Mockito - @Spy vs @Mock

问题描述

Mockito - 我理解间谍调用对象的真实方法，而模拟调用双重对象的方法.除非有代码气味，否则还要避免间谍.但是，间谍是如何工作的，我应该什么时候真正使用它们?它们与模拟有何不同?

Mockito - I understand a spy calls the real methods on an object, while a mock calls methods on the double object. Also spies are to be avoided unless there is a code smell. However, how do spies work and when should i actually use them? How are they different from mocks?

推荐答案

从技术上讲，模拟"和间谍"都是一种特殊的测试替身".

Technically speaking both "mocks" and "spies" are a special kind of "test doubles".

不幸的是，Mockito 使这种区别变得很奇怪.

Mockito is unfortunately making the distinction weird.

mockito 中的模拟是其他模拟框架中的普通模拟(允许您存根调用；也就是说，从方法调用中返回特定值).

A mock in mockito is a normal mock in other mocking frameworks (allows you to stub invocations; that is, return specific values out of method calls).

mockito 中的间谍是其他模拟框架中的部分模拟(部分对象将被模拟，部分将使用真实的方法调用).

A spy in mockito is a partial mock in other mocking frameworks (part of the object will be mocked and part will use real method invocations).

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