Two of the most famous mocking frameworks EasyMock and Mockito, don’t offer out of the box support for mocking final and static methods.
It is often said on forums that “you don’t want that” or “your code is badly designed” etc. Well this might be true some of the time, but not all of the time. Continue reading
Mockito has a very nice feature that allows you to verify what parameters were used when a method was executed.
For example:
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ArgumentCaptor<Person> argument = ArgumentCaptor.forClass(Person.class); verify(mock).doSomething(argument.capture()); assertEquals("John", argument.getValue().getName()); |
However, when using generic typed objects, some problems rise up.
For example, the following won’t work:
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ArgumentCaptor<List<Person>> argument = ArgumentCaptor.forClass(List<Person>.class); |
This is obviously not a Mockito problem, but a generics problem.
To solve this, follow these two steps:
1. use the @Captor annotation.
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@Captor private ArgumentCaptor<List<Person>> argumentCaptor; |
2. initialize the Mockito annotations in your initialization method (add one if you don’t have one).
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@Before public void init(){ MockitoAnnotations.initMocks(this); } |
And presto! You can now capture the parameters that were used when a to be verified method was executed.
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verify(someMock).someMethod(argumentCaptor.capture()); |