单元测试单元测试 - C ++？ [英] How to unit test Singleton class - C++?

问题描述

在C ++中单元测试单元格式的方法是什么？ （附例子）

What are the ways to unit test a Singleton pattern in C++? (with examples please)

推荐答案

使单例执行成为一个单独的类，并使包装器实现单身外。这样，您可以尽可能多地测试实现（除了单纯行为是不必要的。

Make the implementation of the singleton a separate class, and make a wrapper that implements the "singletonness" outside. That way you can test the implementation as much as you like (except the singleton behavior which is trivial and unnecessary.

class SingletonImpl {
public:
  int doit(double,double);
};

class Singleton {
public:
  Singleton& instance() {...}
  int doit(double a,double b) {impl->doit(a,b);}
  ...
private:
  SingletonImpl impl;
}

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