/*
* Copyright 2009 Google Inc.
*
* Licensed 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.
*/
/*
* 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.
*
* INCLUDES MODIFICATIONS BY GOOGLE.
*/
package com.google.gwt.emultest.java.math;
import com.google.gwt.emultest.java.util.EmulTestBase;
import java.math.BigDecimal;
import java.math.BigInteger;
import java.math.MathContext;
import java.math.RoundingMode;
/**
* Class: java.math.BigDecimal Methods: add, subtract, multiply, divide.
*/
public class BigDecimalArithmeticTest extends EmulTestBase {
/**
* Add two numbers of different scales; the first is negative.
*/
public void testAddDiffScaleNegPos() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = -15;
String b = "747233429293018787918347987234564568";
int bScale = 10;
String c = "1231212478987482988429808779810457634781459480137916301878791834798.7234564568";
int cScale = 10;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.add(bNumber);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Add two numbers of different scales; the first is positive.
*/
public void testAddDiffScalePosNeg() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 15;
String b = "747233429293018787918347987234564568";
int bScale = -10;
String c = "7472334294161400358170962860775454459810457634.781384756794987";
int cScale = 15;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.add(bNumber);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Add two numbers of different scales; the first is positive.
*/
public void testAddDiffScalePosPos() {
String a = "100";
int aScale = 15;
String b = "200";
int bScale = 14;
String c = "2.100E-12";
int cScale = 15;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.add(bNumber);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Add two zeroes of different scales; the first is negative.
*/
public void testAddDiffScaleZeroZero() {
String a = "0";
int aScale = -15;
String b = "0";
int bScale = 10;
String c = "0E-10";
int cScale = 10;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.add(bNumber);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Add two numbers of equal negative scales.
*/
public void testAddEqualScaleNegNeg() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = -10;
String b = "747233429293018787918347987234564568";
int bScale = -10;
String c = "1.231212478987483735663238072829245553129371991359555E+61";
int cScale = -10;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.add(bNumber);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Add two numbers of equal positive scales.
*/
public void testAddEqualScalePosPos() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 10;
String b = "747233429293018787918347987234564568";
int bScale = 10;
String c = "123121247898748373566323807282924555312937.1991359555";
int cScale = 10;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.add(bNumber);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Add two numbers of different scales using MathContext; the first is
* positive.
*/
public void testAddMathContextDiffScalePosNeg() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 15;
String b = "747233429293018787918347987234564568";
int bScale = -10;
String c = "7.47233429416141E+45";
int cScale = -31;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
MathContext mc = new MathContext(15, RoundingMode.CEILING);
BigDecimal result = aNumber.add(bNumber, mc);
assertEquals("incorrect value", c, c.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Add two numbers of equal negative scales using MathContext.
*/
public void testAddMathContextEqualScaleNegNeg() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = -10;
String b = "747233429293018787918347987234564568";
int bScale = -10;
String c = "1.2312E+61";
int cScale = -57;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
MathContext mc = new MathContext(5, RoundingMode.FLOOR);
BigDecimal result = aNumber.add(bNumber, mc);
assertEquals("incorrect value ", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Add two numbers of equal positive scales using MathContext.
*/
public void testAddMathContextEqualScalePosPos() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 10;
String b = "747233429293018787918347987234564568";
int bScale = 10;
String c = "1.2313E+41";
int cScale = -37;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
MathContext mc = new MathContext(5, RoundingMode.UP);
BigDecimal result = aNumber.add(bNumber, mc);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
public void testAddZero() {
BigDecimal val = new BigDecimal("123456789");
BigDecimal sum = val.add(BigDecimal.ZERO);
assertEquals(val, sum);
sum = BigDecimal.ZERO.add(val);
assertEquals(val, sum);
val = BigDecimal.valueOf(0L, 1);
sum = val.add(BigDecimal.ZERO);
assertEquals(val, sum);
}
/**
* Test the approximate scale is computed correctly.
* <p>
* See https://issues.apache.org/jira/browse/HARMONY-6406
*/
public void testApproxScale() {
BigDecimal decVal = BigDecimal.TEN.multiply(new BigDecimal("0.1"));
int compare = decVal.compareTo(new BigDecimal("1.00"));
assertEquals(0, compare);
}
/**
* divideAndRemainder(BigDecimal).
*/
public void testDivideAndRemainder1() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 45;
String b = "134432345432345748766876876723342238476237823787879183470";
int bScale = 70;
String res = "277923185514690367474770683";
int resScale = 0;
String rem = "1.3032693871288309587558885943391070087960319452465789990E-15";
int remScale = 70;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result[] = aNumber.divideAndRemainder(bNumber);
assertEquals("incorrect quotient value", res, result[0].toString());
assertEquals("incorrect quotient scale", resScale, result[0].scale());
assertEquals("incorrect remainder value", rem, result[1].toString());
assertEquals("incorrect remainder scale", remScale, result[1].scale());
}
/**
* divideAndRemainder(BigDecimal).
