Subversion Repositories mkgmap

/*
 * Copyright (C) 2008 Steve Ratcliffe
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License version 2 as
 *  published by the Free Software Foundation.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *
 * Author: Steve Ratcliffe
 * Create date: 30-Nov-2008
 */
package uk.me.parabola.imgfmt.app;

import org.junit.Test;

import static org.junit.Assert.*;


public class BitReaderTest {

        /**
         * Very simple test that the bit reader is working.
         */
        @Test
        public void testGetBits() {
                // Add your code here
                BitReader br = new BitReader(new byte[]{
                                (byte) 0xf1, 0x73, (byte) 0xc2, 0x5
                });

                assertTrue("first bit", br.get1());
                assertEquals("five bits", 0x18, br.get(5));
                assertEquals("four bits", 0xf, br.get(4));
                assertEquals("sixteen bits", 0x709c, br.get(16));
        }

        @Test
        public void testSpecialNegative() {
                BitReader br = new BitReader(new byte[]{0x24, 0xb});

                int s = br.sget2(3);
                assertEquals(-12, s);
        }
        @Test
        public void testSpecialNegative2() {
                BitReader br = new BitReader(new byte[]{0x2c, 0x0});

                int s = br.sget2(3);
                assertEquals(-6, s);
        }

        @Test
        public void testSpecialPositive() {
                BitReader br = new BitReader(new byte[]{(byte) 0xa4, 0});

                int s = br.sget2(3);
                assertEquals(8, s);
        }
       
        @Test
        public void testWriteRead() {
                for (int i = -20; i <= 20; i++){
                        BitWriter bw = new BitWriter();
                        bw.sputn(i,3);
                        BitReader br = new BitReader(bw.getBytes());

                        int s = br.sget2(3);
                        assertEquals(i, s);
                }
        }
       
       
}