/*
* 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: bitLength, shiftLeft, shiftRight,
* clearBit, flipBit, setBit, testBit.
*/
public class BigIntegerOperateBitsTest extends EmulTestBase {
/**
* bitCount() of a negative number.
*/
public void testBitCountNeg() {
BigInteger aNumber = new BigInteger(
"-12378634756382937873487638746283767238657872368748726875");
assertEquals(87, aNumber.bitCount());
}
/**
* bitCount() of a negative number.
*/
public void testBitCountPos() {
BigInteger aNumber = new BigInteger(
"12378634756343564757582937873487638746283767238657872368748726875");
assertEquals(107, aNumber.bitCount());
}
/**
* bitCount() of zero.
*/
public void testBitCountZero() {
BigInteger aNumber = new BigInteger("0");
assertEquals(0, aNumber.bitCount());
}
/**
* bitLength() of a negative number.
*/
public void testBitLengthNegative1() {
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(108, aNumber.bitLength());
}
/**
* bitLength() of a negative number with the leftmost bit set.
*/
public void testBitLengthNegative2() {
byte aBytes[] = {-128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = -1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
assertEquals(96, aNumber.bitLength());
}
/**
* bitLength() of a negative number which is a power of 2.
*/
public void testBitLengthNegative3() {
byte aBytes[] = {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
int aSign = -1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
assertEquals(80, aNumber.bitLength());
}
/**
* bitLength() of a positive number.
*/
public void testBitLengthPositive1() {
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(108, aNumber.bitLength());
}
/**
* bitLength() of a positive number with the leftmost bit set.
*/
public void testBitLengthPositive2() {
byte aBytes[] = {-128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
assertEquals(96, aNumber.bitLength());
}
/**
* bitLength() of a positive number which is a power of 2.
*/
public void testBitLengthPositive3() {
byte aBytes[] = {1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
int aSign = 1;
BigInteger aNumber = new BigInteger(aSign, aBytes);
assertEquals(81, aNumber.bitLength());
}
/**
* bitLength() of zero.
*/
public void testBitLengthZero() {
BigInteger aNumber = new BigInteger("0");
assertEquals(0, aNumber.bitLength());
}
/**
* clearBit(int n) of a negative n.
*/
public void testClearBitException() {
byte aBytes[] = {-1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = -7;
BigInteger aNumber = new BigInteger(aSign, aBytes);
try {
aNumber.clearBit(number);
fail("ArithmeticException has not been caught");
} catch (ArithmeticException e) {
assertEquals("Improper exception message", "Negative bit address",
e.getMessage());
}
}
/**
* clearBit(int n) inside a negative number.
*/
public void testClearBitNegativeInside1() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = -1;
int number = 15;
byte rBytes[] = {-2, 127, -57, -101, 1, 75, -90, -46, -92, -4, 14, 92, -26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.clearBit(number);
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());
}
/**
* clearBit(int n) inside a negative number.
*/
public void testClearBitNegativeInside2() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = -1;
int number = 44;
byte rBytes[] = {-2, 127, -57, -101, 1, 75, -90, -62, -92, -4, 14, -36, -26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.clearBit(number);
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());
}
/**
* clearBit(2) in the negative number with all ones in bit representation.
*/
public void testClearBitNegativeInside3() {
String as = "-18446744073709551615";
int number = 2;
BigInteger aNumber = new BigInteger(as);
BigInteger result = aNumber.clearBit(number);
assertEquals(as, result.toString());
}
/**
* clearBit(0) in the negative number of length 1 with all ones in bit
* representation. the resulting number's length is 2.
*/
public void testClearBitNegativeInside4() {
String as = "-4294967295";
String res = "-4294967296";
int number = 0;
BigInteger aNumber = new BigInteger(as);
BigInteger result = aNumber.clearBit(number);
assertEquals(res, result.toString());
}
/**
* clearBit(0) in the negative number of length 2 with all ones in bit
* representation. the resulting number's length is 3.