*/
public void testDivideAndRemainder2() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = -45;
String b = "134432345432345748766876876723342238476237823787879183470";
int bScale = 70;
String res = "2779231855146903674747706830969461168692256919247547952"
+ "2608549363170374005512836303475980101168105698072946555" + "6862849";
int resScale = 0;
String rem = "3.4935796954060524114470681810486417234751682675102093970E-15";
int remScale = 70;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result[] = aNumber.divideAndRemainder(bNumber);
assertEquals("incorrect quotient value", res, result[0].toString());
assertEquals("incorrect quotient scale", resScale, result[0].scale());
assertEquals("incorrect remainder value", rem, result[1].toString());
assertEquals("incorrect remainder scale", remScale, result[1].scale());
}
/**
* divideAndRemainder(BigDecimal, MathContext).
*/
public void testDivideAndRemainderMathContextDOWN() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 45;
String b = "134432345432345748766876876723342238476237823787879183470";
int bScale = 20;
int precision = 15;
RoundingMode rm = RoundingMode.DOWN;
MathContext mc = new MathContext(precision, rm);
String res = "0E-25";
int resScale = 25;
String rem = "3736186567876.876578956958765675671119238118911893939591735";
int remScale = 45;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result[] = aNumber.divideAndRemainder(bNumber, mc);
assertEquals("incorrect quotient value", res, result[0].toString());
assertEquals("incorrect quotient scale", resScale, result[0].scale());
assertEquals("incorrect remainder value", rem, result[1].toString());
assertEquals("incorrect remainder scale", remScale, result[1].scale());
}
/**
* divideAndRemainder(BigDecimal, MathContext).
*/
public void testDivideAndRemainderMathContextUP() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 45;
String b = "134432345432345748766876876723342238476237823787879183470";
int bScale = 70;
int precision = 75;
RoundingMode rm = RoundingMode.UP;
MathContext mc = new MathContext(precision, rm);
String res = "277923185514690367474770683";
int resScale = 0;
String rem = "1.3032693871288309587558885943391070087960319452465789990E-15";
int remScale = 70;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result[] = aNumber.divideAndRemainder(bNumber, mc);
assertEquals("incorrect quotient value", res, result[0].toString());
assertEquals("incorrect quotient scale", resScale, result[0].scale());
assertEquals("incorrect remainder value", rem, result[1].toString());
assertEquals("incorrect remainder scale", remScale, result[1].scale());
}
/**
* Divide to BigDecimal.
*/
public void testDivideBigDecimal1() {
String a = "-37361671119238118911893939591735";
int aScale = 10;
String b = "74723342238476237823787879183470";
int bScale = 15;
String c = "-5E+4";
int resScale = -4;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide to BigDecimal.
*/
public void testDivideBigDecimal2() {
String a = "-37361671119238118911893939591735";
int aScale = 10;
String b = "74723342238476237823787879183470";
int bScale = -15;
String c = "-5E-26";
int resScale = 26;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* divide(BigDecimal, MathContext).
*/
public void testDivideBigDecimalScaleMathContextCEILING() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 15;
String b = "748766876876723342238476237823787879183470";
int bScale = 70;
int precision = 21;
RoundingMode rm = RoundingMode.CEILING;
MathContext mc = new MathContext(precision, rm);
String c = "4.98978611802562512996E+70";
int resScale = -50;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, mc);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* divide(BigDecimal, MathContext).
*/
public void testDivideBigDecimalScaleMathContextDOWN() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 15;
String b = "748766876876723342238476237823787879183470";
int bScale = 70;
int precision = 21;
RoundingMode rm = RoundingMode.DOWN;
MathContext mc = new MathContext(precision, rm);
String c = "4.98978611802562512995E+70";
int resScale = -50;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, mc);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* divide(BigDecimal, MathContext).
*/
public void testDivideBigDecimalScaleMathContextFLOOR() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 15;
String b = "748766876876723342238476237823787879183470";
int bScale = 70;
int precision = 21;
RoundingMode rm = RoundingMode.FLOOR;
MathContext mc = new MathContext(precision, rm);
String c = "4.98978611802562512995E+70";
int resScale = -50;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, mc);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* divide(BigDecimal, MathContext).
*/
public void testDivideBigDecimalScaleMathContextHALF_DOWN() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 45;
String b = "134432345432345748766876876723342238476237823787879183470";
int bScale = 70;
int precision = 21;
RoundingMode rm = RoundingMode.HALF_DOWN;
MathContext mc = new MathContext(precision, rm);
String c = "2.77923185514690367475E+26";
int resScale = -6;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, mc);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* divide(BigDecimal, MathContext).
*/
public void testDivideBigDecimalScaleMathContextHALF_EVEN() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 45;
String b = "134432345432345748766876876723342238476237823787879183470";
int bScale = 70;
int precision = 21;
RoundingMode rm = RoundingMode.HALF_EVEN;
MathContext mc = new MathContext(precision, rm);
String c = "2.77923185514690367475E+26";
int resScale = -6;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, mc);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* divide(BigDecimal, MathContext).
