Mockito：arg表示采用多个参数的方法

Question

I am trying to use Mockito's argThat API:

verify(mockService).methodA(argThat((List ids, int b) -> ids.get(0).equals("123")));

mockService has methodA which takes two parameters: a List and a primitive integer.

But this gives me an error:

"Imcompatible parameter types in lambda expression".

The reason is that ArgumentMatcher's matches method takes only one argument.

So how can I do verification for such scenarios?

Answer 1

You should use an argThat wildcard for each of the inputs:

verify(mockService).methodA(argThat((List ids) -> ids.get(0).equals("123"))
          , argThat((int b) -> b < 1);

I would also suggest you use @ArgumentCaptor which is an alternative to argThat and makes that custom matching a bit more clear: javadoc . Especially if you have to use both of the params at the same conditional statement.