/*
* 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.
*/
package org.apache.brooklyn.util.math;
import org.apache.brooklyn.util.math.BitUtils;
import org.testng.Assert;
import org.testng.annotations.Test;
public class BitUtilsTest {
@Test
public void checkReverseBitSignificance() {
Assert.assertEquals(BitUtils.reverseBitSignificanceInByte(1), (byte)128);
Assert.assertEquals(BitUtils.reverseBitSignificanceInByte(2), 64);
Assert.assertEquals(BitUtils.reverseBitSignificanceInByte(8), 16);
Assert.assertEquals(BitUtils.reverseBitSignificanceInByte(16), 8);
Assert.assertEquals(BitUtils.reverseBitSignificanceInByte(128), 1);
Assert.assertEquals(BitUtils.reverseBitSignificanceInByte(160), 5);
Assert.assertEquals(BitUtils.reverseBitSignificanceInByte(-96), 5);
Assert.assertEquals(BitUtils.reverseBitSignificanceInByte(3), (byte)192);
Assert.assertEquals(BitUtils.reverseBitSignificanceInBytes(1, 2), new byte[] { (byte)128, 64 });
Assert.assertEquals(BitUtils.reverseBitSignificanceInBytes(3, 8, 16, 192, 255), new byte[] { (byte)192, 16, 8, 3, (byte)255 });
}
@Test
public void checkUnsigned() {
Assert.assertEquals(BitUtils.unsigned((byte)-96), 160);
Assert.assertEquals(BitUtils.unsigned((byte)160), 160);
Assert.assertEquals(BitUtils.unsignedByte(-96), 160);
Assert.assertEquals(BitUtils.unsignedByte(-96-256-256), 160);
Assert.assertEquals(BitUtils.unsignedByte(-96+256), 160);
Assert.assertEquals(BitUtils.unsignedByte(-96+256+256), 160);
}
}