How do you assert expected exceptions in MSTest?

Short answer: [TestMethod] [ExpectedException(typeof(DivideByZeroException))] public void Divide_ByZero_ThrowsException()

Example code

{
var calculator = new Calculator(); calculator.Divide(10, 0); }

Real-world example (ShopNest)

Arrange a cart with 2 items → Act Checkout() → Assert total and that payment was called once.

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.