/*
* 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.
*/
/**
* author Elena Semukhina
*/
package com.google.gwt.emultest.java.math;
import com.google.gwt.emultest.java.util.EmulTestBase;
import java.math.BigInteger;
/**
* Class: java.math.BigInteger Methods: abs, compareTo, equals, max, min,
* negate, signum.
*/
public class BigIntegerCompareTest extends EmulTestBase {
/**
* abs() for a negative number.
*/
public void testAbsNegative() {
byte aBytes[] = {1, 2, 3, 4, 5, 6, 7};
int aSign = -1;
byte rBytes[] = {1, 2, 3, 4, 5, 6, 7};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.abs();
byte resBytes[] = new byte[rBytes.length];
resBytes = result.toByteArray();
for (int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, result.signum());
}
/**
* abs() for a positive number.
*/
public void testAbsPositive() {
byte aBytes[] = {1, 2, 3, 4, 5, 6, 7};
int aSign = 1;
byte rBytes[] = {1, 2, 3, 4, 5, 6, 7};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.abs();
byte resBytes[] = new byte[rBytes.length];
resBytes = result.toByteArray();
for (int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, result.signum());
}
/**
* compareTo(BigInteger a). Compare two negative numbers. The first is less in
* absolute value.
*/
public void testCompareNegNeg2() {
byte aBytes[] = {10, 20, 30, 40, 50, 60, 70, 10, 20, 30};
byte bBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
int aSign = -1;
int bSign = -1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
assertEquals(1, aNumber.compareTo(bNumber));
}
/**
* compareTo(BigInteger a). Compare two numbers of different signs. The first
* is positive.
*/
public void testCompareToDiffSigns1() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
byte bBytes[] = {10, 20, 30, 40, 50, 60, 70, 10, 20, 30};
int aSign = 1;
int bSign = -1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
assertEquals(1, aNumber.compareTo(bNumber));
}
/**
* compareTo(BigInteger a). Compare two numbers of different signs. The first
* is negative.
*/
public void testCompareToDiffSigns2() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
byte bBytes[] = {10, 20, 30, 40, 50, 60, 70, 10, 20, 30};
int aSign = -1;
int bSign = 1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
assertEquals(-1, aNumber.compareTo(bNumber));
}
/**
* compareTo(BigInteger a). Compare two equal negative numbers.
*/
public void testCompareToEqualNeg() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
byte bBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
int aSign = -1;
int bSign = -1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
assertEquals(0, aNumber.compareTo(bNumber));
}
/**
* compareTo(BigInteger a). Compare two equal positive numbers.
*/
public void testCompareToEqualPos() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
byte bBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
int aSign = 1;
int bSign = 1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
assertEquals(0, aNumber.compareTo(bNumber));
}
/**
* compareTo(BigInteger a). Compare two negative numbers. The first is greater
* in absolute value.
*/
public void testCompareToNegNeg1() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
byte bBytes[] = {10, 20, 30, 40, 50, 60, 70, 10, 20, 30};
int aSign = -1;
int bSign = -1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
assertEquals(-1, aNumber.compareTo(bNumber));
}
/**
* compareTo(BigInteger a). Compare a negative number to ZERO.
*/
public void testCompareToNegZero() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
int aSign = -1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = BigInteger.ZERO;
assertEquals(-1, aNumber.compareTo(bNumber));
}
/**
* compareTo(BigInteger a). Compare two positive numbers. The first is
* greater.
*/
public void testCompareToPosPos1() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
byte bBytes[] = {10, 20, 30, 40, 50, 60, 70, 10, 20, 30};
int aSign = 1;
int bSign = 1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
assertEquals(1, aNumber.compareTo(bNumber));
}
/**
* compareTo(BigInteger a). Compare two positive numbers. The first is less.
*/
public void testCompareToPosPos2() {
byte aBytes[] = {10, 20, 30, 40, 50, 60, 70, 10, 20, 30};
byte bBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
int aSign = 1;
int bSign = 1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
assertEquals(-1, aNumber.compareTo(bNumber));
}
/**
* compareTo(BigInteger a). Compare a positive number to ZERO.
*/
public void testCompareToPosZero() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
int aSign = 1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = BigInteger.ZERO;
assertEquals(1, aNumber.compareTo(bNumber));
}
/**
* compareTo(BigInteger a). Compare ZERO to a negative number.
