How to mock classA object which is created in classB? [duplicate]

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 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
– Turing85, Commented Jul 25, 2020 at 11:50
Mockito can mock object construction since 3.5.0: javadoc.io/static/org.mockito/mockito-core/5.14.2/org/mockito/… — Aleksandr Baklanov
– Aleksandr Baklanov, Commented Nov 29, 2024 at 17:30

Thorbjørn Ravn Andersen · Accepted Answer · 2020-07-25 11:59:09Z

0

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

answered Jul 25, 2020 at 11:59

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