| /* |
| * 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 |
| * @version $Revision$ |
| */ |
| |
| package libcore.java.math; |
| |
| import java.math.BigInteger; |
| import junit.framework.TestCase; |
| |
| public class OldBigIntegerOperateBitsTest extends TestCase { |
| |
| |
| /** |
| * java.math.BigInteger#getLowestSetBit() getLowestSetBit for |
| * negative BigInteger |
| */ |
| public void test_getLowestSetBitNeg() { |
| byte aBytes[] = { |
| -1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26 |
| }; |
| int aSign = -1; |
| int iNumber = 1; |
| BigInteger aNumber = new BigInteger(aSign, aBytes); |
| int result = aNumber.getLowestSetBit(); |
| assertTrue("incorrect value", result == iNumber); |
| } |
| |
| /** |
| * java.math.BigInteger#getLowestSetBit() getLowestSetBit for |
| * positive BigInteger |
| */ |
| public void test_getLowestSetBitPos() { |
| byte aBytes[] = { |
| -1, -128, 56, 100, -2, -76, 89, 45, 91, 3, -15, 35, 26 |
| }; |
| int aSign = 1; |
| int iNumber = 1; |
| BigInteger aNumber = new BigInteger(aSign, aBytes); |
| int result = aNumber.getLowestSetBit(); |
| assertTrue("incorrect value", result == iNumber); |
| |
| byte[] aBytes_ = { |
| 127, 0, 3 |
| }; |
| iNumber = 0; |
| aNumber = new BigInteger(aSign, aBytes_); |
| result = aNumber.getLowestSetBit(); |
| assertTrue("incorrect value", result == iNumber); |
| |
| byte[] aBytes__ = { |
| -128, 0, 0 |
| }; |
| iNumber = 23; |
| aNumber = new BigInteger(aSign, aBytes__); |
| result = aNumber.getLowestSetBit(); |
| assertTrue("incorrect value", result == iNumber); |
| } |
| |
| /** |
| * java.math.BigInteger#getLowestSetBit() getLowestSetBit for zero |
| * BigInteger |
| */ |
| public void test_getLowestSetBitZero() { |
| byte[] aBytes = { |
| 0 |
| }; |
| int aSign = 0; |
| int iNumber = -1; |
| BigInteger aNumber = new BigInteger(aSign, aBytes); |
| int result = aNumber.getLowestSetBit(); |
| assertTrue("incorrect value", result == iNumber); |
| |
| byte[] aBytes_ = { |
| 0, 0, 0 |
| }; |
| iNumber = -1; |
| aNumber = new BigInteger(aSign, aBytes_); |
| result = aNumber.getLowestSetBit(); |
| assertTrue("incorrect value", result == iNumber); |
| } |
| |
| } |