RLE 程序有问题。 （游程编码）

Question

我怎样才能使测试有效？ ，我没有在我的代码中遇到错误。我是新的学习JAVA。我知道问题出在阵列上，但我不知道如何解决它。

解压错误：“array lengths differed, expected.length=2 actual.length=5; arrays first different at element [2];”

压缩错误：“数组长度不同，expected.length=3 actual.length=2；数组首先在元素 [0] 处不同；”

代码：

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class RLE {
    public static void compress(InputStream is, OutputStream os) throws IOException {
        int currentByte = is.read();
        int count = 1;

        while (currentByte != -1) {
            int nextByte = is.read();

            if (nextByte == currentByte && count < 255) {
                count++;
            } else {
                os.write((byte) count);
                os.write((byte) currentByte);
                count = 1;
            }

            currentByte = nextByte;
        }

        os.flush();
        is.close(); 
        os.close(); 
    }

    public static void decompress(InputStream is, OutputStream os) throws IOException {
        int currentByte = is.read();

        while (currentByte != -1) {
            int count = currentByte;
            int value = is.read();

            byte[] bytes = new byte[count];
            for (int i = 0; i < count; i++) {
                bytes[i] = (byte) value;
            }

            os.write(bytes);
            currentByte = is.read();
        }

        os.flush();
        is.close(); 
        os.close(); 
    }
}

测试：

import java.io.*;

import static org.junit.Assert.*;

public class RLETest {

    private void test1(byte[] expected, byte[] input) throws Exception {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        RLE.compress(new ByteArrayInputStream(input), bos);
        assertArrayEquals(expected, bos.toByteArray());
    }

    private void test2(byte[] expected, byte[] input) throws Exception {
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        RLE.decompress(new ByteArrayInputStream(input), bos);
        assertArrayEquals(expected, bos.toByteArray());
    }

    @org.junit.Test
    public void compress() throws Exception {
        test1(new byte[]{1,1,4}, new byte[]{1,1,1,1,1,1});
        test1(new byte[]{1,1,0}, new byte[]{1,1});
        test1(new byte[]{1,2,3}, new byte[]{1,2,3});
        test1(new byte[]{1, 1, 0, 2, 2, 0, 3, 3, 0}, new byte[]{1, 1, 2, 2, 3, 3});
        test1(new byte[]{1, 2, 3, 3, 1, 4}, new byte[]{1, 2, 3, 3, 3, 4});
        test1(new byte[]{1,2,3,3,0}, new byte[]{1, 2, 3, 3});

        byte[]ar;

        ar = new byte[260];
        for (int i = 0; i < ar.length; i++) {
            ar[i] = 100;
        }

        test1(new byte[]{100,100,(byte) 255, 100, 100, 1}, ar);

        ar = new byte[550];
        for (int i = 0; i < ar.length; i++) {
            ar[i] = 100;
        }

        test1(new byte[]{100,100,(byte) 255, 100, 100, (byte) 255, 100, 100, 34}, ar);
    }

    @org.junit.Test
    public void decompress() throws Exception {
        test2(new byte[]{5,5}, new byte[]{5,5,0});
        test2(new byte[]{1,2,3}, new byte[]{1,2,3});
        test2(new byte[]{1,2,2,3}, new byte[]{1,2,2,0,3});
        test2(new byte[]{1,2,3,3,3,3}, new byte[]{1,2,3,3,2});
        test2(new byte[]{5}, new byte[]{5});
        test2(new byte[]{1,1,2,2,3,3,4,4}, new byte[]{1,1,0,2,2,0,3,3,0,4,4,0});

        byte[]ar;

        ar = new byte[202];
        for (int i = 0; i < ar.length; i++) {
            ar[i] = 55;
        }

        test2(ar, new byte[]{55,55,(byte)200});

        ar = new byte[259];
        for (int i = 0; i < ar.length; i++) {
            ar[i] = 55;
        }

        test2(ar, new byte[]{55,55,(byte)255, 55, 55, 0});

    }


}