Write a Mock method applicable only for specific tests in a test class

Question

I have a test class in which I have around 10 unit test cases. In this, I have a mock method created which is useful in just 2 of the 10 test cases.

public static class MockCreateStudent extends Mockup<CreateStudentDAO>{
    @Mock
    public boolean isFeesPaid(long studentID){
        return true;
    }
}

So technically I want the isFeesPaid() method to be executed as-is for 8 test cases and mocked for 2 of the test cases.

Is there any way this can be achieved?

That doesn't sound right - why do you only mock the collaborator under certain circumstances? — jonrsharpe
– jonrsharpe, Commented Jul 31, 2019 at 9:57
@jonrsharpe: I just mentioned a simplified version of my actual problem statement above. Practically the isFeesPaid() method takes 4 parameters and populating them is a tedious task. For the 2 test cases that I'm talking about, this method isn't significant. So I'm trying to make it simpler by mocking it. Makes sense? — Curious Coder
– Curious Coder, Commented Jul 31, 2019 at 10:20

Maciej Kowalski · Accepted Answer · 2019-07-31 10:47:51Z

2

Use a spy in that case instead of a mock. For most of the cases, it will invoke the real implementation of the collaborator and for those 2 cases, you use the given().willReturn() stubbing in the //Given section just before you invoke the SUT.

Here is more info on the spy annotation which I would recommend you use: link

answered Jul 31, 2019 at 10:47

Maciej Kowalski

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