How to use @InjectMocks with Mockito - Tutorial

Learn about how you can use @InjectMocks to automatically add services to classes as they are tested with Mockito.
@InjectMocks will allow you to inject other spies and mocks into a class that requires services when it is being tested. The annotation will scan the class under test and automatically inject all available mocks and spies from within the test class. No more NullPointerExceptions when an unknown service is called!
Link to source code: github.com/4neesh/TH-cam-Cha...
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[@semharweldegiorgis8090]

Very well explained. Exactly what I was looking. Thank you!!

[@AneeshMistry]

Thanks Semhar!

[@dm1tryr905]

@@AneeshMistry GETVegetarianBreakfest()

[@akshayrc]

This was helpful!

[@AneeshMistry]

Thank you Akshay!

[@vlaskz]

Fantastic!

[@AneeshMistry]

Thank you!

[@pguti778]

Great video!! I'll subscribe!!!

[@AneeshMistry]

Thank you Pablo!!

[@akshaysilgari2097]

Good explanation...

[@AneeshMistry]

Thank you!

[@amrutafolane3040]

Great Tutorial!
Two questions:
1) Why did you choose `@Spy` over `@Mock` for the mocked classes?
2) How to implement mocks if I have another custom logger class inside of BreakfastWaiter and DinnerWaiter classes? In that case, it will be a mock inside mock, Ive tried just mocking the BreakfastWaiter for example, but when I call the method in its CustomLogger class, it would throw a NullPointer. How to tackle that case?

[@soumyadebbasu7882]

Can we also annotate the two breakfast and dinner services with @Autowired annotation? If we do not use constructor or setters ?

[@AneeshMistry]

Yes, inject mocks works the exact same way. No need to make any changes to the test, the injected classes will be automatically picked up

[@takalanimufamadi1368]

I get a null pointer exception when I implement this. It says that " this.customerOrder is null ".

[@AneeshMistry]

Hi Takalani, please can you share the link to the src code? Are you annotating the class with MockitoJUnitRunner.class?