public void addBook(Book b){ String sql="insert into Book values('"+b.getBook_ISBN()+"','"+b.getBook_category()+"','"+b.getBook_name()+"','"+b.getBook_author()+"','"+b.getPublish_house()+"','"+b.getPublish_time()+"','"+b.getBook_price()+"','"+b.getBook_sum()+"','"+b.getBook_remain()+"','"+b.getBook_introduce()+"')"; Object params[]={b.getBook_ISBN(),b.getBook_category(),b.getBook_name(),b.getBook_author(),b.getPublish_house(),b.getPublish_time(),b.getBook_price(),b.getBook_sum(),b.getBook_sum(),b.getBook_remain(),b.getBook_introduce()}; DBHelper.executeUpdate(sql,params); }实现junit测试的代码

可以参考以下代码实现JUnit测试：

import static org.junit.Assert.assertEquals;
import static org.mockito.ArgumentMatchers.any;
import static org.mockito.Mockito.mock;
import static org.mockito.Mockito.verify;
import static org.mockito.Mockito.when;

import org.junit.Test;

public class BookTest {
    
    @Test
    public void testAddBook() {
        // 创建一个模拟的DBHelper对象
        DBHelper mockDBHelper = mock(DBHelper.class);

        // 创建一个Book对象
        Book book = new Book();
        book.setBook_ISBN("1234567890");
        book.setBook_category("Programming");
        book.setBook_name("Java Programming");
        book.setBook_author("John Smith");
        book.setPublish_house("Publishing House");
        book.setPublish_time("2022-01-01");
        book.setBook_price(50.0);
        book.setBook_sum(100);
        book.setBook_remain(90);
        book.setBook_introduce("Introduction");

        // 创建一个BookDao对象
        BookDao bookDao = new BookDao(mockDBHelper);

        // 调用addBook方法
        bookDao.addBook(book);

        // 验证是否调用了DBHelper的executeUpdate方法，并传入了正确的参数
        verify(mockDBHelper).executeUpdate("insert into Book values(?,?,?,?,?,?,?,?,?,?)", 
            book.getBook_ISBN(), book.getBook_category(), book.getBook_name(), book.getBook_author(), 
            book.getPublish_house(), book.getPublish_time(), book.getBook_price(), book.getBook_sum(), 
            book.getBook_remain(), book.getBook_introduce());

        // 使用when和thenReturn方法模拟executeUpdate返回值
        when(mockDBHelper.executeUpdate(any(String.class), any(Object[].class))).thenReturn(1);

        // 调用addBook方法后，期望返回值为1
        int result = bookDao.addBook(book);
        assertEquals(1, result);
    }

}