How can I mock asynchronous methods using Mockito?

How can I mock asynchronous methods using Mockito?

You can use Mockito's when and thenReturn methods to mock asynchronous methods. For example, if you have a method that returns a CompletableFuture, you can do something like this: when(yourService.asyncMethod()).thenReturn(CompletableFuture.completedFuture(yourValue));

What if the asynchronous method throws an exception?

You can use thenThrow to simulate an exception. For instance: when(yourService.asyncMethod()).thenThrow(new YourException()); This will allow you to test how your code handles exceptions.

Can I verify that the asynchronous method was called?

Yes, you can use verify to check if the method was called. For example: verify(yourService).asyncMethod(); This will confirm that the method was invoked during the test.

Are there any best practices for mocking asynchronous methods?

It's best to keep your mocks simple and focus on the behavior you want to test. Avoid over-mocking and ensure your tests are readable.