private int bytesRead = 0;

        public TestServerMessageBlock(Configuration config) {
            super(config);
        }

        public TestServerMessageBlock(Configuration config, byte command) {
            super(config, command);
        }

        public TestServerMessageBlock(Configuration config, byte command, String path) {
            super(config, command, path);
        }

        @Override

import org.junit.jupiter.api.Test;

class ServerMessageBlockTest {

    private TestServerMessageBlock smb;

    // A concrete implementation of the abstract ServerMessageBlock for testing
    private static class TestServerMessageBlock extends ServerMessageBlock {
        private byte[] paramWords;
        private byte[] bytes;

        TestServerMessageBlock() {
            super();
            this.paramWords = new byte[0];