java - 如何在 Mockito 中模拟 instanceof

Question

我有一段代码，我想用 Mockito 测试:

mockedClass instanceof SampleInterface

mockedClass 是模拟抽象类:MockedClass ，SampleInterface 是一个接口(interface)。这是失败点:

Validate.isTrue(mockedClass instanceof SampleInterface, "The mockedClass is not a SampleInterface");

如何模拟这段代码？

Answer 1

听起来你需要MockSettings.extraInterfaces .

MockedClass mockedClass = mock(MockedClass.class,
    withSettings().extraInterfaces(SampleInterface.class));

请注意，它带有自己的警告标签:

This mysterious feature should be used very occasionally. The object under test should know exactly its collaborators & dependencies. If you happen to use it often than [sic] please make sure you are really producing simple, clean & readable code.

作为替代方案，创建一个用于测试的接口(interface)，它扩展了您希望模拟实现的所有接口(interface)，并以通常的方式对其进行模拟。

public abstract class ForTest implements SampleInterface {}

MockedClass mockedClass = mock(ForTest.class);