CODEWITHSUNDEEP
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Izaya
Izaya

Reputation: 1568

Mockito 3 any() Strict stubbing argument mismatch

I'm using Mockito 3.1.0.

I'm trying to Mock my method with this syntax:

when(mockedObject.myMethod(any(HttpServletRequest.class)).thenReturn(1);

myMethod is simply:

public Integer myMethod(HttpServletRequest request) {
    return 0;
}

In the method I'm testing it's simply called by:

int r = myObject.myMethod(request);

But I'm getting:

org.mockito.exceptions.misusing.PotentialStubbingProblem: 
Strict stubbing argument mismatch. Please check:
 - this invocation of 'myMethod' method:
    mockedObject.myMethod(null);
    -> at somefile.java:160)
 - has following stubbing(s) with different arguments:
    1. mockedObject.myMethod(null);
      -> at somefileTest.java:68)

Upvotes: 8

Views: 29321

Answers (3)

Omer Faruk Dasar
Omer Faruk Dasar

Reputation: 150

In my case, method's arguments are not matching with the actual method. Yes, you can use any but that is not a good practice. You should explicitly use the argument that you are using in the actual method.

Upvotes: 0

RAM237
RAM237

Reputation: 1035

You can use nullable(MyClass.class) to accept either null or given type.

This is the earliest appearance I think (v2.5.0), but is also available in Mockito 3, and in the latest (v5.8.0)

However, it is unlikely that you have unused HttpServletRequest request, so to avoid NullPointerException, you may want to mock it instead of allowing it to be nullable in the Test.

Upvotes: 0

Izaya
Izaya

Reputation: 1568

As explained here any(myClass) doesn't work if the provided argument is null, only any() does as explained here. In my case, request was null so any(HttpServletRequest.class) couldn't catch it. I fixed it by changing

when(mockedObject.myMethod(any(HttpServletRequest.class)).thenReturn(1);

to this if you are sure it will be null

when(mockedObject.myMethod(null)).thenReturn(1);

or to this if you want to catch all cases

when(mockedObject.myMethod(any())).thenReturn(1);

Another method is to use ArgumentMatchers:

when(mockedObject.myMethod(ArgumentMatchers.<HttpServletRequest>any())).thenReturn(1);

Thanks @xerx593 for the explanation.

Upvotes: 10

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