*/
public void testClearBitNegativeInside5() {
String as = "-18446744073709551615";
String res = "-18446744073709551616";
int number = 0;
BigInteger aNumber = new BigInteger(as);
BigInteger result = aNumber.clearBit(number);
assertEquals(res, result.toString());
}
/**
* clearBit(int n) outside a negative number.
*/
public void testClearBitNegativeOutside1() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = -1;
int number = 150;
byte rBytes[] = {
-65, -1, -1, -1, -1, -1, -2, 127, -57, -101, 1, 75, -90, -46, -92, -4,
14, -36, -26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.clearBit(number);
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());
}
/**
* clearBit(int n) outside a negative number.
*/
public void testClearBitNegativeOutside2() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = -1;
int number = 165;
byte rBytes[] = {
-33, -1, -1, -1, -1, -1, -1, -1, -2, 127, -57, -101, 1, 75, -90, -46,
-92, -4, 14, -36, -26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.clearBit(number);
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());
}
/**
* clearBit(int n) inside a positive number.
*/
public void testClearBitPositiveInside1() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 20;
byte rBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -31, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.clearBit(number);
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());
}
/**
* clearBit(int n) inside a positive number.
*/
public void testClearBitPositiveInside2() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 17;
byte rBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.clearBit(number);
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());
}
/**
* clearBit(int n) inside a positive number.
*/
public void testClearBitPositiveInside3() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 45;
byte rBytes[] = {1, -128, 56, 100, -2, -76, 89, 13, 91, 3, -15, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.clearBit(number);
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());
}
/**
* clearBit(int n) inside a positive number.
*/
public void testClearBitPositiveInside4() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 50;
byte rBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.clearBit(number);
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());
}
/**
* clearBit(int n) inside a positive number.
*/
public void testClearBitPositiveInside5() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 63;
byte rBytes[] = {1, -128, 56, 100, -2, 52, 89, 45, 91, 3, -15, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.clearBit(number);
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());
}
/**
* clearBit(int n) outside a positive number.
*/
public void testClearBitPositiveOutside1() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 150;
byte rBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.clearBit(number);
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());
}
/**
* clearBit(int n) outside a positive number.
*/
public void testClearBitPositiveOutside2() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 191;
byte rBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.clearBit(number);
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());
}
/**
* clearBit(int n) the leftmost bit in a negative number.
*/
public void testClearBitTopNegative() {
byte aBytes[] = {1, -128, 56, 100, -15, 35, 26};
int aSign = -1;
int number = 63;
byte rBytes[] = {-1, 127, -2, 127, -57, -101, 14, -36, -26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.clearBit(number);
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());
}
/**
* clearBit(int n) outside zero.
*/
public void testClearBitZero() {
byte aBytes[] = {0};
int aSign = 0;
int number = 0;
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.clearBit(number);
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());
}
/**
* clearBit(int n) outside zero.
*/
public void testClearBitZeroOutside1() {
byte aBytes[] = {0};
int aSign = 0;
int number = 95;
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.clearBit(number);
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());
}
/**
* flipBit(int n) of a negative n.
*/
public void testFlipBitException() {
byte aBytes[] = {-1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = -7;
BigInteger aNumber = new BigInteger(aSign, aBytes);
try {
aNumber.flipBit(number);
fail("ArithmeticException has not been caught");
} catch (ArithmeticException e) {
assertEquals("Improper exception message", "Negative bit address",
e.getMessage());
}
}
/**
* flipBit(int n) the leftmost bit in a negative number.
*/
public void testFlipBitLeftmostNegative() {
byte aBytes[] = {1, -128, 56, 100, -15, 35, 26};
int aSign = -1;
int number = 48;
byte rBytes[] = {-1, 127, -57, -101, 14, -36, -26, 49};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.flipBit(number);
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());
}
/**
* flipBit(int n) the leftmost bit in a positive number.
*/
public void testFlipBitLeftmostPositive() {
byte aBytes[] = {1, -128, 56, 100, -15, 35, 26};
int aSign = 1;
int number = 48;
byte rBytes[] = {0, -128, 56, 100, -15, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.flipBit(number);
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());
}
/**
* flipBit(int n) inside a negative number.
