testMultiply()
{
multiplyHelper (10, (short) 20, 200, Integer.class);
multiplyHelper ((byte) 100, (short) 20, 2000, Short.class);
multiplyHelper ((byte) 100, (short) 2000, 200000, Integer.class);
multiplyHelper (100f, (short) 20, 2000, Float.class);
multiplyHelper ((byte) 100, 20d, 2000, Double.class);
multiplyHelper (BigInteger.valueOf(100), 20, 2000, BigInteger.class);
multiplyHelper (100, BigDecimal.valueOf(20), 2000, BigDecimal.class);
// Test overflow
multiplyHelper (Integer.MAX_VALUE, (short) 10, (double)Integer.MAX_VALUE*10d, Long.class);
multiplyHelper(Integer.MAX_VALUE, (short) -10, (double) Integer.MAX_VALUE * -10d, Long.class);
multiplyHelper(20, Long.MAX_VALUE, 20d * (double) Long.MAX_VALUE, BigInteger.class);
}
private void multiplyHelper (Number n1, Number n2, double expectedResult, Class expectedResultType)
{
Number result = MathUtils.multiply( n1, n2);
assertEquals("The arithmetic operation produced an unexpected result.", expectedResult, result.doubleValue(), 0.01);
assertEquals("ResultType does not match.", expectedResultType, result.getClass());
}
public void testDivide()
{
divideHelper (10, (short) 2, 5, Integer.class);
divideHelper ((byte) 10, (short) 2, 5, Short.class);
divideHelper (BigInteger.valueOf(10), (short) 2, 5, BigInteger.class);
divideHelper (10, (short) 4, 2, Integer.class);
divideHelper (10, 2.5f, 4, Float.class);
divideHelper(10, 2.5, 4, Double.class);
divideHelper(10, new BigDecimal(2.5), 4, BigDecimal.class);
}
private void divideHelper (Number n1, Number n2, double expectedResult, Class expectedResultType)
{
Number result = MathUtils.divide( n1, n2);
assertEquals("The arithmetic operation produced an unexpected result.", expectedResult, result.doubleValue(), 0.01);
assertEquals("ResultType does not match.", expectedResultType, result.getClass());
}
public void testModulo()
{
moduloHelper (10, (short) 2, 0, Integer.class);
moduloHelper ((byte) 10, (short) 3, 1, Short.class);
moduloHelper(BigInteger.valueOf(10), (short) 4, 2, BigInteger.class);
moduloHelper(10, 5.5f, 4.5, Float.class);
try
{
moduloHelper (10, new BigDecimal( 2.5), 4, BigDecimal.class);
fail ("Modulo with BigDecimal is not allowed! Should have thrown an ArithmeticException.");
}
catch( ArithmeticException e)
{
// do nothing
}
}
private void moduloHelper (Number n1, Number n2, double expectedResult, Class expectedResultType)
{
Number result = MathUtils.modulo( n1, n2);
assertEquals("The arithmetic operation produced an unexpected result.", expectedResult, result.doubleValue(), 0.01);
assertEquals("ResultType does not match.", expectedResultType, result.getClass());
}
public void testCompare()
{
compareHelper (10, (short) 10, 0);
compareHelper (10, (short) 11, -1);
compareHelper (BigInteger.valueOf(10), (short) 11, -1);
compareHelper ((byte) 10, (short) 3, 1);
compareHelper(10f, (short) 11, -1);
compareHelper(10d, (short) 11, -1);
}
private void compareHelper (Number n1, Number n2, int expectedResult)
{
int result = MathUtils.compare( n1, n2 );
assertEquals("The arithmetic operation produced an unexpected result.", expectedResult, result);
}
public void testNegate()
{
negateHelper((byte) 1, -1, Byte.class);
negateHelper((short) 1, -1, Short.class);
negateHelper(1, -1, Integer.class);
negateHelper(1L, -1, Long.class);
negateHelper(BigInteger.valueOf(1), -1, BigInteger.class);
negateHelper(BigDecimal.valueOf(1), -1, BigDecimal.class);
negateHelper(Long.MIN_VALUE, BigInteger.valueOf(Long.MAX_VALUE).add(BigInteger.valueOf(1)).doubleValue(), BigInteger.class);
}
private void negateHelper(Number n, double expectedResult, Class expectedResultType)
{
Number result = MathUtils.negate(n);
assertEquals ("The arithmetic operation produced an unexpected result.", expectedResult, result.doubleValue(), 0.01);
assertEquals ("ResultType does not match.", expectedResultType, result.getClass());
}
/*
*
* COMMENT OUT FOR PERFORMANCE-MEASSUREMENTS
*
* public void testProfile()
* {
*
* long start = System.currentTimeMillis();
*
* Number v1 = new Long (1000);
* Number v2 = new Double (10.23);
* Number result = null;
* for (int a = 0; a < 10000; a++)
* {
*
* result = MathUtils.typeConvert (
* new BigDecimal (v1.doubleValue()).add (
* new BigDecimal (v2.doubleValue())), v1, v2, false);
*
* }
*
* System.out.println ("took: "+(System.currentTimeMillis()-start));
*
* start = System.currentTimeMillis();
* for (int a = 0; a < 10000; a++)
* {
*
* result = MathUtils.divide( v1, v2);
* }
*
* Number result2 = result;
* System.out.println ("took: "+(System.currentTimeMillis()-start));
* }
*
*/
/**
* Test additional functions
*/
public void testIsZero()
{
assertTrue (MathUtils.isZero (0));
assertTrue (!MathUtils.isZero (1));
assertTrue (!MathUtils.isZero (-1));
assertTrue (MathUtils.isZero (0f));
assertTrue (!MathUtils.isZero (0.00001f));
assertTrue (!MathUtils.isZero (-0.00001f));
}
}
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