/*
* 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;
import java.util.Random;
/**
* Class: java.math.BigInteger
* Constructors: BigInteger(byte[] a), BigInteger(int sign, byte[] a),
* BigInteger(String val, int radix)
*/
public class BigIntegerConstructorsTest extends TestCase {
/**
* Create a number from an array of bytes.
* Verify an exception thrown if an array is zero bytes long
*/
public void testConstructorBytesException() {
byte aBytes[] = {};
try {
new BigInteger(aBytes);
fail("NumberFormatException has not been caught");
} catch (NumberFormatException e) {
}
}
/**
* Create a positive number from an array of bytes.
* The number fits in an array of integers.
*/
public void testConstructorBytesPositive1() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
byte rBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
BigInteger aNumber = new BigInteger(aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, aNumber.signum());
}
/**
* Create a positive number from an array of bytes.
* The number fits in an integer.
*/
public void testConstructorBytesPositive2() {
byte aBytes[] = {12, 56, 100};
byte rBytes[] = {12, 56, 100};
BigInteger aNumber = new BigInteger(aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, aNumber.signum());
}
/**
* Create a positive number from an array of bytes.
* The number of bytes is 4.
*/
public void testConstructorBytesPositive3() {
byte aBytes[] = {127, 56, 100, -1};
byte rBytes[] = {127, 56, 100, -1};
BigInteger aNumber = new BigInteger(aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, aNumber.signum());
}
/**
* Create a positive number from an array of bytes.
* The number of bytes is multiple of 4.
*/
public void testConstructorBytesPositive() {
byte aBytes[] = {127, 56, 100, -1, 14, 75, -24, -100};
byte rBytes[] = {127, 56, 100, -1, 14, 75, -24, -100};
BigInteger aNumber = new BigInteger(aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, aNumber.signum());
}
/**
* Create a negative number from an array of bytes.
* The number fits in an array of integers.
*/
public void testConstructorBytesNegative1() {
byte aBytes[] = {-12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
byte rBytes[] = {-12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26, 3, 91};
BigInteger aNumber = new BigInteger(aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", -1, aNumber.signum());
}
/**
* Create a negative number from an array of bytes.
* The number fits in an integer.
*/
public void testConstructorBytesNegative2() {
byte aBytes[] = {-12, 56, 100};
byte rBytes[] = {-12, 56, 100};
BigInteger aNumber = new BigInteger(aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", -1, aNumber.signum());
}
/**
* Create a negative number from an array of bytes.
* The number of bytes is 4.
*/
public void testConstructorBytesNegative3() {
byte aBytes[] = {-128, -12, 56, 100};
byte rBytes[] = {-128, -12, 56, 100};
BigInteger aNumber = new BigInteger(aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", -1, aNumber.signum());
}
/**
* Create a negative number from an array of bytes.
* The number of bytes is multiple of 4.
*/
public void testConstructorBytesNegative4() {
byte aBytes[] = {-128, -12, 56, 100, -13, 56, 93, -78};
byte rBytes[] = {-128, -12, 56, 100, -13, 56, 93, -78};
BigInteger aNumber = new BigInteger(aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", -1, aNumber.signum());
}
/**
* Create a zero number from an array of zero bytes.
*/
public void testConstructorBytesZero() {
byte aBytes[] = {0, 0, 0, -0, +0, 0, -0};
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 0, aNumber.signum());
}
/**
* Create a number from a sign and an array of bytes.
* Verify an exception thrown if a sign has improper value.
*/
public void testConstructorSignBytesException1() {
byte aBytes[] = {123, 45, -3, -76};
int aSign = 3;
try {
new BigInteger(aSign, aBytes);
fail("NumberFormatException has not been caught");
} catch (NumberFormatException e) {
}
}
/**
* Create a number from a sign and an array of bytes.
* Verify an exception thrown if the array contains non-zero bytes while the sign is 0.