*/
public void testFlipBitNegativeInside1() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = -1;
int number = 15;
byte rBytes[] = {-2, 127, -57, -101, 1, 75, -90, -46, -92, -4, 14, 92, -26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.flipBit(number);
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());
}
/**
* flipBit(int n) inside a negative number.
*/
public void testFlipBitNegativeInside2() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = -1;
int number = 45;
byte rBytes[] = {-2, 127, -57, -101, 1, 75, -90, -14, -92, -4, 14, -36, -26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.flipBit(number);
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());
}
/**
* flipBit(int n) inside a negative number with all ones in bit representation.
*/
public void testFlipBitNegativeInside3() {
String as = "-18446744073709551615";
String res = "-18446744073709551611";
int number = 2;
BigInteger aNumber = new BigInteger(as);
BigInteger result = aNumber.flipBit(number);
assertEquals(res, result.toString());
}
/**
* flipBit(0) in the negative number of length 1 with all ones in bit
* representation. the resulting number's length is 2.
*/
public void testFlipBitNegativeInside4() {
String as = "-4294967295";
String res = "-4294967296";
int number = 0;
BigInteger aNumber = new BigInteger(as);
BigInteger result = aNumber.flipBit(number);
assertEquals(res, result.toString());
}
/**
* flipBit(0) in the negative number of length 2 with all ones in bit
* representation. the resulting number's length is 3.
*/
public void testFlipBitNegativeInside5() {
String as = "-18446744073709551615";
String res = "-18446744073709551616";
int number = 0;
BigInteger aNumber = new BigInteger(as);
BigInteger result = aNumber.flipBit(number);
assertEquals(res, result.toString());
}
/**
* flipBit(int n) outside a negative number.
*/
public void testFlipBitNegativeOutside1() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = -1;
int number = 150;
byte rBytes[] = {
-65, -1, -1, -1, -1, -1, -2, 127, -57, -101, 1, 75, -90, -46, -92, -4,
14, -36, -26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.flipBit(number);
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());
}
/**
* flipBit(int n) outside a negative number.
*/
public void testFlipBitNegativeOutside2() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = -1;
int number = 191;
byte rBytes[] = {
-1, 127, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -2, 127, -57, -101, 1,
75, -90, -46, -92, -4, 14, -36, -26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.flipBit(number);
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());
}
/**
* flipBit(int n) inside a positive number.
*/
public void testFlipBitPositiveInside1() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 15;
byte rBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, -93, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.flipBit(number);
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());
}
/**
* flipBit(int n) inside a positive number.
*/
public void testFlipBitPositiveInside2() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 45;
byte rBytes[] = {1, -128, 56, 100, -2, -76, 89, 13, 91, 3, -15, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.flipBit(number);
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());
}
/**
* flipBit(int n) outside a positive number.
*/
public void testFlipBitPositiveOutside1() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 150;
byte rBytes[] = {
64, 0, 0, 0, 0, 0, 1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35,
26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.flipBit(number);
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());
}
/**
* flipBit(int n) outside a positive number.
*/
public void testFlipBitPositiveOutside2() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 191;
byte rBytes[] = {
0, -128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -128, 56, 100, -2, -76, 89,
45, 91, 3, -15, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.flipBit(number);
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());
}
/**
* flipBit(int n) zero.
*/
public void testFlipBitZero() {
byte aBytes[] = {0};
int aSign = 0;
int number = 0;
byte rBytes[] = {1};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.flipBit(number);
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());
}
/**
* flipBit(int n) outside zero.
*/
public void testFlipBitZeroOutside1() {
byte aBytes[] = {0};
int aSign = 0;
int number = 62;
byte rBytes[] = {64, 0, 0, 0, 0, 0, 0, 0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.flipBit(number);
byte resBytes[] = new byte[rBytes.length];
resBytes = result.toByteArray();
for (int i = 0; i < resBytes.length; i++) {
assertTrue("incorrect value", resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, result.signum());
}
/**
* flipBit(int n) outside zero.
