/*
* 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.commons.lang3;
import static org.junit.Assert.assertEquals;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import org.junit.Test;
/**
* Class to test BitField functionality
*
* @version $Id$
*/
public class BitFieldTest {
private static final BitField bf_multi = new BitField(0x3F80);
private static final BitField bf_single = new BitField(0x4000);
private static final BitField bf_zero = new BitField(0);
/**
* test the getValue() method
*/
@Test
public void testGetValue() {
assertEquals(bf_multi.getValue(-1), 127);
assertEquals(bf_multi.getValue(0), 0);
assertEquals(bf_single.getValue(-1), 1);
assertEquals(bf_single.getValue(0), 0);
assertEquals(bf_zero.getValue(-1), 0);
assertEquals(bf_zero.getValue(0), 0);
}
/**
* test the getShortValue() method
*/
@Test
public void testGetShortValue() {
assertEquals(bf_multi.getShortValue((short) - 1), (short) 127);
assertEquals(bf_multi.getShortValue((short) 0), (short) 0);
assertEquals(bf_single.getShortValue((short) - 1), (short) 1);
assertEquals(bf_single.getShortValue((short) 0), (short) 0);
assertEquals(bf_zero.getShortValue((short) -1), (short) 0);
assertEquals(bf_zero.getShortValue((short) 0), (short) 0);
}
/**
* test the getRawValue() method
*/
@Test
public void testGetRawValue() {
assertEquals(bf_multi.getRawValue(-1), 0x3F80);
assertEquals(bf_multi.getRawValue(0), 0);
assertEquals(bf_single.getRawValue(-1), 0x4000);
assertEquals(bf_single.getRawValue(0), 0);
assertEquals(bf_zero.getRawValue(-1), 0);
assertEquals(bf_zero.getRawValue(0), 0);
}
/**
* test the getShortRawValue() method
*/
@Test
public void testGetShortRawValue() {
assertEquals(bf_multi.getShortRawValue((short) - 1), (short) 0x3F80);
assertEquals(bf_multi.getShortRawValue((short) 0), (short) 0);
assertEquals(bf_single.getShortRawValue((short) - 1), (short) 0x4000);
assertEquals(bf_single.getShortRawValue((short) 0), (short) 0);
assertEquals(bf_zero.getShortRawValue((short) -1), (short) 0);
assertEquals(bf_zero.getShortRawValue((short) 0), (short) 0);
}
/**
* test the isSet() method
*/
@Test
public void testIsSet() {
assertTrue(!bf_multi.isSet(0));
assertTrue(!bf_zero.isSet(0));
for (int j = 0x80; j <= 0x3F80; j += 0x80) {
assertTrue(bf_multi.isSet(j));
}
for (int j = 0x80; j <= 0x3F80; j += 0x80) {
assertTrue(!bf_zero.isSet(j));
}
assertTrue(!bf_single.isSet(0));
assertTrue(bf_single.isSet(0x4000));
}
/**
* test the isAllSet() method
*/
@Test
public void testIsAllSet() {
for (int j = 0; j < 0x3F80; j += 0x80) {
assertTrue(!bf_multi.isAllSet(j));
assertTrue(bf_zero.isAllSet(j));
}
assertTrue(bf_multi.isAllSet(0x3F80));
assertTrue(!bf_single.isAllSet(0));
assertTrue(bf_single.isAllSet(0x4000));
}
/**
* test the setValue() method
*/
@Test
public void testSetValue() {
for (int j = 0; j < 128; j++) {
assertEquals(bf_multi.getValue(bf_multi.setValue(0, j)), j);
assertEquals(bf_multi.setValue(0, j), j << 7);
}
for (int j = 0; j < 128; j++) {
assertEquals(bf_zero.getValue(bf_zero.setValue(0, j)), 0);
assertEquals(bf_zero.setValue(0, j), 0);
}
// verify that excess bits are stripped off
assertEquals(bf_multi.setValue(0x3f80, 128), 0);
for (int j = 0; j < 2; j++) {
assertEquals(bf_single.getValue(bf_single.setValue(0, j)), j);
assertEquals(bf_single.setValue(0, j), j << 14);
}
// verify that excess bits are stripped off
assertEquals(bf_single.setValue(0x4000, 2), 0);
}
/**
* test the setShortValue() method
*/
@Test
public void testSetShortValue() {
for (int j = 0; j < 128; j++) {
assertEquals(bf_multi.getShortValue(bf_multi.setShortValue((short) 0, (short) j)), (short) j);
assertEquals(bf_multi.setShortValue((short) 0, (short) j), (short) (j << 7));
}
for (int j = 0; j < 128; j++) {
assertEquals(bf_zero.getShortValue(bf_zero.setShortValue((short) 0, (short) j)), (short) 0);
assertEquals(bf_zero.setShortValue((short) 0, (short) j), (short) 0);