*/
public void testConstructorSignBytesException2() {
byte aBytes[] = {123, 45, -3, -76};
int aSign = 0;
try {
new BigInteger(aSign, aBytes);
fail("NumberFormatException has not been caught");
} catch (NumberFormatException e) {
assertEquals("Improper exception message", "signum-magnitude mismatch", e.getMessage());
}
}
/**
* Create a positive number from a sign and an array of bytes.
* The number fits in an array of integers.
* The most significant byte is positive.
*/
public void testConstructorSignBytesPositive1() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15};
int aSign = 1;
byte rBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, aNumber.signum());
}
/**
* Create a positive number from a sign and an array of bytes.
* The number fits in an array of integers.
* The most significant byte is negative.
*/
public void testConstructorSignBytesPositive2() {
byte aBytes[] = {-12, 56, 100, -2, -76, 89, 45, 91, 3, -15};
int aSign = 1;
byte rBytes[] = {0, -12, 56, 100, -2, -76, 89, 45, 91, 3, -15};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, aNumber.signum());
}
/**
* Create a positive number from a sign and an array of bytes.
* The number fits in an integer.
*/
public void testConstructorSignBytesPositive3() {
byte aBytes[] = {-12, 56, 100};
int aSign = 1;
byte rBytes[] = {0, -12, 56, 100};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, aNumber.signum());
}
/**
* Create a positive number from a sign and an array of bytes.
* The number of bytes is 4.
* The most significant byte is positive.
*/
public void testConstructorSignBytesPositive4() {
byte aBytes[] = {127, 56, 100, -2};
int aSign = 1;
byte rBytes[] = {127, 56, 100, -2};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, aNumber.signum());
}
/**
* Create a positive number from a sign and an array of bytes.
* The number of bytes is 4.
* The most significant byte is negative.
*/
public void testConstructorSignBytesPositive5() {
byte aBytes[] = {-127, 56, 100, -2};
int aSign = 1;
byte rBytes[] = {0, -127, 56, 100, -2};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, aNumber.signum());
}
/**
* Create a positive number from a sign and an array of bytes.
* The number of bytes is multiple of 4.
* The most significant byte is positive.
*/
public void testConstructorSignBytesPositive6() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 23, -101};
int aSign = 1;
byte rBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 23, -101};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, aNumber.signum());
}
/**
* Create a positive number from a sign and an array of bytes.
* The number of bytes is multiple of 4.
* The most significant byte is negative.
*/
public void testConstructorSignBytesPositive7() {
byte aBytes[] = {-12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 23, -101};
int aSign = 1;
byte rBytes[] = {0, -12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 23, -101};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, aNumber.signum());
}
/**
* Create a negative number from a sign and an array of bytes.
* The number fits in an array of integers.
* The most significant byte is positive.
*/
public void testConstructorSignBytesNegative1() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15};
int aSign = -1;
byte rBytes[] = {-13, -57, -101, 1, 75, -90, -46, -92, -4, 15};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", -1, aNumber.signum());
}
/**
* Create a negative number from a sign and an array of bytes.
* The number fits in an array of integers.
* The most significant byte is negative.
*/
public void testConstructorSignBytesNegative2() {
byte aBytes[] = {-12, 56, 100, -2, -76, 89, 45, 91, 3, -15};
int aSign = -1;
byte rBytes[] = {-1, 11, -57, -101, 1, 75, -90, -46, -92, -4, 15};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", -1, aNumber.signum());
}
/**
* Create a negative number from a sign and an array of bytes.
* The number fits in an integer.
*/
public void testConstructorSignBytesNegative3() {
byte aBytes[] = {-12, 56, 100};
int aSign = -1;
byte rBytes[] = {-1, 11, -57, -100};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", -1, aNumber.signum());
}
/**
* Create a negative number from a sign and an array of bytes.
* The number of bytes is 4.
* The most significant byte is positive.
*/
public void testConstructorSignBytesNegative4() {
byte aBytes[] = {127, 56, 100, -2};
int aSign = -1;
byte rBytes[] = {-128, -57, -101, 2};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", -1, aNumber.signum());
}
/**
* Create a negative number from a sign and an array of bytes.
* The number of bytes is 4.
* The most significant byte is negative.