*/
public void testFlipBitZeroOutside2() {
byte aBytes[] = {0};
int aSign = 0;
int number = 63;
byte rBytes[] = {0, -128, 0, 0, 0, 0, 0, 0, 0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.flipBit(number);
byte resBytes[] = new byte[rBytes.length];
resBytes = result.toByteArray();
for (int i = 0; i < resBytes.length; i++) {
assertTrue("incorrect value", resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, result.signum());
}
/**
* setBit: check the case when the number of bit to be set can be represented
* as n * 32 + 31, where n is an arbitrary integer. Here 191 = 5 * 32 + 31.
*/
public void testSetBitBug1331() {
BigInteger result = BigInteger.valueOf(0L).setBit(191);
assertEquals("incorrect value",
"3138550867693340381917894711603833208051177722232017256448",
result.toString());
assertEquals("incorrect sign", 1, result.signum());
}
/**
* setBit(int n) of a negative n.
*/
public void testSetBitException() {
byte aBytes[] = {-1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = -7;
BigInteger aNumber = new BigInteger(aSign, aBytes);
try {
aNumber.setBit(number);
fail("ArithmeticException has not been caught");
} catch (ArithmeticException e) {
assertEquals("Improper exception message", "Negative bit address",
e.getMessage());
}
}
/**
* setBit(int n) the leftmost bit in a negative number.
*/
public void testSetBitLeftmostNegative() {
byte aBytes[] = {1, -128, 56, 100, -15, 35, 26};
int aSign = -1;
int number = 48;
byte rBytes[] = {-1, 127, -57, -101, 14, -36, -26, 49};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.setBit(number);
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());
}
/**
* setBit(int n) inside a negative number.
*/
public void testSetBitNegativeInside1() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = -1;
int number = 15;
byte rBytes[] = {-2, 127, -57, -101, 1, 75, -90, -46, -92, -4, 14, -36, -26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.setBit(number);
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());
}
/**
* setBit(int n) inside a negative number.
*/
public void testSetBitNegativeInside2() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = -1;
int number = 44;
byte rBytes[] = {-2, 127, -57, -101, 1, 75, -90, -46, -92, -4, 14, -36, -26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.setBit(number);
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());
}
/**
* setBit(int n) inside a negative number with all ones in bit representation.
*/
public void testSetBitNegativeInside3() {
String as = "-18446744073709551615";
String res = "-18446744073709551611";
int number = 2;
BigInteger aNumber = new BigInteger(as);
BigInteger result = aNumber.setBit(number);
assertEquals(res, result.toString());
}
/**
* setBit(0) in the negative number of length 1 with all ones in bit
* representation. the resulting number's length is 2.
*/
public void testSetBitNegativeInside4() {
String as = "-4294967295";
int number = 0;
BigInteger aNumber = new BigInteger(as);
BigInteger result = aNumber.setBit(number);
assertEquals(as, result.toString());
}
/**
* setBit(0) in the negative number of length 2 with all ones in bit
* representation. the resulting number's length is 3.
*/
public void testSetBitNegativeInside5() {
String as = "-18446744073709551615";
int number = 0;
BigInteger aNumber = new BigInteger(as);
BigInteger result = aNumber.setBit(number);
assertEquals(as, result.toString());
}
/**
* setBit(int n) outside a negative number.
*/
public void testSetBitNegativeOutside1() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = -1;
int number = 150;
byte rBytes[] = {-2, 127, -57, -101, 1, 75, -90, -46, -92, -4, 14, -36, -26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.setBit(number);
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());
}
/**
* setBit(int n) outside a negative number.
*/
public void testSetBitNegativeOutside2() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = -1;
int number = 191;
byte rBytes[] = {-2, 127, -57, -101, 1, 75, -90, -46, -92, -4, 14, -36, -26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.setBit(number);
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());
}
/**
* setBit(int n) inside a positive number.
*/
public void testSetBitPositiveInside1() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 20;
byte rBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.setBit(number);
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());
}
/**
* setBit(int n) inside a positive number.
*/
public void testSetBitPositiveInside2() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 17;
byte rBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -13, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.setBit(number);
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());
}
/**
* setBit(int n) inside a positive number.
