对 TDD 友好的单例类 [英] TDD-friendly Singleton-like class

问题描述

我有至少 2 个其他类使用的存储库类.这个存储库类需要初始化——成本很高(查询数据库).现在，我在需要的地方创建单独的存储库实例.问题是，每次我创建存储库时都必须对其进行初始化.如何设计这样的存储库对 TDD 友好?我想到的第一件事是单身，但它不是解决方案.

I have repository class that is used by at least 2 other classes. This repository class needs to be initialized - which is high in cost (querying database). Now, I create separate instances of repository wherever I need it. The thing is, that everytime I create repository it has to be initialized. How to design such repository to be TDD-friendly? The first thing in my mind was Singleton but it's not the solution.

推荐答案

您使用任何类型的 IOC 容器吗?Unity 是我选择的容器，它包含一个 ContainerControledLifetimeManager 这使您的类成为单例，但不由您自己管理.

Do you use any type of IOC container? Unity is my container of choice, and it contains a ContainerControledLifetimeManager which makes your class a singleton, but not managed by yourself.

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