PowerMock 测试 - 设置类的静态字段 [英] PowerMock testing - set static field of class

问题描述

我很难找到设置类的静态字段的方法.基本上是这样的:

I'm having difficulty finding a way to set a static field of a class. It's basically like this:

public class Foo{
    // ...
    private static B b = null;
}

其中 B 是另一个类.

where B is another class.

除了 setInternalStateFromContext() 之外，在 PowerMock 中还有什么方法可以做到这一点吗?使用上下文类方法设置一个字段似乎有点矫枉过正.

Is there any way to do this in PowerMock other than with setInternalStateFromContext()? Using the context class method seems a bit of overkill for setting one field.

谢谢.

推荐答案

Whitebox.setInternalState(Foo.class, b);

只要您设置了一个非空值，和就可以工作，如果只有一个字段具有 B 的类.如果您不能依赖这种奢侈，您必须提供字段名称并将 null 强制转换为您要设置的类型.在这种情况下，您需要编写如下内容:

Works as long as you set a non-null value, and if theres only one field with the class of B. If you can't rely on that luxury, you have to provide the field-name and cast the null to the type you want to set. In that case you would need to write something like this:

 Whitebox.setInternalState( Foo.class, "b", (B)null );

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