org.mockito.exceptions.misusing.CannotStubVoidMethodWithReturnValue

最新推荐文章于 2024-09-13 08:34:33 发布

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最新推荐文章于 2024-09-13 08:34:33 发布

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本文介绍了解决使用Mockito进行单元测试时遇到的重载方法Mock失败的问题。文章详细解释了错误产生的原因，并提供了几种有效的解决方法，包括直接Mock父类的方法等。

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错误原因:mock的时候,不能mock重载的方法

解决方法:直接mock它的父类的方法

org.mockito.exceptions.misusing.CannotStubVoidMethodWithReturnValue:
'flush' is a *void method* and it *cannot* be stubbed with a *return value*!
Voids are usually stubbed with Throwables:
doThrow(exception).when(mock).someVoidMethod();
***
If you're unsure why you're getting above error read on.
Due to the nature of the syntax above problem might occur because:
1. The method you are trying to stub is *overloaded*. Make sure you are calling the right overloaded version.
2. Somewhere in your test you are stubbing *final methods*. Sorry, Mockito does not verify/stub final methods.
3. A spy is stubbed using when(spy.foo()).then() syntax. It is safer to stub spies -
- with doReturn|Throw() family of methods. More in javadocs for Mockito.spy() method.
4. Mocking methods declared on non-public parent classes is not supported.