gamedb | Reicast game compat db | Mobile Application library

You need to use relative XPath:

Note: I am only trying to test process() method here. But process method is calling a private method from inside. I want to be able to return a mock value for private method rather than executing the private method.

You should not do that because MyClass is your class under test. You cannot cover the logic inside the private methods with tests if you stub them. Instead, you should make sure that the injected mocks behave the way you want them to (via stubbed methods) if they are used inside those private method. Unfortunately you decided not to show that crucial part of your code even though the exact answer depends on it. Instead you replaced them with comments "some business logic", which is not very helpful because your business logic is what you want to test. You don't want to stub it out.

So please don't do what I am showing you here, I am answering only because you asked.

In order to stub a method it must not be private because spies, mocks or stubs technically are always subclasses or the originals and subclasses cannot inherit or even call private methods. Thus, you need to make the methods protected (so subclasses can use or override them) or package-scoped. I recommend the former.

But you cannot use a normal mock or stub as a stand-in for your class under test because you only want to stub out part of the business logic (your two methods in question), not the whole logic (you want to keep process()). Thus, you need a partial mock. For this purpose you can use a spy.

Dummy dependency classes: