Moq

.NET Testing

Mocking in .NET: Moq vs NSubstitute for Unit Testing

Unit tests that hit real databases, external APIs, or file systems are slow, brittle, and environment-dependent. Mocking frameworks let you replace real dependencies with controlled fakes. In .NET, two frameworks dominate: Moq and NSubstitute. Both work. The differences are real but not dramatic. This guide covers practical usage of