testbitfield.java

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/* ====================================================================
 * The Apache Software License, Version 1.1
 *
 * Copyright (c) 2003 The Apache Software Foundation.  All rights
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 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in
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 * 3. The end-user documentation included with the redistribution,
 *    if any, must include the following acknowledgment:
 *       "This product includes software developed by the
 *        Apache Software Foundation (http://www.apache.org/)."
 *    Alternately, this acknowledgment may appear in the software itself,
 *    if and wherever such third-party acknowledgments normally appear.
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 * 4. The names "Apache" and "Apache Software Foundation" and
 *    "Apache POI" must not be used to endorse or promote products
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 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

package org.apache.poi.util;

import junit.framework.*;

/**
 * Class to test BitField functionality
 *
 * @author Marc Johnson
 * @author Glen Stampoultzis ([e-mail])
 */

public class TestBitField
    extends TestCase
{
    private static BitField bf_multi  = new BitField(0x3F80);
    private static BitField bf_single = new BitField(0x4000);

    /**
     * Constructor TestBitField
     *
     * @param name
     */

    public TestBitField(String name)
    {
        super(name);
    }

    /**
     * test the getValue() method
     */

    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);
    }

    /**
     * test the getShortValue() method
     */

    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);
    }

    /**
     * test the getRawValue() method
     */

    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);
    }

    /**
     * test the getShortRawValue() method
     */

    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);
    }

    /**
     * test the isSet() method
     */

    public void testIsSet()
    {
        assertTrue(!bf_multi.isSet(0));
        for (int j = 0x80; j <= 0x3F80; j += 0x80)
        {
            assertTrue(bf_multi.isSet(j));
        }
        assertTrue(!bf_single.isSet(0));
        assertTrue(bf_single.isSet(0x4000));
    }

    /**
     * test the isAllSet() method
     */

    public void testIsAllSet()
    {
        for (int j = 0; j < 0x3F80; j += 0x80)
        {
            assertTrue(!bf_multi.isAllSet(j));
        }
        assertTrue(bf_multi.isAllSet(0x3F80));
        assertTrue(!bf_single.isAllSet(0));
        assertTrue(bf_single.isAllSet(0x4000));
    }

    /**
     * test the setValue() method
     */

    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);
        }

        // 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
     */

    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));
        }

        // 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);
    }

    public void testByte()
    {
        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(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));
        byte clearedBit = new BitField(0x40).setByteBoolean(( byte ) -63,
                                       false);

        assertEquals(false, new BitField(0x40).isSet(clearedBit));
    }

    /**
     * test the clear() method
     */

    public void testClear()
    {
        assertEquals(bf_multi.clear(-1), 0xFFFFC07F);
        assertEquals(bf_single.clear(-1), 0xFFFFBFFF);
    }

    /**
     * test the clearShort() method
     */

    public void testClearShort()
    {
        assertEquals(bf_multi.clearShort(( short ) -1), ( short ) 0xC07F);
        assertEquals(bf_single.clearShort(( short ) -1), ( short ) 0xBFFF);
    }

    /**
     * test the set() method
     */

    public void testSet()
    {
        assertEquals(bf_multi.set(0), 0x3F80);
        assertEquals(bf_single.set(0), 0x4000);
    }

    /**
     * test the setShort() method
     */

    public void testSetShort()
    {
        assertEquals(bf_multi.setShort(( short ) 0), ( short ) 0x3F80);
        assertEquals(bf_single.setShort(( short ) 0), ( short ) 0x4000);
    }

    /**
     * test the setBoolean() method
     */

    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_multi.clear(-1), bf_multi.setBoolean(-1, false));
        assertEquals(bf_single.clear(-1), bf_single.setBoolean(-1, false));
    }

    /**
     * test the setShortBoolean() method
     */

    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_multi.clearShort(( short ) -1),
                     bf_multi.setShortBoolean(( short ) -1, false));
        assertEquals(bf_single.clearShort(( short ) -1),
                     bf_single.setShortBoolean(( short ) -1, false));
    }

    /**
     * main method to run the unit tests
     *
     * @param ignored_args
     */

    public static void main(String [] ignored_args)
    {
        System.out.println("Testing util.BitField functionality");
        junit.textui.TestRunner.run(TestBitField.class);
    }
}