如何模拟地图的返回值? [英] How to mock the return value of a Map?

问题描述

我有如下代码:

for (Map.Entry<Integer, Action> entry : availableActions.entrySet()) {
  ...
}

我试图这样模拟它:

Map mockAvailableActions = mock(Map.class, Mockito.RETURNS_DEEP_STUBS);
mockAvailableActions.put(new Integer(1), mockAction);

我认为就足够了.但是entrySet为空.所以我添加了这个:

I would think that would be enough. But entrySet is empty. So I added this:

when(mockAvailableActions.entrySet().iterator()).thenReturn(mockIterator);
when(mockIterator.next()).thenReturn(mockAction);

仍然entrySet为空.我究竟做错了什么?感谢您的输入！

Still entrySet is empty. What am I doing wrong? Thanks for any input!

推荐答案

也许我遗漏了一些东西，但为什么不这样做呢?

Perhaps I'm missing something, but why not just do this:

Map.Entry<Integer, Action> entrySet = <whatever you want it to return>
Map mockAvailableActions = mock(Map.class);
when(mockAvailableActions.entrySet()).thenReturn(entrySet);

还要考虑您是否真的需要模拟地图，难道不是一个真正的人吗?嘲笑通常用于替换您不想参与单元测试的其他代码，Map是Java核心语言的一部分，通常不被嘲弄.

Also consider whether you actually need a mock Map at all, wouldn't a real one do the job? Mocks are usually used to replace other pieces of your code which you don't want to be involved in your unit test, a Map is part of the core Java language and isn't usually mocked out.

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