*/
public void testDivideBigDecimalScaleMathContextHALF_UP() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 45;
String b = "134432345432345748766876876723342238476237823787879183470";
int bScale = 70;
int precision = 21;
RoundingMode rm = RoundingMode.HALF_UP;
MathContext mc = new MathContext(precision, rm);
String c = "2.77923185514690367475E+26";
int resScale = -6;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, mc);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* divide(BigDecimal, MathContext).
*/
public void testDivideBigDecimalScaleMathContextUP() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 15;
String b = "748766876876723342238476237823787879183470";
int bScale = 10;
int precision = 21;
RoundingMode rm = RoundingMode.UP;
MathContext mc = new MathContext(precision, rm);
String c = "49897861180.2562512996";
int resScale = 10;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, mc);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* divide(BigDecimal, scale, RoundingMode).
*/
public void testDivideBigDecimalScaleRoundingModeCEILING() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 100;
String b = "74723342238476237823787879183470";
int bScale = 15;
int newScale = 45;
RoundingMode rm = RoundingMode.CEILING;
String c = "1E-45";
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, newScale, rm);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", newScale, result.scale());
}
/**
* divide(BigDecimal, scale, RoundingMode).
*/
public void testDivideBigDecimalScaleRoundingModeDOWN() {
String a = "-37361671119238118911893939591735";
int aScale = 10;
String b = "74723342238476237823787879183470";
int bScale = 15;
int newScale = 31;
RoundingMode rm = RoundingMode.DOWN;
String c = "-50000.0000000000000000000000000000000";
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, newScale, rm);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", newScale, result.scale());
}
/**
* divide(BigDecimal, scale, RoundingMode).
*/
public void testDivideBigDecimalScaleRoundingModeFLOOR() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 100;
String b = "74723342238476237823787879183470";
int bScale = 15;
int newScale = 45;
RoundingMode rm = RoundingMode.FLOOR;
String c = "0E-45";
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, newScale, rm);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", newScale, result.scale());
}
/**
* divide(BigDecimal, scale, RoundingMode).
*/
public void testDivideBigDecimalScaleRoundingModeHALF_DOWN() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 5;
String b = "74723342238476237823787879183470";
int bScale = 15;
int newScale = 7;
RoundingMode rm = RoundingMode.HALF_DOWN;
String c = "500002603731642864013619132621009722.1803810";
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, newScale, rm);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", newScale, result.scale());
}
/**
* divide(BigDecimal, scale, RoundingMode).
*/
public void testDivideBigDecimalScaleRoundingModeHALF_EVEN() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 5;
String b = "74723342238476237823787879183470";
int bScale = 15;
int newScale = 7;
RoundingMode rm = RoundingMode.HALF_EVEN;
String c = "500002603731642864013619132621009722.1803810";
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, newScale, rm);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", newScale, result.scale());
}
/**
* divide(BigDecimal, scale, RoundingMode).
*/
public void testDivideBigDecimalScaleRoundingModeHALF_UP() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = -51;
String b = "74723342238476237823787879183470";
int bScale = 45;
int newScale = 3;
RoundingMode rm = RoundingMode.HALF_UP;
String c = "50000260373164286401361913262100972218038099522752460421"
+ "05959924024355721031761947728703598332749334086415670525"
+ "3761096961.670";
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, newScale, rm);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", newScale, result.scale());
}
/**
* divide(BigDecimal, scale, RoundingMode).
*/
public void testDivideBigDecimalScaleRoundingModeUP() {
String a = "-37361671119238118911893939591735";
int aScale = 10;
String b = "74723342238476237823787879183470";
int bScale = -15;
int newScale = 31;
RoundingMode rm = RoundingMode.UP;
String c = "-5.00000E-26";
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, newScale, rm);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", newScale, result.scale());
}
/**
* Divide by zero.
*/
public void testDivideByZero() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 15;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = BigDecimal.valueOf(0L);
try {
aNumber = aNumber.divide(bNumber);
fail("ArithmeticException has not been caught");
} catch (ArithmeticException e) {
assertEquals("Improper exception message", "Division by zero",
e.getMessage());
}
}
/**
* Divide with invalid rounding mode.
*/
public void testDivideExceptionInvalidRM() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 15;
String b = "747233429293018787918347987234564568";
int bScale = 10;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
try {
aNumber = aNumber.divide(bNumber, 100);
fail("IllegalArgumentException has not been caught");
} catch (IllegalArgumentException e) {
assertEquals("Improper exception message", "Invalid rounding mode",
e.getMessage());
}
}
/**
* Divide with ROUND_UNNECESSARY.
*/
public void testDivideExceptionRM() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 15;
String b = "747233429293018787918347987234564568";
int bScale = 10;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
try {
aNumber = aNumber.divide(bNumber, BigDecimal.ROUND_UNNECESSARY);
fail("ArithmeticException has not been caught");
} catch (ArithmeticException e) {
assertEquals("Improper exception message", "Rounding necessary",
e.getMessage());
}
}
/**
* Divide: local variable exponent is equal to zero.
