如何在 Java (jUnit4) 中轻松模拟出静态方法

时间:2022-12-27
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问题描述

如何在 Java 中轻松模拟出静态方法?

How do I easily mock out a static method in Java?

我正在使用 Spring 2.5 和 JUnit 4.4

I'm using Spring 2.5 and JUnit 4.4

@Service
public class SomeServiceImpl implements SomeService {

    public Object doSomething() {
        Logger.getLogger(this.class); //a static method invoked.
        // ...
    }
}

我不控制我的服务需要调用的静态方法,因此我无法将其重构为更易于单元测试.我以 Log4J Logger 为例,但真正的静态方法类似.改变静态方法不是一个选项.

I don't control the static method that my service needs to invoke so I cannot refactor it to be more unit-testable. I've used the Log4J Logger as an example, but the real static method is similar. It is not an option to change the static method.

做 Grails 工作,我习惯使用类似的东西:

Doing Grails work, I'm used to using something like:

def mockedControl = mockFor(Logger)
mockControl.demand.static.getLogger{Class clazz-> … }
…
mockControl.verify()

如何在 Java 中做类似的事情?

How do I do something similar in Java?

推荐答案

基本上,在 Java + Spring 2.5 &目前是 JUnit 4.4.

Basically, There isn't an easy way to do this in Java + Spring 2.5 & JUnit 4.4 at the moment.

虽然可以重构并抽象出静态调用,但重构代码并不是我想要的解决方案.

Although it is possible to refactor, and abstract away the static call, Refactoring the code isn't the solution that I was looking for.

JMockit 看起来可以工作,但与 Spring 2.5 和 JUnit 4.4 不兼容.

JMockit looked like it would work, but is incompatibile with Spring 2.5 and JUnit 4.4.

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