*/
public void testConstructorSignBytesNegative5() {
byte aBytes[] = {-127, 56, 100, -2};
int aSign = -1;
byte rBytes[] = {-1, 126, -57, -101, 2};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", -1, aNumber.signum());
}
/**
* Create a negative number from a sign and an array of bytes.
* The number of bytes is multiple of 4.
* The most significant byte is positive.
*/
public void testConstructorSignBytesNegative6() {
byte aBytes[] = {12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 23, -101};
int aSign = -1;
byte rBytes[] = {-13, -57, -101, 1, 75, -90, -46, -92, -4, 14, -24, 101};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", -1, aNumber.signum());
}
/**
* Create a negative number from a sign and an array of bytes.
* The number of bytes is multiple of 4.
* The most significant byte is negative.
*/
public void testConstructorSignBytesNegative7() {
byte aBytes[] = {-12, 56, 100, -2, -76, 89, 45, 91, 3, -15, 23, -101};
int aSign = -1;
byte rBytes[] = {-1, 11, -57, -101, 1, 75, -90, -46, -92, -4, 14, -24, 101};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", -1, aNumber.signum());
}
/**
* Create a zero number from a sign and an array of zero bytes.
* The sign is -1.
*/
public void testConstructorSignBytesZero1() {
byte aBytes[] = {-0, 0, +0, 0, 0, 00, 000};
int aSign = -1;
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 0, aNumber.signum());
}
/**
* Create a zero number from a sign and an array of zero bytes.
* The sign is 0.
*/
public void testConstructorSignBytesZero2() {
byte aBytes[] = {-0, 0, +0, 0, 0, 00, 000};
int aSign = 0;
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 0, aNumber.signum());
}
/**
* Create a zero number from a sign and an array of zero bytes.
* The sign is 1.
*/
public void testConstructorSignBytesZero3() {
byte aBytes[] = {-0, 0, +0, 0, 0, 00, 000};
int aSign = 1;
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 0, aNumber.signum());
}
/**
* Create a zero number from a sign and an array of zero length.
* The sign is -1.
*/
public void testConstructorSignBytesZeroNull1() {
byte aBytes[] = {};
int aSign = -1;
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 0, aNumber.signum());
}
/**
* Create a zero number from a sign and an array of zero length.
* The sign is 0.
*/
public void testConstructorSignBytesZeroNull2() {
byte aBytes[] = {};
int aSign = 0;
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 0, aNumber.signum());
}
/**
* Create a zero number from a sign and an array of zero length.
* The sign is 1.
*/
public void testConstructorSignBytesZeroNull3() {
byte aBytes[] = {};
int aSign = 1;
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(aSign, aBytes);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 0, aNumber.signum());
}
/**
* Create a number from a string value and radix.
* Verify an exception thrown if a radix is out of range
*/
public void testConstructorStringException1() {
String value = "9234853876401";
int radix = 45;
try {
new BigInteger(value, radix);
fail("NumberFormatException has not been caught");
} catch (NumberFormatException e) {
}
}
/**
* Create a number from a string value and radix.
* Verify an exception thrown if the string starts with a space.
*/
public void testConstructorStringException2() {
String value = " 9234853876401";
int radix = 10;
try {
new BigInteger(value, radix);
fail("NumberFormatException has not been caught");
} catch (NumberFormatException e) {
}
}
/**
* Create a number from a string value and radix.
* Verify an exception thrown if the string contains improper characters.
*/
public void testConstructorStringException3() {
String value = "92348$*#78987";
int radix = 34;
try {
new BigInteger(value, radix);
fail("NumberFormatException has not been caught");
} catch (NumberFormatException e) {
}
}
/**
* Create a number from a string value and radix.
* Verify an exception thrown if some digits are greater than radix.
*/
public void testConstructorStringException4() {
String value = "98zv765hdsaiy";
int radix = 20;
try {
new BigInteger(value, radix);
fail("NumberFormatException has not been caught");
} catch (NumberFormatException e) {
}
}
/**
* Create a positive number from a string value and radix 2.