*/
public void testDivideExpEqualsZero() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = -15;
String b = "747233429293018787918347987234564568";
int bScale = 10;
String c = "1.64769459009933764189139568605273529E+40";
int resScale = -5;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_CEILING);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: local variable exponent is greater than zero.
*/
public void testDivideExpGreaterZero() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = -15;
String b = "747233429293018787918347987234564568";
int bScale = 20;
String c = "1.647694590099337641891395686052735285121058381E+50";
int resScale = -5;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_CEILING);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: local variable exponent is less than zero.
*/
public void testDivideExpLessZero() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 15;
String b = "747233429293018787918347987234564568";
int bScale = 10;
String c = "1.64770E+10";
int resScale = -5;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_CEILING);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* BigDecimal.divide with a scale that's too large.
*
* Regression test for HARMONY-6271
*/
public void testDivideLargeScale() {
BigDecimal arg1 = new BigDecimal("320.0E+2147483647");
BigDecimal arg2 = new BigDecimal("6E-2147483647");
try {
arg1 = arg1.divide(arg2, Integer.MAX_VALUE, RoundingMode.CEILING);
fail("Expected ArithmeticException when dividing with a scale that's too large");
} catch (ArithmeticException e) {
// expected behaviour
}
}
/**
* Divide: remainder is zero.
*/
public void testDivideRemainderIsZero() {
String a = "8311389578904553209874735431110";
int aScale = -15;
String b = "237468273682987234567849583746";
int bScale = 20;
String c = "3.5000000000000000000000000000000E+36";
int resScale = -5;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_CEILING);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_CEILING, result is negative.
*/
public void testDivideRoundCeilingNeg() {
String a = "-92948782094488478231212478987482988429808779810457634781384756794987";
int aScale = -24;
String b = "7472334223847623782375469293018787918347987234564568";
int bScale = 13;
String c = "-1.24390557635720517122423359799283E+53";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_CEILING);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_CEILING, result is positive.
*/
public void testDivideRoundCeilingPos() {
String a = "92948782094488478231212478987482988429808779810457634781384756794987";
int aScale = -24;
String b = "7472334223847623782375469293018787918347987234564568";
int bScale = 13;
String c = "1.24390557635720517122423359799284E+53";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_CEILING);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_DOWN, result is negative.
*/
public void testDivideRoundDownNeg() {
String a = "-92948782094488478231212478987482988429808779810457634781384756794987";
int aScale = -24;
String b = "7472334223847623782375469293018787918347987234564568";
int bScale = 13;
String c = "-1.24390557635720517122423359799283E+53";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale, BigDecimal.ROUND_DOWN);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_DOWN, result is positive.
*/
public void testDivideRoundDownPos() {
String a = "92948782094488478231212478987482988429808779810457634781384756794987";
int aScale = -24;
String b = "7472334223847623782375469293018787918347987234564568";
int bScale = 13;
String c = "1.24390557635720517122423359799283E+53";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale, BigDecimal.ROUND_DOWN);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_FLOOR, result is negative.
*/
public void testDivideRoundFloorNeg() {
String a = "-92948782094488478231212478987482988429808779810457634781384756794987";
int aScale = -24;
String b = "7472334223847623782375469293018787918347987234564568";
int bScale = 13;
String c = "-1.24390557635720517122423359799284E+53";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_FLOOR);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_FLOOR, result is positive.
*/
public void testDivideRoundFloorPos() {
String a = "92948782094488478231212478987482988429808779810457634781384756794987";
int aScale = -24;
String b = "7472334223847623782375469293018787918347987234564568";
int bScale = 13;
String c = "1.24390557635720517122423359799283E+53";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_FLOOR);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_HALF_DOWN, result is negative;
* distance = -1.
*/
public void testDivideRoundHalfDownNeg() {
String a = "-92948782094488478231212478987482988429808779810457634781384756794987";
int aScale = -24;
String b = "7472334223847623782375469293018787918347987234564568";
int bScale = 13;
String c = "-1.24390557635720517122423359799284E+53";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_HALF_DOWN);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_HALF_DOWN, result is negative; distance = 1.
*/
public void testDivideRoundHalfDownNeg1() {
String a = "-92948782094488478231212478987482988798104576347813847567949855464535634534563456";
int aScale = -24;
String b = "74723342238476237823754692930187879183479";
int bScale = 13;
String c = "-1.2439055763572051712242335979928354832010167729111113605E+76";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_HALF_DOWN);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_HALF_UP, result is negative; equidistant.
*/
public void testDivideRoundHalfDownNeg2() {
String a = "-37361671119238118911893939591735";
int aScale = 10;
String b = "74723342238476237823787879183470";
int bScale = 15;
String c = "0E+5";
int resScale = -5;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_HALF_DOWN);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_HALF_DOWN, result is positive;
* distance = -1.
*/
public void testDivideRoundHalfDownPos() {
String a = "92948782094488478231212478987482988429808779810457634781384756794987";
int aScale = -24;
String b = "7472334223847623782375469293018787918347987234564568";
int bScale = 13;
String c = "1.24390557635720517122423359799284E+53";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_HALF_DOWN);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_HALF_DOWN, result is positive; distance = 1.