*/
public void testCompareToZeroNeg() {
byte bBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
int bSign = -1;
BigInteger aNumber = BigInteger.ZERO;
BigInteger bNumber = new BigInteger(bSign, bBytes);
assertEquals(1, aNumber.compareTo(bNumber));
}
/**
* compareTo(BigInteger a). Compare ZERO to a positive number.
*/
public void testCompareToZeroPos() {
byte bBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
int bSign = 1;
BigInteger aNumber = BigInteger.ZERO;
BigInteger bNumber = new BigInteger(bSign, bBytes);
assertEquals(-1, aNumber.compareTo(bNumber));
}
/**
* compareTo(BigInteger a). Compare ZERO to ZERO.
*/
public void testCompareToZeroZero() {
BigInteger aNumber = BigInteger.ZERO;
BigInteger bNumber = BigInteger.ZERO;
assertEquals(0, aNumber.compareTo(bNumber));
}
/**
* equals(Object obj). obj is a BigInteger. numbers are not equal.
*/
public void testEqualsBigIntegerFalse() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
byte bBytes[] = {45, 91, 3, -15, 35, 26, 3, 91};
int aSign = 1;
int bSign = 1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
Object bNumber = new BigInteger(bSign, bBytes);
assertFalse(aNumber.equals(bNumber));
}
/**
* equals(Object obj). obj is a BigInteger. numbers are equal.
*/
public void testEqualsBigIntegerTrue() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
byte bBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
int aSign = 1;
int bSign = 1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
Object bNumber = new BigInteger(bSign, bBytes);
assertTrue(aNumber.equals(bNumber));
}
/**
* equals(null).
*/
public void testEqualsNull() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
int aSign = 1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
assertFalse(aNumber.equals(null));
}
/**
* equals(Object obj). obj is not a BigInteger
*/
public void testEqualsObject() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
int aSign = 1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
Object obj = new Object();
assertFalse(aNumber.equals(obj));
}
/**
* max(BigInteger val). numbers are equal.
*/
public void testMaxEqual() {
byte aBytes[] = {45, 91, 3, -15, 35, 26, 3, 91};
byte bBytes[] = {45, 91, 3, -15, 35, 26, 3, 91};
int aSign = 1;
int bSign = 1;
byte rBytes[] = {45, 91, 3, -15, 35, 26, 3, 91};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.max(bNumber);
byte resBytes[] = new byte[rBytes.length];
resBytes = result.toByteArray();
for (int i = 0; i < resBytes.length; i++) {
assertEquals("Byte " + i, rBytes[i], resBytes[i]);
}
assertEquals("incorrect sign", 1, result.signum());
}
/**
* max(BigInteger val). the first is greater.
*/
public void testMaxGreater() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
byte bBytes[] = {45, 91, 3, -15, 35, 26, 3, 91};
int aSign = 1;
int bSign = 1;
byte rBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.max(bNumber);
byte resBytes[] = new byte[rBytes.length];
resBytes = result.toByteArray();
for (int i = 0; i < resBytes.length; i++) {
assertEquals("Byte " + i, rBytes[i], resBytes[i]);
}
assertTrue("incorrect sign", result.signum() == 1);
result = bNumber.max(aNumber);
assertEquals(aNumber, result);
}
/**
* max(BigInteger val). the first is less.
*/
public void testMaxLess() {
byte aBytes[] = {45, 91, 3, -15, 35, 26, 3, 91};
byte bBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
int aSign = 1;
int bSign = 1;
byte rBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.max(bNumber);
byte resBytes[] = new byte[rBytes.length];
resBytes = result.toByteArray();
for (int i = 0; i < resBytes.length; i++) {
assertEquals("Byte " + i, rBytes[i], resBytes[i]);
}
assertTrue("incorrect sign", result.signum() == 1);
}
/**
* max(BigInteger val). max of negative and ZERO.
*/
public void testMaxNegZero() {
byte aBytes[] = {45, 91, 3, -15, 35, 26, 3, 91};
int aSign = -1;
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = BigInteger.ZERO;
BigInteger result = aNumber.max(bNumber);
byte resBytes[] = new byte[rBytes.length];
resBytes = result.toByteArray();
for (int i = 0; i < resBytes.length; i++) {
assertEquals("Byte " + i, rBytes[i], resBytes[i]);
}
assertTrue("incorrect sign", result.signum() == 0);
}
/**
* min(BigInteger val). numbers are equal.
