How do you mock dependencies when using MSTest?

Short answer: MSTest itself does not provide mocking capabilities. Use mocking libraries like Moq or NSubstitute alongside MSTest to mock dependencies. Example with Moq: var mockService = new Mock<IService>();

Example code

mockService.Setup(s => s.GetData()).Returns("Test Data"); Moq Framework (Mocking)

Real-world example (ShopNest)

When testing ShopNest’s order service, mock IPaymentGateway so tests do not call Razorpay.

Say this in the interview

1. Define — one clear sentence (the short answer above).
2. Example — relate it to a project like ShopNest or your real work.
3. Trade-off — when you would not use it.