*/
public void testDivideRoundHalfDownPos1() {
String a = "92948782094488478231212478987482988798104576347813847567949855464535634534563456";
int aScale = -24;
String b = "74723342238476237823754692930187879183479";
int bScale = 13;
String c = "1.2439055763572051712242335979928354832010167729111113605E+76";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_HALF_DOWN);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_HALF_EVEN, result is negative;
* distance = -1.
*/
public void testDivideRoundHalfEvenNeg() {
String a = "-92948782094488478231212478987482988429808779810457634781384756794987";
int aScale = -24;
String b = "7472334223847623782375469293018787918347987234564568";
int bScale = 13;
String c = "-1.24390557635720517122423359799284E+53";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_HALF_EVEN);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_HALF_EVEN, result is negative; distance = 1.
*/
public void testDivideRoundHalfEvenNeg1() {
String a = "-92948782094488478231212478987482988798104576347813847567949855464535634534563456";
int aScale = -24;
String b = "74723342238476237823754692930187879183479";
int bScale = 13;
String c = "-1.2439055763572051712242335979928354832010167729111113605E+76";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_HALF_EVEN);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_HALF_EVEN, result is negative; equidistant.
*/
public void testDivideRoundHalfEvenNeg2() {
String a = "-37361671119238118911893939591735";
int aScale = 10;
String b = "74723342238476237823787879183470";
int bScale = 15;
String c = "0E+5";
int resScale = -5;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_HALF_EVEN);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_HALF_EVEN, result is positive; distance = -1.
*/
public void testDivideRoundHalfEvenPos() {
String a = "92948782094488478231212478987482988429808779810457634781384756794987";
int aScale = -24;
String b = "7472334223847623782375469293018787918347987234564568";
int bScale = 13;
String c = "1.24390557635720517122423359799284E+53";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_HALF_EVEN);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_HALF_EVEN, result is positive; distance = 1.
*/
public void testDivideRoundHalfEvenPos1() {
String a = "92948782094488478231212478987482988798104576347813847567949855464535634534563456";
int aScale = -24;
String b = "74723342238476237823754692930187879183479";
int bScale = 13;
String c = "1.2439055763572051712242335979928354832010167729111113605E+76";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_HALF_EVEN);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_HALF_UP, result is negative; distance = -1.
*/
public void testDivideRoundHalfUpNeg() {
String a = "-92948782094488478231212478987482988429808779810457634781384756794987";
int aScale = -24;
String b = "7472334223847623782375469293018787918347987234564568";
int bScale = 13;
String c = "-1.24390557635720517122423359799284E+53";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_HALF_UP);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_HALF_UP, result is negative; distance = 1.
*/
public void testDivideRoundHalfUpNeg1() {
String a = "-92948782094488478231212478987482988798104576347813847567949855464535634534563456";
int aScale = -24;
String b = "74723342238476237823754692930187879183479";
int bScale = 13;
String c = "-1.2439055763572051712242335979928354832010167729111113605E+76";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_HALF_UP);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_HALF_UP, result is negative; equidistant.
*/
public void testDivideRoundHalfUpNeg2() {
String a = "-37361671119238118911893939591735";
int aScale = 10;
String b = "74723342238476237823787879183470";
int bScale = 15;
String c = "-1E+5";
int resScale = -5;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_HALF_UP);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_HALF_UP, result is positive; distance = -1.
*/
public void testDivideRoundHalfUpPos() {
String a = "92948782094488478231212478987482988429808779810457634781384756794987";
int aScale = -24;
String b = "7472334223847623782375469293018787918347987234564568";
int bScale = 13;
String c = "1.24390557635720517122423359799284E+53";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_HALF_UP);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_HALF_UP, result is positive; distance = 1.
*/
public void testDivideRoundHalfUpPos1() {
String a = "92948782094488478231212478987482988798104576347813847567949855464535634534563456";
int aScale = -24;
String b = "74723342238476237823754692930187879183479";
int bScale = 13;
String c = "1.2439055763572051712242335979928354832010167729111113605E+76";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale,
BigDecimal.ROUND_HALF_UP);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_UP, result is negative.
*/
public void testDivideRoundUpNeg() {
String a = "-92948782094488478231212478987482988429808779810457634781384756794987";
int aScale = -24;
String b = "7472334223847623782375469293018787918347987234564568";
int bScale = 13;
String c = "-1.24390557635720517122423359799284E+53";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale, BigDecimal.ROUND_UP);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* Divide: rounding mode is ROUND_UP, result is positive.
