使用Mockito模拟具有通用参数的类 [英] Using Mockito to mock classes with generic parameters

问题描述

有没有一种用泛型参数嘲笑类的干净方法？假设我必须模拟一个类 Foo< T> ，我需要将它传递给期望 Foo< Bar> 。我可以很容易地做到以下几点：

Is there a clean method of mocking a class with generic parameters? Say I have to mock a class Foo<T> which I need to pass into a method that expects a Foo<Bar>. I can do the following easily enough:

Foo mockFoo = mock(Foo.class);
when(mockFoo.getValue).thenReturn(new Bar());

假设 getValue（）返回泛型类型 T 。但是当我稍后将它传递给期望 Foo< Bar> 的方法时，会有小猫。是铸造这样做的唯一手段？

Assuming getValue() returns the generic type T. But that's going to have kittens when I later pass it into a method expecting Foo<Bar>. Is casting the only means of doing this?

推荐答案

我认为你需要投它，但它不应该太bad：

I think you do need to cast it, but it shouldn't be too bad:

Foo<Bar> mockFoo = (Foo<Bar>) mock(Foo.class);
when(mockFoo.getValue).thenReturn(new Bar());

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