Hi. Suddenly found out that I can't use mockito's `any(Class)` argument matcher. Shortcuts like `any...

# announcements

[apomelov]

Hi. Suddenly found out that I can't use mockito's any(Class) argument matcher. Shortcuts like anyString or anyInt work. Even works with primitives like so: doNothing().when(mock).test(any(Int::class.java). But If I change Int in this sample to smth more valuable, e.g. BigInteger, it fails with

You cannot use argument matchers outside of verification or stubbing.

I'm mocking an interface with spring's MockBean annotation. What am I doing wrong?

[lovis]

problem is that any or anyObject return null, which is probably not what you expect, while anyInt returns an Int (I think -1, but I’m not sure)

[lovis]

hmm. no wait, that should actually give you a different error

[apomelov]

Error description contains this:

This message may appear after an NullPointerException if the last matcher is returning an object 
like any() but the stubbed method signature expect a primitive argument, in this case,
use primitive alternatives.
    when(mock.get(any())); // bad use, will raise NPE
    when(mock.get(anyInt())); // correct usage use

[apomelov]

O! that's about nulls. I just changed signature of the tested method: replaced all types with nullable ones. Now it works.

[lovis]

Yes, but I guess you don’t want the signature change. So what you need is something like

private fun <T> safeAny(): T {
    return null as T
}

[lovis]

or use https://github.com/nhaarman/mockito-kotlin I think it has this already

[apomelov]

yeah, I already saw that lib.. thanks

[apomelov]

only thing still is not clear: will I be able to integrate it with spring boot test runner. I specify my application context there and add mockbeans. It creates context, replacing some beans with mocks. Using mockito.

[lovis]

Not sure about that. Maybe ask in #C0B8ZTWE4

[lovis]

but the testrunner should’nt use any matchers by itself, should it?

[lovis]

it doesn’t assert anything

[apomelov]

It creates the mock object

[lovis]

then it should be fine. the issue is with the matchers only

[apomelov]

yes, it works. Just use <T> any() from mockito-kotlin instead of any(Class<T>) from mockito itself.