*/
public void testDivideRoundUpPos() {
String a = "92948782094488478231212478987482988429808779810457634781384756794987";
int aScale = -24;
String b = "7472334223847623782375469293018787918347987234564568";
int bScale = 13;
String c = "1.24390557635720517122423359799284E+53";
int resScale = -21;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divide(bNumber, resScale, BigDecimal.ROUND_UP);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
public void testDivideSmall() {
BigDecimal a = BigDecimal.valueOf(6);
BigDecimal b = BigDecimal.valueOf(2);
BigDecimal quotient = a.divide(b);
assertEquals("3", quotient.toString());
quotient = a.divideToIntegralValue(b);
assertEquals("3", quotient.toString());
quotient = a.divide(BigDecimal.ONE);
assertEquals("6", quotient.toString());
quotient = a.divide(BigDecimal.ONE.negate());
assertEquals("-6", quotient.toString());
}
/**
* divideToIntegralValue(BigDecimal).
*/
public void testDivideToIntegralValue() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 45;
String b = "134432345432345748766876876723342238476237823787879183470";
int bScale = 70;
String c = "277923185514690367474770683";
int resScale = 0;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divideToIntegralValue(bNumber);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* divideToIntegralValue(BigDecimal, MathContext).
*/
public void testDivideToIntegralValueMathContextDOWN() {
String a = "3736186567876876578956958769675785435673453453653543654354365435675671119238118911893939591735";
int aScale = 45;
String b = "134432345432345748766876876723342238476237823787879183470";
int bScale = 70;
int precision = 75;
RoundingMode rm = RoundingMode.DOWN;
MathContext mc = new MathContext(precision, rm);
String c = "2.7792318551469036747477068339450205874992634417590178670822889E+62";
int resScale = -1;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divideToIntegralValue(bNumber, mc);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* divideToIntegralValue(BigDecimal, MathContext).
*/
public void testDivideToIntegralValueMathContextUP() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 45;
String b = "134432345432345748766876876723342238476237823787879183470";
int bScale = 70;
int precision = 32;
RoundingMode rm = RoundingMode.UP;
MathContext mc = new MathContext(precision, rm);
String c = "277923185514690367474770683";
int resScale = 0;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.divideToIntegralValue(bNumber, mc);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
public void testDivideZero() {
BigDecimal quotient = BigDecimal.ZERO.divide(BigDecimal.ONE);
assertEquals(BigDecimal.ZERO, quotient);
quotient = BigDecimal.ZERO.negate().divide(BigDecimal.ONE);
assertEquals(BigDecimal.ZERO, quotient);
try {
quotient = BigDecimal.ZERO.divide(BigDecimal.ZERO);
fail("Expected ArithmeticException, divide by zero");
} catch (ArithmeticException expected) {
}
assertEquals(BigDecimal.ZERO, quotient);
try {
quotient = BigDecimal.ONE.divide(BigDecimal.ZERO);
fail("Expected ArithmeticException, divide by zero");
} catch (ArithmeticException expected) {
}
try {
quotient = BigDecimal.ONE.divideToIntegralValue(BigDecimal.ZERO);
fail("Expected ArithmeticException, divide by zero");
} catch (ArithmeticException expected) {
}
}
/**
* Multiply two numbers of different scales.
*/
public void testMultiplyDiffScaleNegPos() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = -15;
String b = "747233429293018787918347987234564568";
int bScale = 10;
String c = "9.20003122862175749786430095741145455670101391569026662845893091880727173060570190220616E+91";
int cScale = -5;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.multiply(bNumber);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Multiply two numbers of different scales.
*/
public void testMultiplyDiffScalePosNeg() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 10;
String b = "747233429293018787918347987234564568";
int bScale = -10;
String c = "920003122862175749786430095741145455670101391569026662845893091880727173060570190220616";
int cScale = 0;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.multiply(bNumber);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Multiply two numbers of negative scales.
*/
public void testMultiplyEqualScaleNegNeg() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = -15;
String b = "747233429293018787918347987234564568";
int bScale = -10;
String c = "9.20003122862175749786430095741145455670101391569026662845893091880727173060570190220616E+111";
int cScale = -25;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.multiply(bNumber);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Multiply two numbers of different scales using MathContext.
*/
public void testMultiplyMathContextDiffScaleNegPos() {
String a = "488757458676796558668876576576579097029810457634781384756794987";
int aScale = -63;
String b = "747233429293018787918347987234564568";
int bScale = 63;
String c = "3.6521591193960361339707130098174381429788164316E+98";
int cScale = -52;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
MathContext mc = new MathContext(47, RoundingMode.HALF_UP);
BigDecimal result = aNumber.multiply(bNumber, mc);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Multiply two numbers of different scales using MathContext.
*/
public void testMultiplyMathContextDiffScalePosNeg() {
String a = "987667796597975765768768767866756808779810457634781384756794987";
int aScale = 100;
String b = "747233429293018787918347987234564568";
int bScale = -70;
String c = "7.3801839465418518653942222612429081498248509257207477E+68";
int cScale = -16;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
MathContext mc = new MathContext(53, RoundingMode.HALF_UP);
BigDecimal result = aNumber.multiply(bNumber, mc);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Multiply two numbers of positive scales using MathContext.
*/
public void testMultiplyMathContextScalePosPos() {
String a = "97665696756578755423325476545428779810457634781384756794987";
int aScale = -25;
String b = "87656965586786097685674786576598865";
int bScale = 10;
String c = "8.561078619600910561431314228543672720908E+108";
int cScale = -69;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
MathContext mc = new MathContext(40, RoundingMode.HALF_DOWN);
BigDecimal result = aNumber.multiply(bNumber, mc);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Multiply two numbers of positive scales.