}
// verify that excess bits are stripped off
assertEquals(bf_multi.setShortValue((short) 0x3f80, (short) 128), (short) 0);
for (int j = 0; j < 2; j++) {
assertEquals(bf_single.getShortValue(bf_single.setShortValue((short) 0, (short) j)), (short) j);
assertEquals(bf_single.setShortValue((short) 0, (short) j), (short) (j << 14));
}
// verify that excess bits are stripped off
assertEquals(bf_single.setShortValue((short) 0x4000, (short) 2), (short) 0);
}
@Test
public void testByte() {
assertEquals(0, new BitField(0).setByteBoolean((byte) 0, true));
assertEquals(1, new BitField(1).setByteBoolean((byte) 0, true));
assertEquals(2, new BitField(2).setByteBoolean((byte) 0, true));
assertEquals(4, new BitField(4).setByteBoolean((byte) 0, true));
assertEquals(8, new BitField(8).setByteBoolean((byte) 0, true));
assertEquals(16, new BitField(16).setByteBoolean((byte) 0, true));
assertEquals(32, new BitField(32).setByteBoolean((byte) 0, true));
assertEquals(64, new BitField(64).setByteBoolean((byte) 0, true));
assertEquals(-128, new BitField(128).setByteBoolean((byte) 0, true));
assertEquals(1, new BitField(0).setByteBoolean((byte) 1, false));
assertEquals(0, new BitField(1).setByteBoolean((byte) 1, false));
assertEquals(0, new BitField(2).setByteBoolean((byte) 2, false));
assertEquals(0, new BitField(4).setByteBoolean((byte) 4, false));
assertEquals(0, new BitField(8).setByteBoolean((byte) 8, false));
assertEquals(0, new BitField(16).setByteBoolean((byte) 16, false));
assertEquals(0, new BitField(32).setByteBoolean((byte) 32, false));
assertEquals(0, new BitField(64).setByteBoolean((byte) 64, false));
assertEquals(0, new BitField(128).setByteBoolean((byte) 128, false));
assertEquals(-2, new BitField(1).setByteBoolean((byte) 255, false));
final byte clearedBit = new BitField(0x40).setByteBoolean((byte) - 63, false);
assertFalse(new BitField(0x40).isSet(clearedBit));
}
/**
* test the clear() method
*/
@Test
public void testClear() {
assertEquals(bf_multi.clear(-1), 0xFFFFC07F);
assertEquals(bf_single.clear(-1), 0xFFFFBFFF);
assertEquals(bf_zero.clear(-1), 0xFFFFFFFF);
}
/**
* test the clearShort() method
*/
@Test
public void testClearShort() {
assertEquals(bf_multi.clearShort((short) - 1), (short) 0xC07F);
assertEquals(bf_single.clearShort((short) - 1), (short) 0xBFFF);
assertEquals(bf_zero.clearShort((short) -1), (short) 0xFFFF);
}
/**
* test the set() method
*/
@Test
public void testSet() {
assertEquals(bf_multi.set(0), 0x3F80);
assertEquals(bf_single.set(0), 0x4000);
assertEquals(bf_zero.set(0), 0);
}
/**
* test the setShort() method
*/
@Test
public void testSetShort() {
assertEquals(bf_multi.setShort((short) 0), (short) 0x3F80);
assertEquals(bf_single.setShort((short) 0), (short) 0x4000);
assertEquals(bf_zero.setShort((short) 0), (short) 0);
}
/**
* test the setBoolean() method
*/
@Test
public void testSetBoolean() {
assertEquals(bf_multi.set(0), bf_multi.setBoolean(0, true));
assertEquals(bf_single.set(0), bf_single.setBoolean(0, true));
assertEquals(bf_zero.set(0), bf_zero.setBoolean(0, true));
assertEquals(bf_multi.clear(-1), bf_multi.setBoolean(-1, false));
assertEquals(bf_single.clear(-1), bf_single.setBoolean(-1, false));
assertEquals(bf_zero.clear(-1), bf_zero.setBoolean(-1, false));
}
/**
* test the setShortBoolean() method
*/
@Test
public void testSetShortBoolean() {
assertEquals(bf_multi.setShort((short) 0), bf_multi.setShortBoolean((short) 0, true));
assertEquals(bf_single.setShort((short) 0), bf_single.setShortBoolean((short) 0, true));
assertEquals(bf_zero.setShort((short) 0), bf_zero.setShortBoolean((short) 0, true));
assertEquals(bf_multi.clearShort((short) - 1), bf_multi.setShortBoolean((short) - 1, false));
assertEquals(bf_single.clearShort((short) - 1), bf_single.setShortBoolean((short) - 1, false));
assertEquals(bf_zero.clearShort((short) -1), bf_zero.setShortBoolean((short) -1, false));
}
}