*/
public void testConstructorStringRadix2() {
String value = "10101010101010101";
int radix = 2;
byte rBytes[] = {1, 85, 85};
BigInteger aNumber = new BigInteger(value, radix);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, aNumber.signum());
}
/**
* Create a positive number from a string value and radix 8.
*/
public void testConstructorStringRadix8() {
String value = "76356237071623450";
int radix = 8;
byte rBytes[] = {7, -50, -28, -8, -25, 39, 40};
BigInteger aNumber = new BigInteger(value, radix);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, aNumber.signum());
}
/**
* Create a positive number from a string value and radix 10.
*/
public void testConstructorStringRadix10() {
String value = "987328901348934898";
int radix = 10;
byte rBytes[] = {13, -77, -78, 103, -103, 97, 68, -14};
BigInteger aNumber = new BigInteger(value, radix);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, aNumber.signum());
}
/**
* Create a positive number from a string value and radix 16.
*/
public void testConstructorStringRadix16() {
String value = "fe2340a8b5ce790";
int radix = 16;
byte rBytes[] = {15, -30, 52, 10, -117, 92, -25, -112};
BigInteger aNumber = new BigInteger(value, radix);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, aNumber.signum());
}
/**
* Create a positive number from a string value and radix 36.
*/
public void testConstructorStringRadix36() {
String value = "skdjgocvhdjfkl20jndjkf347ejg457";
int radix = 36;
byte rBytes[] = {0, -12, -116, 112, -105, 12, -36, 66, 108, 66, -20, -37, -15, 108, -7, 52, -99, -109, -8, -45, -5};
BigInteger aNumber = new BigInteger(value, radix);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 1, aNumber.signum());
}
/**
* Create a negative number from a string value and radix 10.
*/
public void testConstructorStringRadix10Negative() {
String value = "-234871376037";
int radix = 36;
byte rBytes[] = {-4, 48, 71, 62, -76, 93, -105, 13};
BigInteger aNumber = new BigInteger(value, radix);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", -1, aNumber.signum());
}
/**
* Create a zero number from a string value and radix 36.
*/
public void testConstructorStringRadix10Zero() {
String value = "-00000000000000";
int radix = 10;
byte rBytes[] = {0};
BigInteger aNumber = new BigInteger(value, radix);
byte resBytes[] = new byte[rBytes.length];
resBytes = aNumber.toByteArray();
for(int i = 0; i < resBytes.length; i++) {
assertTrue(resBytes[i] == rBytes[i]);
}
assertEquals("incorrect sign", 0, aNumber.signum());
}
/**
* Create a random number of 75 bits length.
*/
public void testConstructorRandom() {
int bitLen = 75;
Random rnd = new Random();
BigInteger aNumber = new BigInteger(bitLen, rnd);
assertTrue("incorrect bitLength", aNumber.bitLength() <= bitLen);
}
public void testConstructorPrime() {
for (int rep = 0; rep < 2048; ++rep) {
Random rnd = new Random();
BigInteger b;
int bits;
// Create a 128-bit prime number.
bits = 128;
b = new BigInteger(bits, 10, rnd);
assertEquals(b.toString(), bits, b.bitLength());
// Create a prime number of 25 bits length.
bits = 25;
b = new BigInteger(bits, 10, rnd);
assertEquals(b.toString(), bits, b.bitLength());
// Create a prime number of 18 bits length.
bits = 18;
b = new BigInteger(bits, 10, rnd);
assertEquals(b.toString(), bits, b.bitLength());
// On Android, anything less than 16 bits used to be at least 16 bits
// because that's how OpenSSL behaves, but we recently fixed this...
bits = 2;
b = new BigInteger(bits, 10, rnd);
assertEquals(b.toString(), bits, b.bitLength());
// The 2-arg constructor has never used OpenSSL.
bits = 2;
b = new BigInteger(bits, rnd);
assertTrue(b.toString(), b.bitLength() <= bits);
assertTrue(b.toString(), b.intValue() <= 3);
bits = 16;
b = new BigInteger(bits, rnd);
assertTrue(b.toString(), b.bitLength() <= bits);
}
}
}