使用Mockito为Java服务方法中包含用户输入的字符串比较逻辑编写单元测试

// 辅助类定义
class DailyMenu {
    private List<MenuItem> menuItemList = new ArrayList<>();
    public List<MenuItem> getMenuItemList() { return menuItemList; }
    public void setMenuItemList(List<MenuItem> menuItemList) { this.menuItemList = menuItemList; }
}

class MenuItem {
    private String names;
    private String description;
    private String image;
    private float price;

    public MenuItem() {}
    public MenuItem(String names, String description, String image, float price) {
        this.names = names;
        this.description = description;
        this.image = image;
        this.price = price;
    }

    public String getNames() { return names; }
    public void setNames(String names) { this.names = names; }
    public String getDescription() { return description; }
    public void setDescription(String description) { this.description = description; }
    public String getImage() { return image; }
    public void setImage(String image) { this.image = image; }
    public float getPrice() { return price; }
    public void setPrice(float price) { this.price = price; }

    @Override
    public String toString() {
        return "MenuItem{" +
               "names='" + names + '\'' +
               ", description='" + description + '\'' +
               ", image='" + image + '\'' +
               ", price=" + price +
               '}';
    }
}

interface MenuPrinter {
    void printMenu(DailyMenu dailyMenu);
}

// 原始服务方法所在的类
public class MenuService {
    private final Scanner scanner;
    private final MenuPrinter menuPrinter;

    // 假设 Scanner 和 MenuPrinter 通过构造函数注入
    public MenuService(Scanner scanner, MenuPrinter menuPrinter) {
        this.scanner = scanner;
        this.menuPrinter = menuPrinter;
    }

    public void updateMenu(DailyMenu dailyMenu) {
        try {
            menuPrinter.printMenu(dailyMenu);
            System.out.print("Insert menu item want to update:");
            String changeItem = scanner.nextLine(); // 读取用户输入的菜单项名称

            dailyMenu.getMenuItemList().forEach((MenuItem menuItem)->{
                // 核心逻辑：字符串比较
                if(menuItem.getNames().equals(changeItem)){
                    System.out.print("\nInsert name: ");
                    menuItem.setNames(scanner.nextLine());
                    System.out.print("Insert description: ");
                    menuItem.setDescription(scanner.nextLine());
                    System.out.print("Insert image: ");
                    menuItem.setImage(scanner.nextLine());
                    System.out.print("Insert price:");
                    menuItem.setPrice(scanner.nextFloat());
                }
            });
        } catch (NullPointerException | IllegalStateException exception){
            System.err.println(exception.getMessage()); // 使用 System.err 打印错误
        } catch (InputMismatchException exception){
            System.err.print(new InputMismatchException("Menu item quantity must be number !!!").getMessage());
        }
    }
}