java Mockito - 返回与传入方法相同的对象
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Mockito - returning the same object as passed into method
提问by LechP
Let's imagine I have a following method in some service class:
假设我在某个服务类中有以下方法：
public SomeEntity makeSthWithEntity(someArgs){
SomeEntity entity = new SomeEntity();
/**
* here goes some logic concerning the entity
*/
return repository.merge(entity);
}
I'd like to test the behaviour of this method and thus want to mock the repository.mergein following manner:
我想测试此方法的行为，因此想以repository.merge以下方式模拟：
when(repository.merge(any(SomeEntity.class))).thenReturn(objectPassedAsArgument);
Then mocked repository returns that what makesSthWithEntitypassed to it and I can easily test it.
然后模拟存储库返回makesSthWithEntity传递给它的内容，我可以轻松测试它。
Any ideas how can I force mockito to return objectPassedAsArgument?
任何想法如何强制 mockito 返回objectPassedAsArgument？
采纳答案by Mark Peters
You can implement an Answerand then use thenAnswer()instead.
您可以实现一个Answer然后使用thenAnswer()。
Something similar to:
类似于：
when(mock.someMethod(anyString())).thenAnswer(new Answer() {
public Object answer(InvocationOnMock invocation) {
return invocation.getArguments()[0];
}
});
Of course, once you have this you can refactor the answer into a reusable answer called ReturnFirstArgumentor similar.
当然，一旦你有了这个，你就可以将答案重构为一个可重用的答案，称为ReturnFirstArgument或类似的。
回答by Brice
Or better using mockito shipped answers
或者更好地使用 mockito 提供的答案
when(mock.something()).then(AdditionalAnswers.returnsFirstArg())
Where AdditionalAnswers.returnsFirstArg()could be statically imported.
哪里AdditionalAnswers.returnsFirstArg()可以静态导入。
回答by Filomat
It can be done easy with Java 8 lambdas:
使用 Java 8 lambdas 可以轻松完成：
when(mock.something(anyString())).thenAnswer(i -> i.getArguments()[0]);
