How to mock classA object which is created in classB?

Question

I have something as,

classB {
    classA a = new classA();
    ...
}

classA {
    ...
}

I would like to write junit on classB. How to mock object a of classA?

One should not create `A` within `B`'s constructor and instead use [Inversion of Control](https://en.wikipedia.org/wiki/Inversion_of_control#:~:text=In%20software%20engineering%2C%20inversion%20of,control%20from%20a%20generic%20framework.) to pass an instance of `A` to `B`'s constructor. The only other way that comes to my mind is using powermock, but this messes with the bytecode and thus cann screw up JaCoCo Code coverage. — Turing85, Jul 25 '20 at 11:50

score 0 · Answer 1 · answered Jul 25 '20 at 11:59

0

Pass the A in as a parameter to the constructor of B.

answered Jul 25 '20 at 11:59

1 Answers1