如何使用新场景扩展Start任务

Question

我刚刚学到了关于serenity-js的知识，并且正在尝试。我正在学习本教程，并注意到了以下示例：

james.attemptsTo(
    Start.withAnEmptyTodoList(),
    AddATodoItem.called('Buy some milk')
)

Start的任务

export class Start implements Task {

    static withATodoListContaining(items: string[]) {       // static method to improve the readability
        return new Start(items);
    }

    performAs(actor: PerformsTasks): PromiseLike<void> {    // required by the Task interface
        return actor.attemptsTo(                            // delegates the work to lower-level tasks
            // todo: add each item to the Todo List
        );
    }

    constructor(private items: string[]) {                  // constructor assigning the list of items
    }                                                       // to a private field
}

我真的很喜欢这个语法，并且想继续这个设置，有更多的开始场景。什么才是实现这个目标的正确方法？

Answer 1

对于任何有相同问题的人，这是我如何解决它的(在serenity-js代码库中找到了类似的设置)：

// Start.ts
export class Start {
    public static withATodoListContaining = (items: string[]): StartWithATodoListContaining => new StartWithATodoListContaining(items);
}

// StartWithATodoListContaining.ts
export class StartWithATodoListContaining implements Task {

    static withATodoListContaining(items: string[]) {       
        return new StartWithATodoListContaining(items);
    }

    performAs(actor: PerformsTasks): PromiseLike<void> {    
        return actor.attemptsTo(                            
            // todo: add each item to the Todo List
        );
    }

    constructor(private items: string[]) {                  
    }                                                       
}