/*
* 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.
*/
/**
* @author Elena Semukhina
*/
package org.apache.harmony.tests.java.math;
import junit.framework.TestCase;
import java.math.BigInteger;
/**
* Class: java.math.BigInteger
* Method: and
*/
public class BigIntegerAndTest extends TestCase {
/**
* And for zero and a positive number
*/
public void testZeroPos() {
byte aBytes[] = {0};
byte bBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
int aSign = 0;
int bSign = 1;
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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", 0, result.signum());
}
/**
* And for zero and a negative number
*/
public void testZeroNeg() {
byte aBytes[] = {0};
byte bBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
int aSign = 0;
int bSign = -1;
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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", 0, result.signum());
}
/**
* And for a positive number and zero
*/
public void testPosZero() {
byte aBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
byte bBytes[] = {0};
int aSign = 1;
int bSign = 0;
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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", 0, result.signum());
}
/**
* And for a negative number and zero
*/
public void testNegPos() {
byte aBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
byte bBytes[] = {0};
int aSign = -1;
int bSign = 0;
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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", 0, result.signum());
}
/**
* And for zero and zero
*/
public void testZeroZero() {
byte aBytes[] = {0};
byte bBytes[] = {0};
int aSign = 0;
int bSign = 0;
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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", 0, result.signum());
}
/**
* And for zero and one
*/
public void testZeroOne() {
BigInteger aNumber = BigInteger.ZERO;
BigInteger bNumber = BigInteger.ONE;
BigInteger result = aNumber.and(bNumber);
assertTrue(result.equals(BigInteger.ZERO));
assertEquals("incorrect sign", 0, result.signum());
}
/**
* And for one and one
*/
public void testOneOne() {
BigInteger aNumber = BigInteger.ONE;
BigInteger bNumber = BigInteger.ONE;
BigInteger result = aNumber.and(bNumber);
assertTrue(result.equals(BigInteger.ONE));
assertEquals("incorrect sign", 1, result.signum());
}
/**
* And for two positive numbers of the same length
*/
public void testPosPosSameLength() {
byte aBytes[] = {-128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117};
byte bBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
int aSign = 1;
int bSign = 1;
byte rBytes[] = {0, -128, 56, 100, 4, 4, 17, 37, 16, 1, 64, 1, 10, 3};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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());
}
/**
* And for two positive numbers; the first is longer
*/
public void testPosPosFirstLonger() {
byte aBytes[] = {-128, 9, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117, 23, 87, -25, -75};
byte bBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
int aSign = 1;
int bSign = 1;
byte rBytes[] = {0, -2, -76, 88, 44, 1, 2, 17, 35, 16, 9, 2, 5, 6, 21};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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());
}
/**
* And for two positive numbers; the first is shorter
*/
public void testPosPosFirstShorter() {
byte aBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
byte bBytes[] = {-128, 9, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117, 23, 87, -25, -75};
int aSign = 1;
int bSign = 1;
byte rBytes[] = {0, -2, -76, 88, 44, 1, 2, 17, 35, 16, 9, 2, 5, 6, 21};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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());
}
/**
* And for two negative numbers of the same length
*/
public void testNegNegSameLength() {
byte aBytes[] = {-128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117};
byte bBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
int aSign = -1;
int bSign = -1;
byte rBytes[] = {-1, 1, 2, 3, 3, 0, 65, -96, -48, -124, -60, 12, -40, -31, 97};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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());
}
/**
* And for two negative numbers; the first is longer
*/
public void testNegNegFirstLonger() {
byte aBytes[] = {-128, 9, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117, 23, 87, -25, -75};
byte bBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
int aSign = -1;
int bSign = -1;
byte rBytes[] = {-1, 127, -10, -57, -101, 1, 2, 2, 2, -96, -16, 8, -40, -59, 68, -88, -88, 16, 73};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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());
}
/**
* And for two negative numbers; the first is shorter
*/
public void testNegNegFirstShorter() {
byte aBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
byte bBytes[] = {-128, 9, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117, 23, 87, -25, -75};
int aSign = -1;
int bSign = -1;
byte rBytes[] = {-1, 127, -10, -57, -101, 1, 2, 2, 2, -96, -16, 8, -40, -59, 68, -88, -88, 16, 73};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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());
}
/**
* And for two numbers of different signs and the same length
*/
public void testPosNegSameLength() {
byte aBytes[] = {-128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117};
byte bBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
int aSign = 1;
int bSign = -1;
byte rBytes[] = {0, -6, -80, 72, 8, 75, 2, -79, 34, 16, -119};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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());
}
/**
* And for two numbers of different signs and the same length
*/
public void testNegPosSameLength() {
byte aBytes[] = {-128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117};
byte bBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
int aSign = -1;
int bSign = 1;
byte rBytes[] = {0, -2, 125, -60, -104, 1, 10, 6, 2, 32, 56, 2, 4, 4, 21};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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());
}
/**
* And for a negative and a positive numbers; the first is longer
*/
public void testNegPosFirstLonger() {
byte aBytes[] = {-128, 9, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117, 23, 87, -25, -75};
byte bBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
int aSign = -1;
int bSign = 1;
byte rBytes[] = {73, -92, -48, 4, 12, 6, 4, 32, 48, 64, 0, 8, 3};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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());
}
/**
* And for a negative and a positive numbers; the first is shorter
*/
public void testNegPosFirstShorter() {
byte aBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
byte bBytes[] = {-128, 9, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117, 23, 87, -25, -75};
int aSign = -1;
int bSign = 1;
byte rBytes[] = {0, -128, 9, 56, 100, 0, 0, 1, 1, 90, 1, -32, 0, 10, -126, 21, 82, -31, -95};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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());
}
/**
* And for a positive and a negative numbers; the first is longer
*/
public void testPosNegFirstLonger() {
byte aBytes[] = {-128, 9, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117, 23, 87, -25, -75};
byte bBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
int aSign = 1;
int bSign = -1;
byte rBytes[] = {0, -128, 9, 56, 100, 0, 0, 1, 1, 90, 1, -32, 0, 10, -126, 21, 82, -31, -95};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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());
}
/**
* And for a positive and a negative numbers; the first is shorter
*/
public void testPosNegFirstShorter() {
byte aBytes[] = {-2, -3, -4, -4, 5, 14, 23, 39, 48, 57, 66, 5, 14, 23};
byte bBytes[] = {-128, 9, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, -117, 23, 87, -25, -75};
int aSign = 1;
int bSign = -1;
byte rBytes[] = {73, -92, -48, 4, 12, 6, 4, 32, 48, 64, 0, 8, 3};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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());
}
/**
* Test for a special case
*/
public void testSpecialCase1() {
byte aBytes[] = {-1, -1, -1, -1};
byte bBytes[] = {5, -4, -3, -2};
int aSign = -1;
int bSign = -1;
byte rBytes[] = {-1, 0, 0, 0, 0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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());
}
/**
* Test for a special case
*/
public void testSpecialCase2() {
byte aBytes[] = {-51};
byte bBytes[] = {-52, -51, -50, -49, -48};
int aSign = -1;
int bSign = 1;
byte rBytes[] = {0, -52, -51, -50, -49, 16};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger bNumber = new BigInteger(bSign, bBytes);
BigInteger result = aNumber.and(bNumber);
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());
}
}