*/
public void testMultiplyScalePosPos() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 15;
String b = "747233429293018787918347987234564568";
int bScale = 10;
String c = "92000312286217574978643009574114545567010139156902666284589309.1880727173060570190220616";
int cScale = 25;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.multiply(bNumber);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* pow(int).
*/
public void testPow() {
String a = "123121247898748298842980";
int aScale = 10;
int exp = 10;
String c = "8004424019039195734129783677098845174704975003788210729597"
+ "4875206425711159855030832837132149513512555214958035390490"
+ "798520842025826.594316163502809818340013610490541783276343"
+ "6514490899700151256484355936102754469438371850240000000000";
int cScale = 100;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal result = aNumber.pow(exp);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* pow(0).
*/
public void testPow0() {
String a = "123121247898748298842980";
int aScale = 10;
int exp = 0;
String c = "1";
int cScale = 0;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal result = aNumber.pow(exp);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* pow(int, MathContext).
*/
public void testPowMathContext() {
String a = "123121247898748298842980";
int aScale = 10;
int exp = 10;
String c = "8.0044E+130";
int cScale = -126;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
MathContext mc = new MathContext(5, RoundingMode.HALF_UP);
BigDecimal result = aNumber.pow(exp, mc);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* remainder(BigDecimal).
*/
public void testRemainder1() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 45;
String b = "134432345432345748766876876723342238476237823787879183470";
int bScale = 10;
String res = "3736186567876.876578956958765675671119238118911893939591735";
int resScale = 45;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.remainder(bNumber);
assertEquals("incorrect quotient value", res, result.toString());
assertEquals("incorrect quotient scale", resScale, result.scale());
}
/**
* remainder(BigDecimal).
*/
public void testRemainder2() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = -45;
String b = "134432345432345748766876876723342238476237823787879183470";
int bScale = 10;
String res = "1149310942946292909508821656680979993738625937.2065885780";
int resScale = 10;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.remainder(bNumber);
assertEquals("incorrect quotient value", res, result.toString());
assertEquals("incorrect quotient scale", resScale, result.scale());
}
/**
* remainder(BigDecimal, MathContext).
*/
public void testRemainderMathContextHALF_DOWN() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = -45;
String b = "134432345432345748766876876723342238476237823787879183470";
int bScale = 10;
int precision = 75;
RoundingMode rm = RoundingMode.HALF_DOWN;
MathContext mc = new MathContext(precision, rm);
String res = "1149310942946292909508821656680979993738625937.2065885780";
int resScale = 10;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.remainder(bNumber, mc);
assertEquals("incorrect quotient value", res, result.toString());
assertEquals("incorrect quotient scale", resScale, result.scale());
}
/**
* remainder(BigDecimal, MathContext).
*/
public void testRemainderMathContextHALF_UP() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 45;
String b = "134432345432345748766876876723342238476237823787879183470";
int bScale = 10;
int precision = 15;
RoundingMode rm = RoundingMode.HALF_UP;
MathContext mc = new MathContext(precision, rm);
String res = "3736186567876.876578956958765675671119238118911893939591735";
int resScale = 45;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.remainder(bNumber, mc);
assertEquals("incorrect quotient value", res, result.toString());
assertEquals("incorrect quotient scale", resScale, result.scale());
}
/**
* Test gwt-java-math issues 4 and 5.
*/
public void testRoundMathContextCEILING() {
BigDecimal val = BigDecimal.valueOf(1.5);
BigDecimal result = val.round(new MathContext(1, RoundingMode.CEILING));
assertEquals("2", result.toString());
assertEquals(0, result.scale());
assertEquals(1, result.precision());
// 1 digit left of dp, 14 scale + 1
val = BigDecimal.valueOf(5.43445663479765);
val =
val.setScale(val.scale() + 1, RoundingMode.CEILING).round(new
MathContext(1, RoundingMode.CEILING));
// 1 digit left of dp, 13 scale + 2
val = BigDecimal.valueOf(5.4344566347976);
val =
val.setScale(val.scale() + 2, RoundingMode.CEILING).round(new
MathContext(1, RoundingMode.CEILING));
// 2 digits left of dp, 13 scale + 2
BigDecimal test = BigDecimal.valueOf(12.4344566347976);
test =
test.setScale(test.scale() + 1, RoundingMode.CEILING).round(new
MathContext(1, RoundingMode.CEILING));
}
/**
* round(BigDecimal, MathContext).
*/
public void testRoundMathContextHALF_DOWN() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = -45;
int precision = 75;
RoundingMode rm = RoundingMode.HALF_DOWN;
MathContext mc = new MathContext(precision, rm);
String res = "3.736186567876876578956958765675671119238118911893939591735E+102";
int resScale = -45;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal result = aNumber.round(mc);
assertEquals("incorrect quotient value", res, result.toString());
assertEquals("incorrect quotient scale", resScale, result.scale());
}
/**
* round(BigDecimal, MathContext).
