Mockito - 间谍vs模拟 [英] Mockito - spy vs mock

问题描述

Mockito - 我理解间谍调用对象上的真实方法，而模拟调用double对象上的方法。除非有代码气味，否则应避免使用间谍。
然而，间谍如何工作以及我何时应该使用它们？
它们与模拟有什么不同？

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双打。

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

不幸的是，Mockito的区别很奇怪。

Mockito is unfortunately making the distinction weird.

模拟mockito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（对象的一部分将被模拟，部分将使用实际方法调用）。

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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