How can I mock dependencies in my ViewModels for testing?

How can I mock dependencies in my ViewModels for testing?

You can use libraries like Mockito or MockK to create mock objects for your dependencies in ViewModels.

Can you show me a simple example using Mockito?

Sure! First, add Mockito to your project. Then, in your test class, you can do something like this:

@Mock
private MyDependency myDependency;

@Before
public void setUp() {
    MockitoAnnotations.initMocks(this);
    viewModel = new MyViewModel(myDependency);
}

What if I want to verify that a method was called on the mock?

You can use the verify method in Mockito. For example:

verify(myDependency).someMethod();

Are there any best practices for mocking in ViewModels?

Yes! Keep your mocks simple, avoid over-mocking, and ensure your tests are focused on one behavior at a time.