*/
public void testRoundMathContextHALF_UP() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 45;
int precision = 15;
RoundingMode rm = RoundingMode.HALF_UP;
MathContext mc = new MathContext(precision, rm);
String res = "3736186567876.88";
int resScale = 2;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal result = aNumber.round(mc);
assertEquals("incorrect quotient value", res, result.toString());
assertEquals("incorrect quotient scale", resScale, result.scale());
}
/**
* round(BigDecimal, MathContext) when precision = 0.
*/
public void testRoundMathContextPrecision0() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = 45;
int precision = 0;
RoundingMode rm = RoundingMode.HALF_UP;
MathContext mc = new MathContext(precision, rm);
String res = "3736186567876.876578956958765675671119238118911893939591735";
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal result = aNumber.round(mc);
assertEquals("incorrect quotient value", res, result.toString());
assertEquals("incorrect quotient scale", aScale, result.scale());
}
/**
* Subtract two numbers of different scales; the first is negative.
*/
public void testSubtractDiffScaleNegPos() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = -15;
String b = "747233429293018787918347987234564568";
int bScale = 10;
String c = "1231212478987482988429808779810457634781310033452057698121208165201.2765435432";
int cScale = 10;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.subtract(bNumber);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Subtract two numbers of different scales; the first is positive.
*/
public void testSubtractDiffScalePosNeg() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 15;
String b = "747233429293018787918347987234564568";
int bScale = -10;
String c = "-7472334291698975400195996883915836900189542365.218615243205013";
int cScale = 15;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.subtract(bNumber);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Subtract two numbers of equal negative scales.
*/
public void testSubtractEqualScaleNegNeg() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = -10;
String b = "747233429293018787918347987234564568";
int bScale = -10;
String c = "1.231212478987482241196379486791669716433397522230419E+61";
int cScale = -10;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.subtract(bNumber);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Subtract two numbers of equal positive scales.
*/
public void testSubtractEqualScalePosPos() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 10;
String b = "747233429293018787918347987234564568";
int bScale = 10;
String c = "123121247898748224119637948679166971643339.7522230419";
int cScale = 10;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
BigDecimal result = aNumber.subtract(bNumber);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Subtract two numbers of different scales using MathContext; the first is
* negative.
*/
public void testSubtractMathContextDiffScaleNegPos() {
String a = "986798656676789766678767876078779810457634781384756794987";
int aScale = -15;
String b = "747233429293018787918347987234564568";
int bScale = 40;
String c = "9.867986566767897666787678760787798104576347813847567949870000000000000E+71";
int cScale = -2;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
MathContext mc = new MathContext(70, RoundingMode.HALF_DOWN);
BigDecimal result = aNumber.subtract(bNumber, mc);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Subtract two numbers of different scales using MathContext; the first is
* positive.
*/
public void testSubtractMathContextDiffScalePosNeg() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 15;
String b = "747233429293018787918347987234564568";
int bScale = -10;
String c = "-7.4723342916989754E+45";
int cScale = -29;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
MathContext mc = new MathContext(17, RoundingMode.DOWN);
BigDecimal result = aNumber.subtract(bNumber, mc);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* Subtract two numbers of equal positive scales using MathContext.
*/
public void testSubtractMathContextEqualScalePosPos() {
String a = "1231212478987482988429808779810457634781384756794987";
int aScale = 10;
String b = "747233429293018787918347987234564568";
int bScale = 10;
String c = "1.23121247898749E+41";
int cScale = -27;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal bNumber = new BigDecimal(new BigInteger(b), bScale);
MathContext mc = new MathContext(15, RoundingMode.CEILING);
BigDecimal result = aNumber.subtract(bNumber, mc);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
/**
* ulp() of a negative BigDecimal.
*/
public void testUlpNeg() {
String a = "-3736186567876876578956958765675671119238118911893939591735";
int aScale = 45;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal result = aNumber.ulp();
String res = "1E-45";
int resScale = 45;
assertEquals("incorrect value", res, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* ulp() of a positive BigDecimal.
*/
public void testUlpPos() {
String a = "3736186567876876578956958765675671119238118911893939591735";
int aScale = -45;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal result = aNumber.ulp();
String res = "1E+45";
int resScale = -45;
assertEquals("incorrect value", res, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* ulp() of a negative BigDecimal.
*/
public void testUlpZero() {
String a = "0";
int aScale = 2;
BigDecimal aNumber = new BigDecimal(new BigInteger(a), aScale);
BigDecimal result = aNumber.ulp();
String res = "0.01";
int resScale = 2;
assertEquals("incorrect value", res, result.toString());
assertEquals("incorrect scale", resScale, result.scale());
}
/**
* ZERO.pow(0).
*/
public void testZeroPow0() {
String c = "1";
int cScale = 0;
BigDecimal result = BigDecimal.ZERO.pow(0);
assertEquals("incorrect value", c, result.toString());
assertEquals("incorrect scale", cScale, result.scale());
}
}