*/
public void testMinEqual() {
byte aBytes[] = {45, 91, 3, -15, 35, 26, 3, 91};
byte bBytes[] = {45, 91, 3, -15, 35, 26, 3, 91};
int aSign = 1;
int bSign = 1;
byte rBytes[] = {45, 91, 3, -15, 35, 26, 3, 91};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.min(bNumber);
byte resBytes[] = new byte[rBytes.length];
resBytes = result.toByteArray();
for (int i = 0; i < resBytes.length; i++) {
assertEquals("Byte " + i, rBytes[i], resBytes[i]);
}
assertTrue("incorrect sign", result.signum() == 1);
}
/**
* min(BigInteger val). the first is greater.
*/
public void testMinGreater() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
byte bBytes[] = {45, 91, 3, -15, 35, 26, 3, 91};
int aSign = 1;
int bSign = 1;
byte rBytes[] = {45, 91, 3, -15, 35, 26, 3, 91};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.min(bNumber);
byte resBytes[] = new byte[rBytes.length];
resBytes = result.toByteArray();
for (int i = 0; i < resBytes.length; i++) {
assertEquals("Byte " + i, rBytes[i], resBytes[i]);
}
assertEquals("incorrect sign", 1, result.signum());
}
/**
* min(BigInteger val). the first is less.
*/
public void testMinLess() {
byte aBytes[] = {45, 91, 3, -15, 35, 26, 3, 91};
byte bBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
int aSign = 1;
int bSign = 1;
byte rBytes[] = {45, 91, 3, -15, 35, 26, 3, 91};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.min(bNumber);
byte resBytes[] = new byte[rBytes.length];
resBytes = result.toByteArray();
for (int i = 0; i < resBytes.length; i++) {
assertEquals("Byte " + i, rBytes[i], resBytes[i]);
}
assertEquals("incorrect sign", 1, result.signum());
}
/**
* max(BigInteger val). min of positive and ZERO.
*/
public void testMinPosZero() {
byte aBytes[] = {45, 91, 3, -15, 35, 26, 3, 91};
int aSign = 1;
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = BigInteger.ZERO;
BigInteger result = aNumber.min(bNumber);
byte resBytes[] = new byte[rBytes.length];
resBytes = result.toByteArray();
for (int i = 0; i < resBytes.length; i++) {
assertEquals("Byte " + i, rBytes[i], resBytes[i]);
}
assertTrue("incorrect sign", result.signum() == 0);
}
/**
* negate() a negative number.
*/
public void testNegateNegative() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
int aSign = -1;
byte rBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.negate();
byte resBytes[] = new byte[rBytes.length];
resBytes = result.toByteArray();
for (int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
} for (int i = 0; i < resBytes.length; i++) {
assertEquals("Byte " + i, rBytes[i], resBytes[i]);
}
assertTrue("incorrect sign", result.signum() == 1);
}
/**
* negate() a positive number.
*/
public void testNegatePositive() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
int aSign = 1;
byte rBytes[] = {
-13, -57, -101, 1, 75, -90, -46, -92, -4, 14, -36, -27, -4, -91};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.negate();
byte resBytes[] = new byte[rBytes.length];
resBytes = result.toByteArray();
for (int i = 0; i < resBytes.length; i++) {
assertEquals("Byte " + i, rBytes[i], resBytes[i]);
}
assertTrue("incorrect sign", result.signum() == -1);
}
/**
* negate() ZERO.
*/
public void testNegateZero() {
byte rBytes[] = {0};
BigInteger aNumber = BigInteger.ZERO;
BigInteger result = aNumber.negate();
byte resBytes[] = new byte[rBytes.length];
resBytes = result.toByteArray();
for (int i = 0; i < resBytes.length; i++) {
assertEquals("Byte " + i, rBytes[i], resBytes[i]);
}
assertEquals("incorrect sign", 0, result.signum());
}
/**
* signum() of a negative number.
*/
public void testSignumNegative() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
int aSign = -1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
assertEquals("incorrect sign", -1, aNumber.signum());
}
/**
* signum() of a positive number.
*/
public void testSignumPositive() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
int aSign = 1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
assertEquals("incorrect sign", 1, aNumber.signum());
}
/**
* signum() of ZERO.
*/
public void testSignumZero() {
BigInteger aNumber = BigInteger.ZERO;
assertEquals("incorrect sign", 0, aNumber.signum());
}
}