*/
public void testSetBitPositiveInside3() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 45;
byte rBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.setBit(number);
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());
}
/**
* setBit(int n) inside a positive number.
*/
public void testSetBitPositiveInside4() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 50;
byte rBytes[] = {1, -128, 56, 100, -2, -76, 93, 45, 91, 3, -15, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.setBit(number);
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());
}
/**
* setBit(int n) outside a positive number.
*/
public void testSetBitPositiveOutside1() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 150;
byte rBytes[] = {
64, 0, 0, 0, 0, 0, 1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35,
26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.setBit(number);
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());
}
/**
* setBit(int n) outside a positive number.
*/
public void testSetBitPositiveOutside2() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 223;
byte rBytes[] = {
0, -128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, -128, 56, 100,
-2, -76, 89, 45, 91, 3, -15, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.setBit(number);
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());
}
/**
* setBit(int n) the leftmost bit in a positive number.
*/
public void testSetBitTopPositive() {
byte aBytes[] = {1, -128, 56, 100, -15, 35, 26};
int aSign = 1;
int number = 63;
byte rBytes[] = {0, -128, 1, -128, 56, 100, -15, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.setBit(number);
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());
}
/**
* setBit(int n) outside zero.
*/
public void testSetBitZero() {
byte aBytes[] = {0};
int aSign = 0;
int number = 0;
byte rBytes[] = {1};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.setBit(number);
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());
}
/**
* setBit(int n) outside zero.
*/
public void testSetBitZeroOutside1() {
byte aBytes[] = {0};
int aSign = 0;
int number = 95;
byte rBytes[] = {0, -128, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.setBit(number);
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());
}
/**
* shiftLeft(int n), n = 0.
*/
public void testShiftLeft1() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 0;
byte rBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.shiftLeft(number);
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());
}
/**
* shiftLeft(int n), n < 0.
*/
public void testShiftLeft2() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = -27;
byte rBytes[] = {48, 7, 12, -97, -42, -117, 37, -85, 96};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.shiftLeft(number);
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());
}
/**
* shiftLeft(int n) a positive number, n > 0.
*/
public void testShiftLeft3() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 27;
byte rBytes[] = {
12, 1, -61, 39, -11, -94, -55, 106, -40, 31, -119, 24, -48, 0, 0, 0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.shiftLeft(number);
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());
}
/**
* shiftLeft(int n) a positive number, n > 0.
*/
public void testShiftLeft4() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 45;
byte rBytes[] = {
48, 7, 12, -97, -42, -117, 37, -85, 96, 126, 36, 99, 64, 0, 0, 0, 0, 0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.shiftLeft(number);
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());
}
/**
* shiftLeft(int n) a negative number, n > 0.
*/
public void testShiftLeft5() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = -1;
int number = 45;
byte rBytes[] = {
-49, -8, -13, 96, 41, 116, -38, 84, -97, -127, -37, -100, -64, 0, 0, 0,
0, 0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.shiftLeft(number);
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());
}
/**
* shiftRight(int n), n = 0.
*/
public void testShiftRight1() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 0;
byte rBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.shiftRight(number);
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());
}
/**
* shiftRight(int n), n < 0.
*/
public void testShiftRight2() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = -27;
byte rBytes[] = {
12, 1, -61, 39, -11, -94, -55, 106, -40, 31, -119, 24, -48, 0, 0, 0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.shiftRight(number);
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());
}
/**
* shiftRight(int n), 0 < n < 32.
*/
public void testShiftRight3() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 27;
byte rBytes[] = {48, 7, 12, -97, -42, -117, 37, -85, 96};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.shiftRight(number);
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());
}
/**
* shiftRight(int n), n > 32.
*/
public void testShiftRight4() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 45;
byte rBytes[] = {12, 1, -61, 39, -11, -94, -55};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.shiftRight(number);
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());
}
/**
* shiftRight(int n), n is greater than bitLength().
*/
public void testShiftRight5() {
byte aBytes[] = {1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 300;
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.shiftRight(number);
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());
}
/**
* shiftRight a negative number; shift distance is NOT multiple of 32; shifted
* bits are NOT zeroes.
