Verify method call that accepts array of objects

Question

I want to verify that the following method is called

MessageSourceAccessor.getMessage(String code, Object[] args, Locale locale)

with 10th member of args array equal to "CHF" and I don't want to check other members of this array.

So far I tried the following construction:

Object [] obj = new Object[] {anyObject(),
        anyObject(), anyObject(), anyObject(), anyObject(), anyObject(), anyObject(), anyObject(), anyObject(), "CHF", anyObject(), anyObject()};

verify(msa, times(1))
        .getMessage(eq("invoice.emailBody.1"), aryEq(obj), any(Locale.class));

Unfortunately mockito complains that I cannot use anyObject() in this case. On the other hand if I don't use it I must provide values for all of the array members which is not what I want.
Perhaps someone faced this issue before? If so, I would appreciate any help

Thanks

Answer 1

You can use an ArgumentCaptor to capture the args argument and then inspect the captured value to assert that the 10th member of args array is equal to "CHF". For example:

    msa.getMessage(code, args, aLocale);

    ArgumentCaptor<Object> captor = ArgumentCaptor.forClass(Object.class);
    Mockito.verify(mock).getMessage(Mockito.anyString(), (Object[]) captor.capture(), Mockito.any(Locale.class));

    List<Object> actualArgs = Arrays.asList((Object[]) captor.getValue());
    Assert.assertEquals(10, actualArgs.size());
    Assert.assertEquals("CHF", actualArgs.get(9));
}