*/
public void testShiftRightNegNonZeroes() {
byte aBytes[] = {
1, -128, 56, 100, -2, -76, 89, 45, 91, 0, 0, 0, 0, 0, 0, 0, 0};
int aSign = -1;
int number = 68;
byte rBytes[] = {-25, -4, 121, -80, 20, -70, 109, 42};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.shiftRight(number);
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());
}
/**
* shiftRight a negative number; shift distance is multiple of 32; shifted
* bits are NOT zeroes.
*/
public void testShiftRightNegNonZeroesMul32() {
byte aBytes[] = {
1, -128, 56, 100, -2, -76, 89, 45, 91, 1, 0, 0, 0, 0, 0, 0, 0};
int aSign = -1;
int number = 64;
byte rBytes[] = {-2, 127, -57, -101, 1, 75, -90, -46, -92};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.shiftRight(number);
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());
}
/**
* shiftRight a negative number; shift distance is NOT multiple of 32; shifted
* bits are zeroes.
*/
public void testShiftRightNegZeroes() {
byte aBytes[] = {
1, -128, 56, 100, -2, -76, 89, 45, 0, 0, 0, 0, 0, 0, 0, 0, 0};
int aSign = -1;
int number = 68;
byte rBytes[] = {-25, -4, 121, -80, 20, -70, 109, 48};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.shiftRight(number);
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());
}
/**
* shiftRight a negative number; shift distance is multiple of 32; shifted
* bits are zeroes.
*/
public void testShiftRightNegZeroesMul32() {
byte aBytes[] = {
1, -128, 56, 100, -2, -76, 89, 45, 91, 0, 0, 0, 0, 0, 0, 0, 0};
int aSign = -1;
int number = 64;
byte rBytes[] = {-2, 127, -57, -101, 1, 75, -90, -46, -91};
BigInteger aNumber = new BigInteger(aSign, aBytes);
BigInteger result = aNumber.shiftRight(number);
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());
}
/**
* testBit(int n) of a negative n.
*/
public void testTestBitException() {
byte aBytes[] = {-1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = -7;
BigInteger aNumber = new BigInteger(aSign, aBytes);
try {
aNumber.testBit(number);
fail("ArithmeticException has not been caught");
} catch (ArithmeticException e) {
assertEquals("Improper exception message", "Negative bit address",
e.getMessage());
}
}
/**
* testBit(int n) of a negative number.
*/
public void testTestBitNegative1() {
byte aBytes[] = {-1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = -1;
int number = 7;
BigInteger aNumber = new BigInteger(aSign, aBytes);
assertTrue(aNumber.testBit(number));
}
/**
* testBit(int n) of a positive n.
*/
public void testTestBitNegative2() {
byte aBytes[] = {-1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = -1;
int number = 45;
BigInteger aNumber = new BigInteger(aSign, aBytes);
assertTrue(!aNumber.testBit(number));
}
/**
* testBit(int n) of a positive n, n > bitLength().
*/
public void testTestBitNegative3() {
byte aBytes[] = {-1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = -1;
int number = 300;
BigInteger aNumber = new BigInteger(aSign, aBytes);
assertTrue(aNumber.testBit(number));
}
/**
* testBit(int n) of a positive number.
*/
public void testTestBitPositive1() {
byte aBytes[] = {-1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 7;
BigInteger aNumber = new BigInteger(aSign, aBytes);
assertTrue(!aNumber.testBit(number));
}
/**
* testBit(int n) of a positive number.
*/
public void testTestBitPositive2() {
byte aBytes[] = {-1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 45;
BigInteger aNumber = new BigInteger(aSign, aBytes);
assertTrue(aNumber.testBit(number));
}
/**
* testBit(int n) of a positive number, n > bitLength().
*/
public void testTestBitPositive3() {
byte aBytes[] = {-1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26};
int aSign = 1;
int number = 300;
BigInteger aNumber = new BigInteger(aSign, aBytes);
assertTrue(!aNumber.testBit(number));
}
}